Endress+Hauser TM372 Specifications

TI01292T/09/EN/04.18
71413048
2018-08-01

Products Solutions Services

Technical Information

iTHERM TrustSens TM371,
TM372

Compact thermometer for hygienic and aseptic
applications
HART®-Protocol

Outstanding sensor technology with self­calibrating function
100% Compliance - 0% Effort

Applications

• Specially designed for use in hygienic and aseptic applications in the Food &
Beverages and Life Sciences industries

• Measuring range: –40 to +160 °C (–40 to +320 °F)

• Pressure range up to 50 bar (725 psi)

• Protection class: IP67/68 or IP69K

• Communication: Analog output 4 to 20 mA, HART® protocol

Your benefits

• Risk and cost reduction thanks to self-calibration and 'Heartbeat technology'

• Fully automated, traceable, inline self-calibration

• Automatized documentation, memory for 350 self-calibration points

• Printable calibration certificate - audit proof

• Elimination of nonconformity or undetected failures

• International certifications, regulations (EC/EU), approvals and declarations of
conformity:
– EHEDG, ASME BPE, FDA, 3-A, EC 1935/2004, EC 2023/2006, EU 10/2011
– CE/EAC, CRN, CSA General Purpose

• Highest measurement accuracy through sensor-transmitter matching

• Heartbeat Technology

Table of contents

iTHERM TrustSens TM371, TM372

Function and system design ................... 3

iTHERM TrustSens ............................ 3

Measuring principle ............................ 3

Measuring system ............................. 3

Equipment architecture ......................... 4

Input ..................................... 5

Measuring range .............................. 5

Output ................................... 5

Output signal ................................ 5

Failure information ............................ 5

Load ...................................... 5

Linearization/transmission behavior ................. 5

Filter ...................................... 5

Protocol-specific data ........................... 5

Wiring ................................... 6

Supply voltage ............................... 6

Current consumption ........................... 6

Electrical connection ........................... 6

Device plug connection .......................... 7

Overvoltage protection .......................... 7

Performance characteristics ................... 7

Reference operating conditions .................... 7

Internal calibration point ........................ 7

Measurement uncertainty ........................ 8

Long-term drift ............................... 8

Influence of ambient temperature .................. 8

Influence of supply voltage ....................... 8

Response time ............................... 9

Calibration .................................. 9

Insulation resistance .......................... 11

Installation ............................... 11

Orientation ................................ 11

Installation instructions ........................ 11

Material .................................. 24

Surface roughness ............................ 24

Protection tube .............................. 25

Operability ............................... 33

Operating concept ............................ 33

Local operation .............................. 33

Remote operation ............................ 33

Certificates and approvals ................... 34

CE mark ................................... 34

EAC mark ................................. 34

cCSAus ................................... 34

MTBF .................................... 34

Hygiene standard ............................ 34

Other standards and guidelines ................... 34

Parts in contact with the medium .................. 34

CRN approval ............................... 34

Surface purity ............................... 35

Material resistance ........................... 35

Material certification .......................... 35

Calibration ................................. 35

Protection tube testing and load capacity calculation ..... 35

Ordering information ....................... 35

Application packages ....................... 35

Heartbeat diagnostics .......................... 35

Heartbeat verification ......................... 36

Heartbeat Monitoring ......................... 36

Accessories ............................... 37

Device-specific accessories ...................... 37

Communication-specific accessories ................ 40

Service-specific accessories ...................... 41

System components ........................... 42

Documentation ............................ 42

Environment .............................. 13

Ambient temperature range ..................... 13

Storage temperature range ...................... 13

Climate class ............................... 13

Degree of protection .......................... 14

Shock and vibration resistance .................... 14

Electromagnetic compatibility (EMC) ............... 14

Process .................................. 14

Process temperature range ...................... 14

Thermal shock .............................. 14

Process pressure range ......................... 14

Medium - state of aggregation .................... 15

Mechanical construction .................... 15

Design, dimensions ........................... 15

Weight ................................... 24

2 Endress+Hauser

iTHERM TrustSens TM371, TM372

mm

inch

Function and system design

The iTHERM TrustSens thermometer incorporates a groundbreaking innovation – its self-calibration
functionality. Under normal operation a standard Pt100 sensor element is being used. By means of a
built-in, highly accurate reference sensor, the Pt100 measurement is automatically calibrated at a
certain process temperature. This eliminates the need to remove the thermometer for calibration
purposes. For more details please see chapter calibration.

iTHERM TrustSens

This thermometer is part of the compact thermometer line for hygienic and aseptic applications.

Differentiating factors when selecting a suitable thermometer

TM371 TM372

Metric version, all dimensions given in mm Imperial version, all dimensions given in inches

↓ ↓

Measuring principle Resistance thermometer (RTD)

These resistance thermometers use a Pt100 temperature sensor according to IEC 60751. The
temperature sensor is a temperature-sensitive platinum resistor with a resistance of 100 Ω at
0 °C (32 °F) and a temperature coefficient α = 0.003851 °C-1.

Thin film platinum resistance thermometers (TF): A ultrapure platinum layer, about 1 µm thick,
is applied by vapor deposition in a vacuum on a ceramic substrate and then structured
photolithographically. The platinum conductor paths formed in this way create the measuring
resistance. Additional covering and passivation layers are applied and reliably protect the thin
platinum layer from contamination and oxidation, even at high temperatures.

The primary advantages of thin film temperature sensors are their small sizes and good vibration
resistance.

A0031087

A0031088

Measuring system

Endress+Hauser offers a complete portfolio of optimized components for the temperature measuring
point – everything you need for the seamless integration of the measuring point into the overall
facility. This includes:

• Power supply unit/barrier

• Display units

• Overvoltage protection
For more information, see the brochure 'System Products and Data Managers - Solutions for the

loop' (FA00016K/EN)

Endress+Hauser 3

iTHERM TrustSens TM371, TM372

2 3

1

4 5

U

1

2

3

4

5

6

A0031089

 1 Example of application, measuring point layout with additional Endress+Hauser components

1

Installed iTHERM compact thermometer with HART® communication protocol

2 RIA15 loop powered process display - It is integrated in the current loop and displays the measuring signal or

HART® process variables in digital form. The process display unit does not require an external power supply.
It is powered directly from the current loop. More information on this can be found in the Technical
Information, see "Documentation", →  42.

3 Active barrier RN221N - The RN221N (24 V DC, 30 mA) active barrier has a galvanically isolated output for

supplying voltage to loop-powered transmitters. The universal power supply works with an input supply
voltage of 20 to 250 V DC/AC, 50/60 Hz, which means that it can be used in all international power grids.

More information on this can be found in the Technical Information, see "Documentation", →  42.
4 Commubox FXA195 for intrinsically safe HART® communication with FieldCare via the USB interface.
5 FieldCare is a FDT-based plant asset management tool from Endress+Hauser, more details see section

'accessories'. The acquired self-calibration data is stored in the device (1) and can be read using FieldCare.

This also enables an auditable calibration certificate to be created and printed.

Equipment architecture

Design Options

1: Wiring,
electrical
connection,
output signal
2: Transmitter
housing

3: Extension neck • Welded-in-place or removable

4: Process
connection
→  25

5: Protection tube • Versions with and without protection tube (insert in direct contact with

6: Insert Sensor model: thin-film Pt100 sensor (TF) with iTHERM TrustSens technology.

A0031106

Your benefits:



• Optimum protection even with high-pressure cleaning: As standard
IP67/68, optional IP69K protection

• M12, 4pin connector: cost and time savings as well as incorrect wiring
avoided

• Compact built-in transmitter (4 to 20 mA, HART®)

• Optional with iTHERM QuickNeck bayonet joint

Your benefits:



• iTHERM QuickNeck: tool-free removal of the compact thermometer

• IP69K protection: safety under extreme process conditions

More than 50 different versions.

process).

• Various diameters

• Various tip shapes (straight or reduced)

Your benefits:



• Risk and cost reduction thanks to Heartbeat technology

• Fully automated, traceable, inline self-calibration

• Automatized documentation, memory for the last 350 calibration
points

• Printable calibration certificate - audit proof

• No risk of unconformity or undetected failures

• International certifications and approvals

4 Endress+Hauser

iTHERM TrustSens TM371, TM372

Ub

30 V

780
530

250

12 V

0

24.2 V

17.75 V

Supply voltage (V DC)

Load (Ω)

Input

Measuring range

Output signal

Failure information

Load

Pt100 thin-film (TF) –40 to +160 °C (–40 to +320 °F)

Output

Analog output 4 to 20 mA

Digital output HART® protocol (revision 7)

Failure information as per NAMUR NE43:

Failure information is created if the measuring information is missing or not valid. A complete list of
all the errors occurring in the measuring system is created.

Underranging Linear decrease from 4.0 to 3.8 mA

Overranging Linear increase from 20.0 to 20.5 mA

Failure, e.g. sensor breakage, sensor short­circuit

Maximum possible HART® communication resistance

≤ 3.6 mA ("low") or ≥ 21 mA ("high"), can be selected
The "high" alarm setting can be set between 21.5 mA and
23 mA, thus providing the flexibility needed to meet the
requirements of various control systems.

Linearization/transmission behavior

Filter

Protocol-specific data

R

b max.

output)

= (U

- 12 V) / 0.023 A (current

b max.

Temperature-linear

1st order digital filter: 0 to 120 s, factory setting: 0 s (PV)

HART

Manufacturer ID 17 (0x11)

Device type ID 0x11CF

HART revision 7

Device description files (DTM, DD) Information and files at:

• www.endress.com/downloads

• www.fieldcommgroup.org

HART load Min. 250 Ω

A0032387-EN

Endress+Hauser 5

iTHERM TrustSens TM371, TM372

HART device variables Measured value for PV (primary value)

Temperature

Measured values for SV, TV, QV (secondary, tertiary and quaternary
variable)

• SV: Device temperature

• TV: Calibration counter

• QV: Calibration deviation

Supported functions • Additional transmitter status

• NE107 diagnostics

Startup behavior / wireless HART data

Supply voltage

Current consumption

Minimum start-up voltage 12 V

Start-up current 3.58 mA

Start-up time < 7 s, until the first valid measured value signal is present at the current

Minimum operating voltage 12 V

Multidrop current 4 mA

Lead time 0 s

DC

output

DC

Wiring

According to the 3-A Standard electrical connecting cables must be smooth, corrosion-resistant
and easy to clean.

Ub = 12 to 30 V

The device may only be powered by a power supply unit with a limited energy electric circuit in
accordance with UL/EN/IEC 61010-1 chapter 9.4 or Class 2 according to UL 1310, "SELV or
Class 2 cir-cuit".

• I = 3.58 to 23 mA

• Minimum current consumption: I = 3.58 mA, multi-drop mode I =4 mA

• Maximum current consumption: I ≤ 23 mA

DC

Electrical connection

To prevent any kind of damage from the device electronics, leave the pins 2 and 4 unconnected.
They are reserved for the connection of the configuration cable.

Do not tighten the M12 plug too much, in order to prevent damage to the device. Maximum
torque: 0.4 Nm (M12 knurl)

6 Endress+Hauser

iTHERM TrustSens TM371, TM372

M12x1

1

12...30 VDC
(4...20 mA)

3
0 V
(4...20 mA)

4

2

A

B

1 (BN) +

2 (WH)
3 (BU) -

4 (BK)

1

43

2

 2 Pin assignment of the device connecting socket

1 Power supply 12 to 30 VDC; current output 4 to 20 mA
2 Reserved for configuration cable

3 Power supply 0 VDC; current output 4 to 20 mA
4 Reserved for configuration cable

Device plug connection

A0030963

Overvoltage protection

Reference operating conditions

Internal calibration point

A0030965

 3 Pin assignment of the plug connector

1 Power supply +, wire color brown = BN
2 Connection of PC configuration cable, wire color white = WH
3 Power supply -, wire color blue = BU
4 Connection of PC configuration cable, wire color black = BK

Appropriate cord sets with straight or angle plugs are available as accessory.

To protect against overvoltage in the power supply and signal/communication cables for the
thermometer electronics, Endress+Hauser offers the HAW562 surge arrester for DIN rail mounting.

For more information see the Technical Information 'HAW562 Surge arrester' TI01012K

Performance characteristics

• Ambient temperature: 25 °C ± 5 °C (77 °F ± 9 °F)

• Supply voltage: 24 V

• 118 °C (244.4 °F) +1.2 K / –1.7 K

• Lowest possible calibration point = 116.3 °C (241.3 °F)

• Highest possible calibration point = 119.2 °C (246.6 °F)
The individual calibration point of each TrustSens device is indicated in the ex-works calibration

certificate enclosed with the shipment.

DC

Endress+Hauser 7

iTHERM TrustSens TM371, TM372

Measurement uncertainty

Long-term drift

The given uncertainty values include non-linearity and non-repeatability and correspond to 2σ (95%
confidence level according to the Gaussian distribution curve).

Uncertainty of self-calibration of digital output (HART® value) at the
calibration point.

Uncertainty of the
temperature sensor inclusive
digital output (HART® value)
at reference conditions in
delivery state.

Each iTHERM TrustSens



is calibrated and
matched by default
before shipment to
guarantee the given
accuracy.

Uncertainty of D/A converter (analog output current) 0.03 % of the measurement

Pt100 sensing element < 1000 ppm/1000 h

A/D converter (digital output - HART®) < 500 ppm/1000 h

D/A converter (analog output - current) < 100 ppm/1000 h

1) This would be detected by the self-calibration

Process temperature:
+20 to +135 °C (+68 to +275 °F)
+135 to +160 °C (+275 to +320 °F)
0 to +20 °C (+32 to +68 °F)
–20 to 0 °C (–4 to +32 °F)
–40 to –20 °C (–40 to –4 °F)

< 0.35 °C (0.63 °F)

< 0.22 °C (0.4 °F)
< 0.38 °C (0.68 °F)
< 0.27 °C (0.49 °F)
< 0.46 °C (0.83 °F)
< 0.8 °C (1.44 °F)

range

1)

1)

Influence of ambient temperature

Influence of supply voltage

Long-term drift decreases at an exponential rate over time. So it may not be extrapolated in a
linear way for time spans longer than the above given values.

A/D converter (digital output - HART®) at typical
operating conditions

A/D converter (digital output - HART®) at maximum
operating conditions

D/A converter (analog output - current) ≤ 30 ppm/°C (2σ), related to the deviation from the

< 0.05 K (0.09 °F)

< 0.15 K (0.27 °F)

reference temperature

Typical operating conditions

• Ambient temperature: 0 to +40 °C (+32 to +104 °F)

• Process temperature: 0 to +140 °C (+32 to +284 °F)

• Power supply: 18 to 24 V

DC

According to IEC 61298-2:

A/D converter (digital output - HART®) at typical
operating conditions

D/A converter (analog output - current) < 10 ppm/V

1) Related to the deviation from the reference supply voltage

< 15 ppm/V

1)

1)

Sample calculation with Pt100, measuring range +20 to +135 °C (+68 to +275 °F), ambient
temperature +25 °C (+77 °F), supply voltage 24 V:

Measured error digital 0.220 °C (0.396 °F)

Measured error D/A = 0.03 % x 150 °C (302 °F) 0.045 °C (0.081 °F)

Measured error digital value (HART): 0.220 °C (0.396 °F)

Measured error analog value (current output): √(Measured error digital² +

Measured error D/A²)

0.225 °C (0.405 °F)

8 Endress+Hauser

iTHERM TrustSens TM371, TM372

Sample calculation with Pt100, measuring range +20 to +135 °C (+68 to +275 °F), ambient
temperature +35 °C (+95 °F), supply voltage 30 V:

Measured error digital 0.220 °C (0.396 °F)

Measured error D/A = 0.03 % x 150 °C (302 °F) 0.045 °C (0.081 °F)

Influence of ambient temperature (digital) 0.050 °C (0.090 °F)

Influence of ambient temperature (D/A) = (35 °C - 25 °C) x (30 ppm/°C x 150 °C) 0.045 °C (0.081 °F)

Influence of supply voltage (digital) = (30 V - 24 V) x 15 ppm/V x 150 °C 0.014 °C (0.025 °F)

Influence of supply voltage (D/A) = (30 V - 24 V) x 10 ppm/V x 150 °C 0.009 °C (0.016 °F)

Response time

Measured error digital value (HART):

√(Measured error digital² + Influence of ambient temperature (digital)² + Influence
of supply voltage (digital)²

Measured error analog value (current output):

√(Measured error digital² + Measured error D/A² + Influence of ambient
temperature (digital)² + Influence of ambient temperature (D/A)² + Influence of
supply voltage (digital)² + Influence of supply voltage (D/A)²

Tests in water at 0.4 m/s (1.3 ft/s), according to IEC 60751; 10 K temperature step change. t63 / t

0.226 °C (0.407 °F)

0.235 °C (0.423 °F)

are defined as the time that passes until the instrument output reaches 63% / 90% of the new value.

Response time with heat transfer paste

Protection tube Shape of tip Insert t

6 mm (0.24 in) Reduced 4.3 mm (0.17 in) x 20 mm (0.79 in) 3 mm (0.12 in) 2.9 s 5.4 s

9 mm (0.35 in)

12.7 mm (¹⁄₂ in)

1) Between the insert and the protection tube.

Reduced 5.3 mm (0.21 in) x 20 mm (0.79 in) 3 mm (0.12 in) 2.9 s 5.4 s

Reduced 5.3 mm (0.21 in) x 20 mm (0.79 in) 3 mm (0.12 in) 2.9 s 5.4 s

Reduced 8 mm (0.31 in) x 32 mm (1.26 in) 6 mm (0.24 in) 10.9 s 24.2 s

1)

63

Straight 6 mm (0.24 in) 9.1 s 17.9 s

Straight 6 mm (0.24 in) 10.9 s 24.2 s

90

t

90

Response time without heat transfer paste

Protection tube Shape of tip Insert t

Without

protection tube

6 mm (0.24 in) Reduced 4.3 mm (0.17 in) x 20 mm (0.79 in) 3 mm (0.12 in) 7.4 s 17.3 s

9 mm (0.35 in)

12.7 mm (¹⁄₂ in)

Calibration

Reduced 5.3 mm (0.21 in) x 20 mm (0.79 in) 3 mm (0.12 in) 7.4 s 17.3 s

Reduced 5.3 mm (0.21 in) x 20 mm (0.79 in) 3 mm (0.12 in) 7.4 s 17.3 s

Reduced 8 mm (0.31 in) x 32 mm (1.26 in) 6 mm (0.24 in) 30.7 s 74.5 s

Calibration of thermometers

- 6 mm (0.24 in) 5.3 s 10.4 s

Straight 6 mm (0.24 in) 24.4 s 54.1 s

Straight 6 mm (0.24 in) 30.7 s 74.5 s

63

Calibration involves comparing the measured values of a device under test (DUT) with those of a
more precise calibration standard using a defined and reproducible measurement method. The aim is
to determine the deviation of the DUT's measured values from the true value of the measured
variable. Two different methods are used for thermometers:

• Calibration at fixed-point temperatures, e.g. at the freezing point of water at 0 °C,

• Comparison calibration against a precise reference thermometer.

The thermometer to be calibrated must display the fixed point temperature or the temperature of
the reference thermometer as accurately as possible. Temperature-controlled calibration baths or
special calibration furnaces with homogeneous distribution of temperature are typically used for

t

90

Endress+Hauser 9

iTHERM TrustSens TM371, TM372

thermometer calibrations. The DUT and the reference thermometer are placed closely together into
the bath or furnace at a sufficient depth.

The measurement uncertainty can increase due to heat conduction errors and short immersion
lengths. The existing measurement uncertainty is listed on the individual calibration certificate.

For accredited calibrations according to IEC/ISO 17025, the measurement uncertainty must not be
twice as high as the accredited measurement uncertainty of the laboratory. If the limit value is
exceeded, only a factory calibration can be carried out.

For manual calibration in calibration baths the maximum immersion length of the device
ranges from the sensor tip to the lower part of the electronic housing. Do not immerse the
housing into the calibration bath!

A0032391

Self-calibration

The self-calibration procedure uses the Curie temperature (Tc) of a reference material as a built-in
temperature reference. A self-calibration is performed automatically, when the process temperature
(Tp) falls below the nominal Curie Temperature (Tc) of the device. At the Curie temperature, a phase
change of the reference material takes place, which is associated with a change in its electrical
properties. The electronics automatically detects this change and simultaneously calculates the
deviation of the measured Pt100-temperature to the known, physically fixed Curie temperature. The
TrustSens thermometer is calibrated. A green flashing LED light indicates the ongoing self­calibration process. Subsequently the thermometer electronics stores the results of this calibration.
The calibration data can be read via an asset management software like FieldCare or DeviceCare. A
self-calibration certificate can be created automatically. This inline self calibration allows a
continuous and repeated monitoring of changes to the Pt100 sensor and to the electronics’
characteristics. As the inline calibration is being performed under real ambient or process conditions
(e.g. heating of electronics), the result is closer to reality than a sensor calibration under laboratory
conditions.

Process criteria for self-calibration

To ensure a valid self-calibration within the given measurement accuracy, the process temperature
characteristics needs to fulfil the criteria, which are checked by the device automatically. Based on
this, the device is ready to perform a self-calibration under the following conditions:
– Process temperature > calibration temperature +3 °C (5.4 °F) for 25 s before cooling down; t1 - t2.
– Cooling rate: 0.5 to 16.5 K/min (0.9 to 29.7 °F/min), while the process temperature crosses the

Curie temperature; t2 - t3 + 10 s.

The process temperature ideally declines continuously below 116 °C (240.8 °F). A valid self­calibration process is done when the green LED flashes with a frequency 5 Hz for 5 s.

10 Endress+Hauser

iTHERM TrustSens TM371, TM372

T / °C (°F)

t

123 °C
(253.4 °F)

> 25 s

< 116 °C (240.8 °F)

-16.5 K/min
(-29.7 °F/min)

t1

t2

1

t3

t3

116 °C
(240.8 °F)

-0.5 K/min
(-0.9 °F/min)

2

 4 Needed process temperature profile for self-calibration

1 Process temperature 123 °C (253.4 °F)
2 Allowed self-calibration range

A0032839

Insulation resistance

Orientation

Installation instructions

Calibration monitoring

Available in conjunction with Advanced Data Manager Memograph M (RSG45). →  42

Application package:

• Up to 20 devices can be monitored via the HART interface

• Self-calibration data displayed on screen or via the Web server

• Generation of a calibration history

• Creation of a calibration protocol as an RTF file directly at the RSG45

• Evaluation, analysis and further processing of the calibration data using "Field Data Manager"

(FDM) analysis software

Insulation resistance ≥ 100 MΩ at ambient temperature.

Insulation resistance between the terminals and the outer jacket is measured with a minimum
voltage of 100 V DC.

Installation

No restrictions. However, self-draining in the process must be guaranteed. If there is an opening to
detect leaks at the process connection, this opening must be at the lowest possible point.

The immersion length of the thermometer can influence the accuracy. If the immersion length is too
small then errors in the measurement are caused by heat conduction via the process connection. If
installing into a pipe then the immersion length should ideally be half of the pipe diameter.

Installation possibilities: Pipes, tanks or other plant components

Endress+Hauser 11

iTHERM TrustSens TM371, TM372

U

≥ 3°

≥ 3°

1

2

3

4

1

2

 5 Installation examples

1, 2 Perpendicular to flow direction, installed at a min. angle of 3° to ensure self-draining
3 On elbows
4 Inclined installation in pipes with a small nominal diameter
U Immersion length

A0031007

In the case of pipes with a small nominal diameter, it is advisable for the tip of the thermometer
to project well into the process so that it extends past the pipe axis. Installation at an angle (4)
could be another solution. When determining the immersion length or installation depth all the
parameters of the thermometer and of the medium to be measured must be taken into account
(e.g. flow velocity, process pressure).

 6 Process connections for thermometer installation in pipes with small nominal diameters

1

Varivent® process connection type N for DN40

2 Corner-piece or T-piece (illustrated) for weld-in as per DIN 11865 / ASME BPE 2012

A0031022

12 Endress+Hauser

iTHERM TrustSens TM371, TM372

1 2

3

4

R0.4 R0.4

Sensor with
milk pipe
connection

Sensor with Varivent
connection

Shaped
gasket

Companion
connection

O-ring

Groove
slip-on nut

Centering ring

Sealing

Companion
connection

Companion
connection

Gasket
(O-ring)

Welding boss

Leak detection hole

Vessel wall

 7 Detailed installation instructions for hygiene-compliant installation

1 Sanitary connection according to DIN 11851, only in connection with EHEDG-certified and self-centering

2
3 Clamp according to ISO 2852
4 Liquiphant-M G1" process connection, horizontal installation

A0011758-EN

sealing ring
Varivent® process connection for VARINLINE® housing

The counterpieces for the process connections and the seals or sealing rings are not included in
the scope of supply for the thermometer. Liquiphant M weld-in adapters with associated seal
kits are available as accessories.

Procedure in case of seal failure indicated by leak detection port:

• Disassembling of the thermometer, validated cleaning procedure of thread and and sealing

ring groove

• Replacement of the seal or sealing ring

• CIP after re-assembly
In the case of weld-in connections, exercise the necessary degree of care when performing the

welding work on the process side:

• Suitable welding material

• Flush-welded or with welding radius > 3.2 mm (0.13 in)

• No pits, folds, crevices or cracks

• Polished surface, Ra ≤ 0.76 µm (30 µin)
As a general rule, the thermometers should be installed in such a way that does not impact

their ability to be cleaned (the requirements of the 3-A Sanitary Standard must be observed).
The Varivent® and Liquiphant-M weld-in adapter and Ingold (+ weld-in adapter) connections
enable flush-mounted installation.

Environment

Ambient temperature range

Storage temperature range

Climate class

Endress+Hauser 13

Ambient temperature Ta–40 to +60 °C (–40 to +140 °F)

Maximum electronics
temperature T

–40 to +85 °C (–40 to +185 °F)

T = –40 to +85 °C (–40 to +185 °F)

As per IEC 60654-1, Class Dx

iTHERM TrustSens TM371, TM372

Degree of protection

Shock and vibration resistance

Electromagnetic compatibility (EMC)

• IP54 for the version without protection tube provided for installation in an existing protection tube

• IP67/68 for housing with LED status indication

• IP69K for housing without LED status indication and only if appropriate cord-set with M12x1
coupling is connected. →  40

The specified rating IP67/68 or IP69K for the compact thermometer is only assured when an
approved M12 connector with a suitable IP rating is installed according to its manual.

Endress+Hauser temperature sensors meet the requirements of IEC 60751 which specify shock and
vibration resistance of 3g in the range from 10 to 500 Hz. This also applies for the quick-fastening
iTHERM QuickNeck.

EMC to all relevant requirements of the IEC/EN 61326 - series and NAMUR Recommendation EMC
(NE21). For details, refer to the Declaration of Conformity. All tests were passed both with and
without ongoing HART® communication.

All EMC measurements were performed with a turn down (TD) = 5:1. Maximum fluctuations during
EMC- tests: < 1% of measuring span.

Interference immunity to IEC/EN 61326 - series, requirements for industrial areas.

Interference emission to IEC/EN 61326 - series, electrical equipment Class B.

Process

Process temperature range

Thermal shock

Process pressure range

T

P

Reference sensor defective if temperature range of –45 to +200 °C (–49 to +392 °F) is exceeded.
Temperature measurement continues, but selfcalibration is out of function.

Thermal shock resistance in CIP/SIP process with a temperature increase and decrease from
+5 to +130 °C (+41 to +266 °F) within 2 seconds.

The maximum static process pressure is limited by the process connection, see respective section.
→  25

It is possible to check the mechanical loading capacity as a function of the installation and
process conditions online in the TW Sizing Module for protection tubes in the Endress+Hauser
Applicator software. This is valid for DIN thermowell calculations. See 'Accessories' section.

Example of the permitted flow velocity depending on the immersion length and process
medium

The highest flow velocity tolerated by the thermometer diminishes with increasing immersion length
exposed to the stream of the fluid. In addition it is dependent on the diameter of the thermometer
tip, on the kind of process medium, on the process temperature and on the process pressure. The
following figures exemplify the maximum permitted flow velocities in water at a process pressure of
40 bar (580 PSI) and superheated steam at a process pressure of 6 bar (87 PSI).

–40 to +160 °C (–40 to +320 °F)

14 Endress+Hauser

iTHERM TrustSens TM371, TM372

L (mm)

A

10

20

30

40

50

60

70

80

90

100

200

300 400 500

v (m/s)

B

0

4 8 10 16 20

L (in)

0

30

65

100

130

160

200

230

260

290

v (ft/s)

600

0

2 6 12 14 18 22 24

 8 Permitted flow velocities, protection tube diameter 9 mm (0.35 in)

A Medium water at T = 50 °C (122 °F)
B Medium superheated steam at T = 160 °C (320 °F)
L Immersion length exposed to flow
v Flow velocity

Medium - state of

Gaseous or liquid (also with high viscosity, e.g. yogurt).

aggregation

Mechanical construction

Design, dimensions

Endress+Hauser 15

All dimensions in mm (in). The design of the thermometer depends on the protection tube version
used:

• Thermometer without a protection tube

• Diameter 6 mm (0.24 in)

• Diameter 9 mm (0.35 in)

• Diameter 12.7 mm (¹⁄₂ in)

• T-piece and corner-piece protection tube version as per DIN 11865 / ASME BPE 2012 for weld-in
Various dimensions, such as the immersion length U for example, are variable values and are

therefore indicated as items in the following dimensional drawings.

Variable dimensions:

Item Description

E Extension neck length, variable depending on the configuration or predefined for the version with

iTHERM QuickNeck

L Protection tube length (U+T)

B Protection tube bottom thickness: predefined, depends on protection tube version (see also the

individual table data)

T Length of protection tube shaft: variable or predefined, depends on protection tube version (see

also the individual table data)

A0032462

iTHERM TrustSens TM371, TM372

U

"31.5
(1.24)

71 (2.8)

U

E = 45

(1.77)

"31.5
(1.24)

"31.5
(1.24)

121 (4.76)

U

15 (0.6)

M24

x1.5

117 (4.61)

U

12 (0.47)

"31.5
(1.24)

G3/8"

U

"31.5
(1.24)

131 (5.16)

27 (1.06)

1 2 3 5

6

" ID

" ID " ID

" ID " ID

"31.5

(1.24)

121 (4.76)

" ID

"9

(0.35)

G¼“

U

E = 70 (2.56)

7

4

"31.5
(1.24)

121 (4.76)

" ID

"9

(0.35)

U

E

G3/8”

Item Description

U Immersion length: variable, depending on the configuration

⌀ID Insert diameter 6 mm (0.24 in) or 3 mm (0.12 in)

Without protection tube

For installation with compression fitting TK40 as process connection and the insert in direct contact with the process or in an existing
protection tube.

1 Thermometer without extension neck, for mounting with adjustable compression fitting TK40, spherically and cylindrically, only ⌀ID = 6 mm
2 Thermometer with extension neck, for mounting with compression fitting TK40 in fix position, only ⌀ID = 6 mm
3 Thermometer with compression fitting TK40 fixed by extension neck, connection thread M24x1.5, ⌀ID = 6 mm
4 Thermometer with neck tube TE411, G3/8" thread adapter nut
5 Thermometer with M24x1.5 female thread for protection tube connection, e.g. TT411, ⌀ID = 3 mm or 6 mm
6 Thermometer with G3/8" female thread for protection tube connection, e.g. TT411, ⌀ID = 3 mm or 6 mm
7 Thermometer with iTHERM QuickNeck top part for protection tube with QuickNeck connection, ⌀ID = 3 mm or 6 mm

Item Description

U

(protection

tube)

T

(protection

tube)

E Length of the extension neck at point of installation (provided one is available)

B

(protection

tube)

Immersion length of the protection tube available at point of installation

Shaft length of protection tube available at point of installation

Base thickness of protection tube

Pay attention to the following equations when calculating the immersion length U for immersion into a protection tube TT411 already
available:

Version 5 U = U

Version 3, 4, 6 and 7 U = U

(protection tube)

(protection tube)

+ T

(protection tube)

+ T

(protection tube)

+ E + 3 mm - B

+ 3 mm - B

(protection tube)

(protection tube)

A0031214

16 Endress+Hauser

iTHERM TrustSens TM371, TM372

!6

(0.24)

T

U

1

3

4

5

6

7

8

9

11

E = 34 (1.34)

117 (4.61)

131 (5.16)

15 (0.59)

E

T

U

2

B

10

With protection tube diameter 6 mm (0.24 in)

A0031254

1 Thermometer with extension neck and process connection as clamp version
2 Thermometer without extension neck and process connection as clamp version
3 Without process connection
4 Process connection version as spherical compression fitting TK40
5 Process connection version as metal sealing system M12x1
6 Process connection version as metal sealing system G½"
7 Process connection version as cylindrical weld-in adapter 12 x 40 mm
8 Process connection version as cylindrical weld-in adapter 30 x 40 mm
9 Process connection version as spherical-cylindrical weld-in adapter 30 x 40 mm
10 Process connection version as spherical weld-in adapter 25 x mm
11 Thermometer with quick-fastening iTHERM QuickNeck and process connection as sanitary connection (clamp

version)

G3/8" thread for protection tube connection

Item Version Length

Without extension neck -

Replaceable extenstion neck 9 mm (0.35 in) -

Extension neck E

Length of protection tube

1)

shaft T

iTHERM QuickNeck 34 mm (1.34 in)

Clamp DN12 according to ISO 2852 24 mm (0.94 in)

Clamp DN25/DN40 according to ISO 2852 21 mm (0.83 in)

Without process connection (only G3/8" thread), where
necessary with compression fitting TK40

Metal sealing system M12x1 46 mm (1.81 in)

Metal sealing system G½" 60 mm (2.36 in)

Cylindrical weld-in adapter 12 mm (0.47 in) 55 mm (2.17 in)

Cylindrical weld-in adapter 30 mm (1.18 in) 55 mm (2.17 in)

variable, depending
on the
configuration

12 mm (0.47 in)

Endress+Hauser 17

iTHERM TrustSens TM371, TM372

Item Version Length

Spherical-cylindrical weld-in adapter 58 mm (2.28 in)

Spherical weld-in adapter 47 mm (1.85 in)

Tri-clamp (0.5"-0.75") 24 mm (0.94 in)

Microclamp (DN8-18) 23 mm (0.91 in)

Sanitary connection DN25/DN32/DN40 according to DIN
11851

Immersion length U Independent of the version

Bottom thickness B Reduced tip 4.3 mm (0.17 in) 2 mm (0.08 in)

1) Depends on the process connection

29 mm (1.14 in)

Variable, depending
on the
configuration

18 Endress+Hauser

iTHERM TrustSens TM371, TM372

U

!9

(0.35)

T

U

T = 85

(3.35)

1

2

!9 (0.35)

B

B

!15 (0.6)

3 4 5 6 7 8

159 10 11 12 13

121 (4.76)

131 (5.16)

14

With protection tube diameter 9 mm (0.35 in)

1 Thermometer with extension neck, process connection as clamp version
2 Process connection version as cylindrical weld-in adapter 30 x 40 mm
3 Process connection version as spherical-cylindrical weld-in adapter 30 x 40 mm
4 Process connection version as spherical weld-in adapter 25 x mm
5 Process connection version as sanitary connection according to DIN 11851
6 Process connection version as aseptic pipe union according to DIN 11864-1 Form A
7 Process connection version as metal sealing system G½"
8 Process connection version as thread according to ISO 228 for Liquiphant weld-in adapter
9 Process connection version APV Inline
10

Process connection version Varivent
11 Process connection version Ingold connection
12 Process connection to SMS 1147
13 Process connection version Neumo Biocontrol
14 Process adapter D45
15 Thermometer with quick-fastening iTHERM QuickNeck and process connection, as clamp version for example

®

A0031343

Endress+Hauser 19

iTHERM TrustSens TM371, TM372

Item Version Length

Extension neck E No separate extension neck available -

Without quick-fastening iTHERM QuickNeck independent of the process connection 85 mm (3.35 in)

Without quick-fastening iTHERM QuickNeck in combination with Ingold connection
25 mm (0.98 in) x 46 mm (1.81 in)

With quick-fastening iTHERM QuickNeck, depending on the process connection:

SMS 1147, DN25 40 mm (1.57 in)

SMS 1147, DN38 41 mm (1.61 in)

SMS 1147, DN51 42 mm (1.65 in)

Varivent®, type F, D = 50 mm (1.97 in)
Varivent®, type N, D = 68 mm (2.67 in)

Varivent®, type B, D = 31 mm (1.22 in) 56 mm (2.2 in)

Thread G1" according to ISO 228 for Liquiphant weld-in adapter 77 mm (3.03 in)

Spherical-cylindrical weld-in adapter 70 mm (2.76 in)

Cylindrical weld-in adapter 67 mm (2.64 in)

Aseptic pipe union according to DIN11864-A, DN25

Length of protection
tube shaft T

Immersion length U Independent of the version

Bottom thickness B

Aseptic pipe union according to DIN11864-A, DN40

Sanitary connection according to DIN 11851, DN32

Sanitary connection according to DIN 11851, DN40

Sanitary connection according to DIN 11851, DN50

Clamp according to ISO 2852, DN12

Clamp according to ISO 2852, DN25 37 mm (1.46 in)

Clamp according to ISO 2852, DN40

Clamp according to ISO 2852, DN70

Microclamp (DN18) 47 mm (1.85 in)

Tri-clamp (0.75") 46 mm (1.81 in)

Ingold connection 25 mm (0.98 in) x 30 mm (1.18 in) 78 mm (3.07 in)

Ingold connection 25 mm (0.98 in) x 46 mm (1.81 in) 94 mm (3.7 in)

Metal sealing system G½" 77 mm (3.03 in)

APV-Inline, DN50 51 mm (2.01 in)

Reduced tip 5.3 mm (0.21 in)x 20 mm (0.79 in)

Straight tip

100 mm (3.94 in)

52 mm (2.05 in)

45 mm (1.77 in)

47 mm (1.85 in)

48 mm (1.89 in)

39 mm (1.54 in)Clamp according to ISO 2852, DN63.5

Variable, depending
on the configuration

2 mm (0.08 in)

20 Endress+Hauser

iTHERM TrustSens TM371, TM372

U

T

B

!12.7

(0.5)

B

T

U

43

1

5 6 7 8

E = 34 (1.34)

15 (0.59)

117 (4.61)

131 (5.16)

11 (0.43)

T

U

E

2

With protection tube diameter 12.7 mm (¹⁄₂ in)

A0031372

1 Thermometer with standard extension neck, thread and process connection as clamp version
2 Thermometer with extension neck and process connection as clamp version
3 Process connection version as cylindrical weld-in adapter  12.7 mm (½ in)
4 Process connection version as spherical weld-in adapter 25 mm (1 in)
5 Process connection version as sanitary connection according to DIN 11851
6 Thread according to ISO 228 for Liquiphant weld-in adapter
7

Process connection version Varivent

8 Thermometer with quick-fastening iTHERM QuickNeck and process connection, as clamp version for example

®

• G3/8" thread for protection tube connection

• Protection tube made from solid bar stock drilled for L ≤ 200 mm (7.87 in)

• Welded protection tube for L > 200 mm (7.87 in)

Item Version Length

Without extension neck -

9 mm (0.35 in) -

Extension neck E

Length of protection tube
shaft T

Immersion length U Independent of the process connection

Bottom thickness B

Replaceable extension neck

iTHERM QuickNeck 34 mm (1.34 in)

Weld-in adapter, cylindrical, 12.7 mm (¹⁄₂ in) 12 mm (0.47 in)

All other process connections 65 mm (2.56 in)

Reduced tip 5.3 mm (0.21 in)x 20 mm (0.79 in) 2 mm (0.079 in)

Reduced tip 8 mm (0.31 in)x 32 mm (1.26 in) 4 mm (0.16 in)

Straight tip 6 mm (0.24 in)

variable, depending on
the configuration

Variable, depending on
the configuration

Endress+Hauser 21

With tee- or elbow piece protection tube version

1

2

3

4

117 (4.61)

82.7 (3.26)

E

15 (0.6)

131 (5.16)

11 (0.43)

0.7 (0.03)

E = 34 (1.34)

!4.5 (0.18)

11 (0.43)

G3/8" G3/8"

iTHERM TrustSens TM371, TM372

1 Thermometer with extension neck and tee-piece protection tube
2 Version with tee-piece protection tube
3 Version with elbow piece
4 Thermometer with quick-fastening iTHERM QuickNeck and elbow piece protection tube

Item Version Length

Without extension neck -

Replaceable extension neck 9 mm (0.35 in) -

Extension neck E

iTHERM QuickNeck 34 mm (1.34 in)

Bottom thickness B Independent of the version 0.7 mm (0.03 in)

Immersion length U Independent of the version 82.7 mm (3.26 in)

variable, depending
on the
configuration

• Pipe sizes according to DIN11865 series A (DIN), B (ISO) and C (ASME BPE)

• Nominal diameters > DN25, with 3-A symbol

• IP69K protection class

• Material 1.4435+316L, Delta ferrite content <0.5%

• Temperature measurement range: –60 to +200 °C (–76 to +392 °F)

• Pressure range: PN25 according to DIN11865
Due to the small immersion length U in pipes with a small nominal diamter, the use of iTHERM

QuickSens inserts is recommended.

A0031515

22 Endress+Hauser

iTHERM TrustSens TM371, TM372

Possible combinations of the protection tube versions with the available process connections
and quick-fastening iTHERM QuickNeck

Process connection and size

Without process connection (for installation with
compression fitting)

Protection tube diameter

6 mm (0.24 in)

2)

9 mm (0.35 in) 12.7 mm (¹⁄₂ in)

 - - -

iTHERM QuickNeck for 9 mm

2)

(0.35 in)

Process adapter D45 -  - -

Weld-in adapter

Cylindrical 12.7 mm (0.5 in) - -  -

Cylindrical 30 x 40 mm

 - 



Cylindrical 12 x 40 mm - - -

Spherical-cylindrical 30 x 40 mm   - 

Spherical 25 mm (0.98 in)    -

Clamp according to ISO 2852

Microclamp/Tri-clamp DN18 (0.75 in)

-

 

DN12 - 21.3 

DN25 -38 (1 - 1.5 in)

   

DN40 - 51 (2 in)

DN63.5 (2.5 in)

-   

DN70 - 76.5 (3 in)

Sanitary connection according to DIN 11851

DN25



DN32, DN40

 

DN50 -

Aseptic pipe union according to DIN 11864-1 Form A

DN25, DN40 -  - 

Metal sealing system

M12x1



-

-

G½"  

Thread according to ISO 228 for Liquiphant weld-in adapter

G¾" for FTL31/33/20

G¾" for FTL50 -

-  

G1" for FTL50 

APV Inline

DN50 -  - 

Varivent

®

Type B, 31 mm; Type F, 50 mm ; Type N, 68 mm -   

Ingold connection

25 x 30 mm or 25 x 46 mm -  - 

SMS 1147

DN25, DN38, DN51 -  - 

1)



-



-

-

Endress+Hauser 23

iTHERM TrustSens TM371, TM372

Process connection and size

6 mm (0.24 in)

Protection tube diameter

2)

9 mm (0.35 in) 12.7 mm (¹⁄₂ in)

iTHERM QuickNeck for 9 mm

2)

(0.35 in)

Neumo Biocontrol

D25 PN16, D50 PN16, D65 PN16 -  - -

1) In the case of 6 mm (0.24 in) and 12.7 mm (½ in) diameters, the iTHERM QuickNeck is available for all process connection versions.

2) All versions available with iTHERM QuickNeck

Weight

Material

0.2 to 2.5 kg (0.44 to 5.5 lbs) for standard options.

The temperatures for continuous operation specified in the following table are only intended as
reference values for use of the various materials in air and without any significant compressive load.
The maximum operating temperatures can be reduced considerably in cases where abnormal
conditions such as high mechanical load occur or in aggressive media.

Recommended

Designation Short form

AISI 316L
(corresponds to

1.4404

X2CrNiMo17-13-2,
X2CrNiMo18-14-3

or 1.4435)

1.4435+316L, delta
ferrite < 1% or <

0.5%

With regard to analytical limits, the specifications of both materials (1.4435 and 316L)
are met simultaneously. In addition, the delta ferrite content of the wetted parts is
limited to <1% - including the welding seams (following Basel Standard II); or <0.5%

max. temperature
for continuous use
in air

650 °C (1 202 °F)

1)

Properties

• Austenitic, stainless steel

• High corrosion resistance in general

• Particularly high corrosion resistance in
chlorine-based and acidic, non-oxidizing
atmospheres through the addition of
molybdenum (e.g. phosphoric and
sulfuric acids, acetic and tartaric acids
with a low concentration)

• Increased resistance to intergranular
corrosion and pitting

1)

Surface roughness

1) Can be used to a limited extent up to 800 °C (1472 °F) for low compressive loads and in non-corrosive
media. Contact your Endress+Hauser sales team for further information.

Values for wetted surfaces:

1)

Mechanically polished surface Ra ≤ 0.76 µm (30 µin)

Mechanically polished surface

2)

Ra ≤ 0.38 µm (15 µin)

Mechanically polished surface and electropolished Ra ≤ 0.38 µm (15 µin)+ electropolished

1) Exception: internal welding seams of the tee- and elbow pieces

2) Not compliant with ASME BPE

24 Endress+Hauser

iTHERM TrustSens TM371, TM372

!d

U

U

U

h

!d

!d

h

!d

h

!d

1 2

3

4

5

U

T

U

T

T

T

h

A

B

U

!d

!D

1

2

R0.4

R0.4

!i

!a

Protection tube Process connections

All dimensions in mm (in).

For welding in

Type Version Dimensions Technical properties

Weld-in adapter

1: Cylindrical

2: Cylindrical

3: Cylindrical d x h = 30 mm (1.18 in) x 40 mm (1.57 in)

4: Spherical-

cylindrical

5: Spherical d = 25 mm (0.98 in)

1)

d = 12.7 mm (¹⁄₂ in), U = immersion length

from lower edge of thread,

T = 12 mm (0.47 in)

2)

d x h = 12 mm (0.47 in) x 40 mm (1.57 in),

T = 55 mm (2.17 in)

d x h = 30 mm (1.18 in) x 40 mm (1.57 in)

h = 24 mm (0.94 in)

• P

depends on the weld-in

max.

process

• 3-A marked and EHEDG
certification

• ASME BPE compliance

A0009569

1) For protection tube 12.7 mm (½ in)

2) For protection tube 6 mm (0.24 in)

Releasable process connection

Sanitary connection according to DIN 11851

1 Centering ring
2 Sealing ring

1)

Version

DN25

DN32 50 mm

Type Technical properties

• 3-A marked and EHEDG
certification (only with
EHEDG-certified and self­centering sealing ring).

• ASME BPE compliance

A0009561

Dimensions

D A B i a

44 mm

(1.73 in)

(1.97 in)

30 mm

(1.18 in)

36 mm

(1.42 in)

10 mm

(0.39 in)

10 mm

(0.39 in)

26 mm

(1.02 in)

32 mm

(1.26 in)

29 mm

(1.14 in)

35 mm

(1.38 in)

40 bar (580 psi)

40 bar (580 psi)

P

max.

Endress+Hauser 25

DN40 56 mm

!D

h

U

!d

!i

!a

!D

U

!d

!a

!d

U

!D

R0.8

R0.5

0.8 ± 0.1

2.16 ± 0.1

R1.2

R0.8

0.4

1.6

A

A: Microclamp

A: Tri-clamp

DN50 68 mm

1) Pipes in accordance with DIN 11850

iTHERM TrustSens TM371, TM372

Type Technical properties

(2.2 in)

(2.68 in)

42 mm

(1.65 in)

54 mm

(2.13 in)

10 mm

(0.39 in)

11 mm

(0.43 in)

38 mm
(1.5 in)

50 mm

(1.97 in)

41 mm

(1.61 in)

53 mm

(2.1 in)

40 bar (580 psi)

25 bar (363 psi)

Type Version

Aseptic pipe union according to DIN

11864-1, Form A

Type

Clamp according to ISO 2852

A0009562

DN8-18 (0.5"-0.75")

Tri-clamp DN8-18

Dimensions

d D i a h

DN25 26 mm

(1.02 in)

DN40 38 mm

(1.5 in)

42.9 mm
(1.7 in)

54.9 mm

(2.16 in)

26 mm

(1.02 in)

38 mm

(1.5 in)

29 mm

(1.14 in)

41 mm

(1.61 in)

9 mm

(0.35 in)

10 mm

(0.39 in)

Version Dimensions

1)

d:

Microclamp

2)

3)

D a

-

25 mm (0.98 in)

(0.5"-0.75")

DN12-21.3 34 mm (1.34 in)

DN25-38 (1"-1.5") 50.5 mm (1.99 in)

-

16 to 25.3 mm

(0.63 to 0.99 in)

29 to 42.4 mm

(1.14 to 1.67 in)

DN40-51 (2") 64 mm (2.52 in) 44.8 to 55.8 mm

(1.76 to 2.2 in)

DN63.5 (2.5") 77.5 mm (3.05 in) 68.9 to 75.8 mm

(2.71 to 2.98 in)

DN70-76.5 (3") 91 mm (3.58 in) > 75.8 mm (2.98 in) • P

Technical properties

• P

= 40 bar (580 psi)

max.

• 3-A marked and EHEDG
certification

• ASME BPE compliance

Technical properties

• P

= 16 bar (232 psi),

max.

depends on clamp ring and
suitable seal

• 3-A marked

• P

= 16 bar (232 psi),

max.

depends on clamp ring and
suitable seal

• 3-A marked and EHEDG
certification (combined with
Hyjoin PEEK/stainless steel
seal or Dupont de Nemours
Kalrez/stainless steel seal)

• ASME BPE compliance

= 16 bar (232 psi),

max.

depends on clamp ring and
suitable seal

• 3-A marked

• ASME BPE compliance

4)

A Different seal geometries for

1) Pipes in accordance with ISO 2037 and BS 4825 Part 1

2) Microclamp (not in ISO 2852); no standard pipes

3) DN8 (0.5") only possible with protection tube diameter = 6 mm (0.24 in)

4) Not for DN12-21.3

Microclamp and Tri-clamp

A0009566

26 Endress+Hauser

iTHERM TrustSens TM371, TM372

U

14

(0.55)

22 (0.87)

M12

1.5x

!10

(0.4)

8 (0.3)

!6

(¼)

G3/8"

T = 46 (1.81)

20°

U

14

(0.55)

37 (1.46)

G½”

!18

(0.71)

8 (0.31)

!6 (¼)

G3/8"

T = 60 (2.36)

22.5°

U

14

(0.55)

37 (1.46)

G½”

"18 (0.71)

8 (0.31)

"9 (0.35)

T

45°

U

35 (1.38)

20

(0.79)

5 (0.20)

!45 (1.77)

!50 (1.97)

U

L1

1

G

A

Metal sealing system

M12x1.5

Type Version Technical properties

G½"

P

= 16 bar (232 psi)

Protection tube diameter

6 mm (0.24 in)

max.

Maximum torque =



10 Nm (7.38 lbf ft)

A0009574

-

Type Version Technical properties

Process adapter

D45 • 3-A marked

A0020856

Protection tube diameter

9 mm (0.35 in)

A0009571

P

= 16 bar (232 psi)

max.

Maximum torque =



10 Nm (7.38 lbf ft)

• EHEDG certification

A0034881

Dimensions

Type Version G

Thread according to ISO 228 (for weld-in

adapter)

Endress+Hauser 27

A0009572

G¾" for

FTL31/33/20

adapter

G¾" for FTL50

adapter

G1" for FTL50-

adapter

L1 thread

length

16 mm

(0.63 in)

18.6 mm
(0.73 in)

A 1 (SW/AF)

25.5 mm (1 in) 32

29.5 mm
(1.16 in)

41

Technical properties

• P

= 25 bar (362 psi) at

max.

max. 150 °C (302 °F)

• P

= 40 bar (580 psi) at

max.

max. 100 °C (212 °F)

• 3-A marked and EHEDG
certification

• ASME BPE compliance

iTHERM TrustSens TM371, TM372

h

!d

M

!A

!B

U

U

!D

!B

!A

h

U

!D

!i

!a

Type Version

APV Inline

A0018435

Type Version

®

Varivent

d A B M h

DN50

69 mm

(2.72 in)

D A B h P

Type B 31 mm

(1.22 in)

Type F 50 mm

(1.97 in)

Type N 68 mm

(2.67 in)

Dimensions

Technical properties

• P

= 25 bar (362 psi)

99.5 mm
(3.92 in)

82 mm

(3.23 in)

2xM8

19 mm

(0.75 in)

max.

• 3-A marked and EHEDG
certification

• ASME BPE compliance

Dimensions Technical properties

max.

105 mm
(4.13 in)

145 mm
(5.71 in)

165 mm

(6.5 in)

- 22 mm

135 mm
(5.31 in)

155 mm

(6.1 in)

(0.87 in)

24 mm

(0.95 in)

24.5 mm
(0.96 in)

10 bar

(145 psi)

• 3-A marked and EHEDG
certification

• ASME BPE compliance

A0021307

The VARINLINE® housing connection flange is suitable for weld-in into the conical or torispherical head in tanks or containers with a small



diameter (≤ 1.6 m (5.25 ft)) and up to a wall thickness of 8 mm (0.31 in).

Type Technical properties

Varivent® for VARINLINE® housing for installation in pipes

• 3-A marked and EHEDG
certification

• ASME BPE compliance

A0009564

Dimensions

Version

D i a

P

max.

DN40: 38 mm (1.5 in) DN40: 41 mm (1.61 in)

DN50: 50 mm (1.97 in) DN50: 53 mm (2.1 in)

DN40 to DN65:

16 bar (232 psi)

DN65: 66 mm (2.6 in) DN65: 70 mm (2.76 in)

Type N, according to DIN

11866, series A

28 Endress+Hauser

68 mm (2.67 in)

DN80: 81 mm (3.2 in) DN80: 85 mm (3.35 in)

DN100: 100 mm (3.94 in) DN100: 104 mm (4.1 in)

DN125: 125 mm (4.92 in) DN125: 129 mm (5.08 in)

DN150: 150 mm (5.9 in) DN150: 154 mm (6.06 in)

DN80 to DN150:

10 bar (145 psi)

iTHERM TrustSens TM371, TM372

!D

!3.1
(0.12)

!4.5 (0.18)

G3/8”

L

!18 (0.71)

s

83 (3.26)

0.7 (0.03)

Version

Type N, according to EN

ISO 1127, series B

Type N, according to DIN

11866, series C

Type N, according to DIN

11866, series C

D i a

68 mm (2.67 in)

68 mm (2.67 in)

68 mm (2.67 in)

Advanced tee-piece (no welds, no dead legs)

Type Version

Tee-piece for weld-in as per DIN 11865

(part A, B and C)

A0035898

Dimensions

38.4 mm (1.51 in) 42.4 mm (1.67 in)

44.3 mm (1.75 in) 48.3 mm (1.9 in)

56.3 mm (2.22 in) 60.3 mm (2.37 in)

72.1 mm (2.84 in) 76.1 mm (3 in)

82.9 mm (3.26 in) 42.4 mm (3.5 in)

108.3 mm (4.26 in) 114.3 mm (4.5 in)

OD 1½": 34.9 mm (1.37 in) OD 1½": 38.1 mm (1.5 in)

OD 2": 47.2 mm (1.86 in) OD 2": 50.8 mm (2 in)

OD 2½": 60.2 mm (2.37 in) OD 2½": 63.5 mm (2.5 in)

OD 3": 73 mm (2.87 in) OD 3": 76.2 mm (3 in)

OD 4": 97.6 mm (3.84 in) OD 4": 101.6 mm (4 in)

D L s

Part A DN10 PN25 13 mm

(0.51 in)

DN15 PN25 19 mm

(0.75 in)

DN20 PN25 23 mm

(0.91 in)

DN25 PN25 29 mm

(1.14 in)

DN32 PN25 32 mm

(1.26 in)

Part B DN13,5 PN25 13.5 mm

(0.53 in)

DN17,2 PN25 17.2 mm

(0.68 in)

DN21,3 PN25 21.3 mm

(0.84 in)

DN26,9 PN25 26.9 mm

(1.06 in)

DN33,7 PN25 33.7 mm

(1.33 in)

Part

2)

C

DN12,7 PN25

(½")

DN19,05

PN25 (¾")

DN25,4 PN25

(1")

DN38,1 PN25

(1½")

12.7 mm
(0.5 in)

19.05 mm
(0.75 in)

25.4 mm

(1 in)

38.1 mm

(1.5 in)

Dimensions in mm (in)

48 mm

(1.89 in)

1)

1.5 mm

(0.06 in)

1.6 mm

(0.063 in)

2 mm

(0.08 in)

1.65 mm

(0.065 in)

P

max.

42.4 mm (1.67 in) to

60.3 mm (2.37 in):
16 bar (232 psi)

76.1 mm (3 in) to

114.3 mm (4.5 in):
10 bar (145 psi)

OD 1½" to OD 2½":

16 bar (232 psi)

OD 3" to OD 4": 10 bar (145 psi)

Technical properties

• P

= 25 bar (362 psi)

max.

• 3-A marked for > DN25

1) Wall thickness

2) Dimensions as per ASME BPE 2012

Endress+Hauser 29

Advanced elbow piece (no welds, no dead legs)

!D

!3.1
(0.12)

83 (3.26)

0.7 (0.03)

!4.5

(0.18)

G3/8”

L1

L2

!D

U

x

4

(0.16)

h

!D

G1¼“

iTHERM TrustSens TM371, TM372

Type Version

Elbow piece for weld-in as per DIN 11865

(part A, B and C)

A0035899

D L1 L2 s

Part A DN10 PN25 13 mm

(0.51 in)

DN15 PN25 19 mm

(0.75 in)

DN20 PN25 23 mm

(0.91 in)

DN25 PN25 29 mm

(1.14 in)

DN32 PN25 35 mm

(1.38 in)

Part B DN13,5

PN25

DN17,2

PN25

DN21,3

PN25

DN26,9

PN25

DN33,7

PN25

Part C DN12,7

PN25 (½")

DN19,05

PN25 (¾")

DN25,4

PN25 (1")

DN38,1

PN25 (1½")

2)

13.5 mm
(0.53 in)

17.2 mm
(0.68 in)

21.3 mm
(0.84 in)

26.9 mm
(1.06 in)

33.7 mm
(1.33 in)

12.7 mm
(0.5 in)

19.05 mm
(0.75 in)

25.4 mm

(1 in)

38.1 mm

(1.5 in)

Dimensions

24 mm

(0.95 in)

25 mm

(0.98 in)

27 mm

(1.06 in)

30 mm

(1.18 in)

33 mm
(1.3 in)

32 mm

(1.26 in)

34 mm

(1.34 in)

36 mm

(1.41 in)

29 mm

(1.14 in)

32 mm

(1.26 in)

24 mm

(0.95 in)

25 mm

(0.98 in)

28 mm
(1.1 in)

35 mm

(1.38 in)

1)

1.5 mm

(0.06 in)

1.6 mm

(0.063 in)

2.0 mm

(0.08 in)

1.65 mm

(0.065 in)

Technical properties

• P

= 25 bar (362 psi)

max.

• 3-A marked for > DN25

1) Wall thickness

2) Dimensions as per ASME BPE 2012

Type Version, dimensions D x h Technical properties

Ingold connection

25 mm (0.98 in) x 30 mm (1.18 in)

x = 1.5 mm (0.06 in)

25 mm (0.98 in) x 46 mm (1.81 in)

x = 6 mm (0.24 in)

A0009573

P

= 25 bar (362 psi)

max.

A seal is included in the
delivery
Material V75SR: FDA
compliant, 3-A compliant, USP
Class VI compliant

30 Endress+Hauser

iTHERM TrustSens TM371, TM372

U

1

2
3

h

!D

!A

U

h

!D

!A

M

!B

Type Version

SMS 1147 DN25 32 mm

DN38 48 mm

DN51 60 mm

A0009568

1 Thread adapter nut
2 Sealing ring
3 Counterpart connection

The counterpart connection must fit the sealing ring and fix it in place.



Type Version

Neumo Biocontrol

A0018497

D25

PN16

D50

PN16

D65

PN25

A B D d h

64 mm

(2.52 in)

90 mm

(3.54 in)

120 mm
(4.72 in)

Dimensions

D A h

35.5 mm

(1.26 in)

(1.89 in)

(2.36 in)

50 mm

(1.97 in)

70 mm

(2.76 in)

95 mm

(3.74 in)

(1.4 in)

55 mm

(2.17 in)

65 mm

(2.56 in)

Dimensions

30.4 mm
(1.2 in)

49.9 mm

(1.97 in)

67.9 mm

(2.67 in)

7 mm

(0.28 in)

9 mm

(0.35 in)

11 mm

(0.43 in)

7 mm (0.28 in)

8 mm (0.31 in)

9 mm (0.35 in)

20 mm

(0.79 in)

27 mm

(1.06 in)

Technical properties

P

= 6 bar (87 psi)

max.

Technical properties

• P

= 16 bar (232 psi)

max.

• 3-A marked

Endress+Hauser 31

Compression fitting

!di

!D

!di

!D

h

h

!d

!d

!7 (0.28)

2 (0.08)

20 (0.8)

D2 = !5.3

(0.21)

!3.2

(0.13)

2 (0.08)

40 (1.6)

20

(0.8)

D2 = !6.6

(0.26)

!4.1

(0.16)

2 (0.08)

20 (0.8)

D2 = !5.3

(0.21)

!3.2

(0.13)

2 (0.08)

6 (0.24)

D2 = !8

(0.31)

4

(1.6)

20 (0.8)

D2 = !4.3

(0.17)

2 (0.08)

2 31

!D1

!D1

!!D1 =

D2

!D1

!D1

!D1

!3.3

(0.13)

!8 (0.31) /

1

!6.6 (0.26)

32 (1.26)

!6.4

(0.25)

!!D1 =

D2

iTHERM TrustSens TM371, TM372

Type

Version Dimensions

Spherical or cylindrical di D h

Compression fitting TK40 for weld-in

Spherical

Ferrule material PEEK or

316L

Thread G¼"

Cylindrical

Ferrule material Elastosil®

Thread G½"

A0017582

1) All the pressure specifications apply for cyclic temperature load

2) For insert or protection tube diameter Ød = 6 mm (0.236 in).

6.3 mm

(0.25 in)

6.2 mm

(0.24 in)

9.2 mm

(0.36 in)

Technical properties

• P

= 10 bar (145 psi),

max.

T

= +150 °C (+302 °F) for

max.

PEEK material, tightening
torque = 10 Nm

• P

= 50 bar (725 psi),

25 mm

(0.98 in)

2)

30 mm

(1.18 in)

33 mm

(1.3 in)

57 mm

(2.24 in)

max.

T

= +200 °C (+392 °F) for

max.

316L material, tightening
torque = 25 Nm

• PEEK compression fitting is
EHEDG tested and 3-A
marked

• P

= 10 bar (145 psi)

max.

• T

for Elastosil® ferrule =

max.

+150 °C (+302 °F),
tightening torque = 5 Nm

• Elastosil® compression
fitting is EHEDG tested

1)

Tip shape

The thermal response time, the reduction of the flow cross-section and the mechanical load that
occurs in the process are the criteria that matter when selecting the shape of the tip. Advantages of
using reduced or tapered thermometer tips:

• A smaller tip shape has less impact on the flow characteristics of the pipe carrying the medium.

• The flow characteristics are optimized, thereby increasing the stability of the thermowell.

• Endress+Hauser offers users a range of thermowell tips to meet every requirement:
– Reduced tip with 4.3 mm (0.17 in) and 5.3 mm (0.21 in): walls of lower thickness

significantly reduce the response times of the overall measuring point.

– Tapered tip with 6.6 mm (0.26 in) and reduced tip with 8 mm (0.31 in): walls of greater

thickness are particularly well suited to applications with a higher degree of mechanical load or
wear (e.g. pitting, abrasion etc.).

32 Endress+Hauser

 9 Thermowell tips available (reduced, straight or tapered)

A0017174

iTHERM TrustSens TM371, TM372

1

Item No. Thermowell (D1) Insert (ID)

1) The thermowell is made from barstock for L ≤ 200 mm (7.87 in). The tip is welded on for L > 200 mm

2) For L ≤ 200 mm (7.87 in) = internal diameter 8 mm (0.31 in). For L > 200 mm (7.87 in) = internal

1 6 mm (¹⁄₄ in) Reduced tip 3 mm (¹⁄₈ in)

2 9 mm (0.35 in)

3 12.7 mm (¹⁄₂ in)

(7.87 in).

diameter 6.6 mm (0.26 in)

• Reduced tip with 5.3 mm (0.21 in)

• Straight tip

• Tapered tip with 6.6 mm (0.26 in)

• Reduced tip with 5.3 mm (0.21 in)

1)

• Straight tip

• Reduced tip with 8 mm (0.31 in)

2)

• 3 mm (¹⁄₈ in)

• 6 mm (¹⁄₄ in)

• 3 mm (¹⁄₈ in)

• 3 mm (¹⁄₈ in)

• 6 mm (¹⁄₄ in)

• 6 mm (¹⁄₄ in)

It is possible to check the mechanical loading capacity as a function of the installation and
process conditions online in the TW Sizing Module for thermowells in the Endress+Hauser
Applicator software. See 'Accessories' section.

Operability

Operating concept

Local operation LED signals

The configuration of device-specific parameters is done via the HART protocol or CDI interface (=
Endress+Hauser Common Data Interface). There are specific configuration or operating programs
from different manufacturers available to the user for this purpose. Both the DD (Device Description)
as well as the DTM (Device Type Manager) files are being provided for the iTHERM TrustSens
thermometers.

Self-calibration

A self-calibration certificate similar to laboratory calibration can be created with a DTM and can be
printed on demand. The necessary measurement data is stored in the device and can be requested by
the DTM.

Position LEDs Function description

LED for device status

1

indication

LED green (gn)
is illuminated

LED green (gn) is flashing

LED red (rd) and green
(gn) are flashing
alternating

A0031589

LED red (rd) is flashing Presence of a diagnostic event: "Warning"

LED red (rd) is illuminated Presence of a diagnostic event: "Alarm"

Voltage supply is correct. The device is
operational and the set limit values are met.

With a frequency 1 Hz: self-calibration
currently being performed.
With a frequency 5 Hz for 5 s: self-calibration
finished and valid, all process criteria were
within specifications. Calibration data stored.

Self-calibration process finished but not valid,
violation of necessary process criteria.
Calibration data not stored.

Operating elements

To prevent manipulation, no operating elements are present directly on the device. The thermometer
is configured only by remote operation.

Remote operation

Configuration

Configuration kits, e. g. Commubox FXA195 or TXU10, for PC-programmable thermometer with
setup software and interface for PC with USB port.

Endress+Hauser 33

iTHERM TrustSens TM371, TM372

HART® functions and device-specific parameters are configured by HART® communication or via the
interface of the device. There are special configuration tools like FieldCare or DeviceCare by Endress
+Hauser. For more information, contact your Endress+Hauser sales representative.

Operating tools

Operating tool Sources for obtaining the required device descriptions (DD) or device

type manager (DTM)

FieldCare
(Endress+Hauser)

DeviceCare
(Endress+Hauser)

FieldXpert SFX350, SFX370
(Endress+Hauser)

• www.endress.com → Download Area → Software

• DVD (contact Endress+Hauser)

www.endress.com → Download Area → Software

Use update function of handheld terminal

Certificates and approvals

CE mark

EAC mark

cCSAus

MTBF

Hygiene standard

Other standards and guidelines

The product meets the requirements of the harmonized European standards. As such, it complies
with the legal specifications of the EC directives. The manufacturer confirms successful testing of the
product by affixing to it the CE-mark.

The product meets the legal requirements of the EEU guidelines. The manufacturer confirms the
successful testing of the product by affixing the EAC mark.

The product complies with "CLASS 2252 05 - Process Control Equipment" and "CLASS 2252 85 ­Process Control Equipment - Certified to US Standards" requirements.

For the transmitter: 180 years - according to Siemens Standard SN29500

• EHEDG certification, type EL - CLASS I. Permitted process connections in accordance with EHEDG,
see 'Process connections' section →  25

• 3-A authorization no. 1144, 3-A sanitary standard 74-06. Permitted process connections in
accordance with 3-A, see also 'Process connections' section

• ASME BPE, certificate of conformity can be ordered for indicated options

• FDA-compliant

• All product contact surfaces are produced without materials used derived from bovine or other
animal sources (TSE Certificate of Suitability)

• IEC 60529: Degrees of protection provided by enclosures (IP code)

• IEC 61010-1: Safety requirements for electrical equipment for measurement, control and
laboratory use

• IEC 60751: Industrial platinum resistance thermometers

• DIN 43772: Protection tubes

Parts in contact with the medium

Parts of the thermometer in contact with the medium comply with the following European
regulations:

• (EC) No. 1935/2004, Article 3, paragraph 1, Articles 5 and 17 on materials and articles intended
to come into contact with food.

• (EC) No. 2023/2006 on good manufacturing practice for materials and articles intended to come
into contact with food.

• (EU) No. 10/2011 on plastic materials and articles intended to come into contact with food.

CRN approval

The CRN approval is only available for certain options of protection tubes. These will be marked and
shown during the configuration of this device.

34 Endress+Hauser

iTHERM TrustSens TM371, TM372

Detailed ordering information is available from the following sources:

• In the download area on the Endress+Hauser website: www.endress.com → Select your country →
Downloads → Enter product code or device → Media type: Approvals & certificates → Select type of
approval → Start search

• From your nearest Endress+Hauser sales organization: www.addresses.endress.com

Surface purity

Material resistance

Material certification

Calibration

Protection tube testing and load capacity calculation

Cleaned from oil and grease for O2 applications, optional

Material resistance - including housing - to the following cleaning agents/disinfectants from the
company Ecolab: P3-topax 66, P3-topactive 200, P3-topactive 500 and P3-topactive OKTO as well as
demineralized water.

The material certificate 3.1 (according to standard EN 10204) can be requested separately. The
"short form" certificate includes a simplified declaration with no enclosures of documents related to
the materials used in the construction of the single sensor and guarantees the traceability of the
materials through the identification number of the thermometer. The data related to the origin of
the materials can subsequently be requested by the client if necessary.

The "Factory calibration" is carried out according to an internal procedure in a laboratory of Endress
+Hauser accredited by the European Accreditation Organization (EA) to ISO/IEC 17025. A
calibration which is performed according to EA guidelines (SIT/Accredia) or (DKD/DAkkS) may be
requested separately.

The analog current output of the device is calibrated.

• Protection tube pressure tests are carried out in accordance with the specifications in DIN 43772.
With regard to protection tubes with tapered or reduced tips that do not comply with this
standard, these are tested using the pressure of corresponding straight protection tubes. Tests
according to other specifications can be carried out on request.

• Load capacity calculation for the protection tube as per DIN43772

Heartbeat diagnostics

Ordering information

Detailed ordering information is available from the following sources:

• In the Product Configurator on the Endress+Hauser website: www.endress.com -> Click "Corporate"

-> Select your country -> Click "Products" -> Select the product using the filters and search field ->
Open product page -> The "Configure" button to the right of the product image opens the Product
Configurator.

• From your Endress+Hauser Sales Center: www.addresses.endress.com

Product Configurator - the tool for individual product configuration

• Up-to-the-minute configuration data

• Depending on the device: Direct input of measuring point-specific information such as
measuring range or operating language

• Automatic verification of exclusion criteria

• Automatic creation of the order code and its breakdown in PDF or Excel output format

• Ability to order directly in the Endress+Hauser Online Shop

Application packages

Available in all device versions.

Function

• Continuous self-monitoring of the device

• Diagnostic messages output to:
– the local display
– an asset management system (e.g. FieldCare/DeviceCare)
– an automation system (e.g. PLC)

Endress+Hauser 35

iTHERM TrustSens TM371, TM372

Advantages

• Device condition information is available immediately and processed in time.

• The status signals are classified in accordance with VDI/VDE 2650 and NAMUR recommendation
NE 107 and contain information about the cause of the error and remedial action.

For detailed information on Heartbeat functions, see the Operating Instructions →  42

Heartbeat verification

Heartbeat Monitoring

Available in all device versions.

Device functionality checked on demand

• Verification of the correct functioning of the measuring device within specifications

• The verification result provides information about the condition of the device: "Passed" or "Failed"

• The results are documented in a verification report

• The automatically generated report supports the obligation to demonstrate compliance with
internal and external regulations, laws and standards

• Verification is possible without interrupting the process

Advantages

• No onsite presence is required to use the function

• The DTM

1)

triggers verification in the device and interprets the results. No specific knowledge is

required on the part of the user.

• The verification report can be used to prove quality measures to a third party.

• Heartbeat Verification can replace other maintenance tasks (e.g. periodic check) or extend the test
intervals.

For detailed information on Heartbeat functions, see the Operating Instructions →  42

Available in all device versions.

Function

Calibration information is logged in addition to the verification parameters. 350 calibration points
are saved in the device (FIFO memory).

Advantages

• Early detection of changes (trends) to ensure plant availability and product quality.

• Use of information for the proactive planning of measures (e.g. maintenance).

For detailed information on Heartbeat functions, see the Operating Instructions →  42

1) Device Type Manager: controls device operation via DeviceCare, FieldCare or a DTM-based process control system.

36 Endress+Hauser

iTHERM TrustSens TM371, TM372

!30 (1.18)

16 (0.63)

34 (1.34)

15 (0.6)

G½”

M12x1.5

!7.6 (0.3)

!20 (0.8)

13 (0.51)

17 (0.67)

8 (0.31)

!18

(0.71)

G½”/
M12x1.5

37 (1.46)

AF22

G 1¼”

50 (1.97)

Accessories

Device-specific accessories

Device-specific accessories

Accessories Description

Welding boss with sealing taper (metal -

metal)

Welding boss for G½" and M12x1.5 thread
Metal-sealing; conical
Material of wetted parts: 316L/1.4435
Max. process pressure 16 bar (232 PSI)

Order number:

• 60021387 (G½")

• 71405560 (M12x1.5)

A0006621

A0018236

Dummy plug

A0009213-EN

Weld-in adapter for Ingold process

connections

Dummy plug for G½” or M12x1.5 conical metal-sealing welding boss
Material: SS 316L/1.4435

Order number:

• 60022519 (G½")

• 60021194 (M12x1.5)

Material of wetted parts: 316L/1.4435
Weight: 0.32 kg (0.7 lb)
Order number: 60017887

O-ring seal set

• Silicone O-ring in accordance with FDA CFR 21

• Maximum temperature: 230 °C (446 °F)

• Order number: 60018911

A0008956

Endress+Hauser 37

iTHERM TrustSens TM371, TM372

ø

26 (1.0)

25 (1.0)

ø

29 (1.1)

30 (1.2)

G

ISO 228

¾"

ø32 (1.3)

ø

50 (2.0)

26 (1.0)
21 (0.8)

ø

32 (1.3)

G ¾

ISO 228

"

26 (1.0)

ø

55 (2.2)

21 (0.8)

ø

32 (1.3)

G ¾

ISO 228

"

ø50 (2.0)

ø53 (2.1)

47.8 (1.9)

24.6 (1.0)

30°

21 (0.8)

ø41 (1.6)

G 1"

ISO 228

Weld-in adapter for FTL31/33/20,

pipe-mounting

A0008265

1) A seal is included in the delivery.

Weld-in adapter for FTL31/33/20,

vessel-mounting

G¾", d=29 mm, without flange
Material: 316L
Roughness in μm (μin): 1.5 (59.1)
Order number: 52028295 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52021717
compliant

G¾", d=50 mm, with flange
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 52018765 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52021717
compliant
EHEDG tested and 3-A marked

1)

, FDA-

1)

, FDA-

A0008810

1) A seal is included in the delivery.

Weld-in adapter for FTL50

A0008274

1) A seal is included in the delivery.

Weld-in adapter for FTL50

G¾", d=55 mm, with flange
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 52001052 (without inspection certificate
EN10204-3.1 material)
Order number: 52011897 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52014473
compliant
Order number weld-in dummy: MVT2L0692
EHEDG tested and 3-A marked

G1", d=53 mm, without flange
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 71093129 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52014472
compliant
Order number weld-in dummy: MVT2L0691

1)

, FDA-

1)

, FDA-

38 Endress+Hauser

1) A seal is included in the delivery.

A0011927

iTHERM TrustSens TM371, TM372

ø41 (1.6)

G 1"

ISO 228

ø60 (2.4)

29.6 (1.2)

24.6 (1.0)

26 (1.02)

5 (0.2)

ø65 (2.56)

!D

20 (0.79)

35 (1.38)

Weld-in adapter for FTL50

A0008267

1) A seal is included in the delivery.

Weld-in adapter for FTL50

G1", d=60 mm, with flange
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 52001051 (without inspection certificate
EN10204-3.1 material)
Order number: 52011896 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52014472
compliant
Order number weld-in dummy: MVT2L0691
EHEDG tested and 3-A marked

G1", can be aligned
Material: 316L
Roughness in μm (μin): 0.8 (31.5)
Order number: 52001221 (without inspection certificate
EN10204-3.1 material)
Order number: 52011898 (with inspection certificate EN10204-3.1
material)
Order number seal (5-pc. set): silicone O-ring 52014424
compliant
Order number weld-in dummy: M40167

1)

, FDA-

1)

, FDA-

A0008272

1) A seal is included in the delivery.

Flexible handle cap to cover the

QuickNeck bottom part

Diameter ⌀D: 24 to 26 mm (0.94 to 1.02 in)
Material: Thermoplastic polyolefin - elastomer (TPE), free from
plasticizers
Maximum temperature: +150 °C (+302 °F)
Order number: 71275424

A0027201

Maximum process pressure for the weld-in adapters:

• 25 bar (362 PSI) at maximum 150 °C (302 °F)

• 40 bar (580 PSI) at maximum 100 °C (212 °F)
For more information on the weld-in adapters, see Technical Information (TI00426F/00).

Endress+Hauser 39

iTHERM TrustSens TM371, TM372

USB

FieldCare/
DeviceCare

USB

USB
driver

1

2 (WH) nc

2

1 (BN) +

4

3 (BU) -

3

4 (BK) nc

1

2 (WH) nc

2

1 (BN) +

4

3 (BU) -

3

4 (BK) nc

A

B

USB
drivers

Communication-specific accessories

Configuration kit TXU10

Commubox FXA291

Cordset M12x1, angle plug

Configuration kit for CDI communication with PC-programmable
devices. Includes interface cable for PC with USB port and M12x1
coupling (Non-Ex area).
Order code: TXU10-BD

A0028635

Connects Endress+Hauser field devices with a CDI interface (=
Endress+Hauser Common Data Interface) and the USB port of a
computer or laptop (Non-Ex area and Ex area).

For details, see "Technical Information" TI00405C



A0034600

PVC cable, 4 x 0.34 mm² (22 AWG) with M12x1 coupling; angle
plug; screw plug; length 5 m (16.4 ft); IP69K
Order number: 52024216

Core colours:

• 1 = BN brown

• 2 = WH white

• 3 = BU blue

• 4 = BK black

A0020723

Cordset M12x1, straight

PVC cable, 4 x 0.34 mm² (22 AWG) with M12x1 coupling nut from
stainless steel; straight female connector type; screw plug; length 5
m (16.4 ft); IP69K
Order number: 71217708

Core colors:

• 1 = BN brown

• 2 = WH white

• 3 = BU blue

A0020725

• 4 = BK black

Commubox FXA195 HART

For intrinsically safe HART communication with FieldCare via the
USB interface.

For details, see "Technical Information" TI00404F



A0032846

HART Loop Converter HMX50 Is used to evaluate and convert dynamic HART process variables to

analog current signals or limit values.

For details, see "Technical Information" TI00429F and



Operating Instructions BA00371F

Fieldgate FXA320 Gateway for the remote monitoring of connected 4-20 mA

measuring devices via a Web browser.

For details, see "Technical Information" TI00025S and



Operating Instructions BA00053S

Fieldgate FXA520 Gateway for the remote diagnostics and remote configuration of

connected HART measuring devices via a Web browser.

For details, see "Technical Information" TI00025S and



Operating Instructions BA00051S

40 Endress+Hauser

iTHERM TrustSens TM371, TM372

Field Xpert SFX350, 370 • Field Xpert is a powerful, compact industrial PDA based on the

Windows Embedded Handheld operating system and offering
integrated WLAN, USB, Bluetooth and infrared interfaces. This
allows it to be connected to HART and/or FOUNDATION Fieldbus
devices via a modem or gateway.

• SFX350 for configuration of field devices in Non-Ex areas

• SFX370 for configuration of field devices in Non-Ex areas and Ex
areas

For details, see Operating Instructions BA01202S



Service-specific accessories

Accessories Description

Applicator Software for selecting and sizing Endress+Hauser measuring devices:

• Calculation of all the necessary data for identifying the optimum measuring
device: e.g. pressure loss, accuracy or process connections.

• Graphic illustration of the calculation results

Administration, documentation and access to all project-related data and
parameters over the entire life cycle of a project.

Applicator is available:
Via the Internet: https://portal.endress.com/webapp/applicator

Configurator Product Configurator - the tool for individual product configuration

• Up-to-the-minute configuration data

• Depending on the device: Direct input of measuring point-specific information
such as measuring range or operating language

• Automatic verification of exclusion criteria

• Automatic creation of the order code and its breakdown in PDF or Excel output
format

• Ability to order directly in the Endress+Hauser Online Shop

The Configurator is available on the Endress+Hauser website: www.endress.com ->
Click "Corporate" -> Select your country -> Click "Products" -> Select the product
using the filters and the search field -> Open the product page -> The "Configure"
button to the right of the product image opens the Product Configurator.

W@M Life cycle management for your plant

W@M supports you with a wide range of software applications over the entire
process: from planning and procurement, to the installation, commissioning and
operation of the measuring devices. All the relevant device information, such as
the device status, spare parts and device-specific documentation, is available for
every device over the entire life cycle.
The application already contains the data of your Endress+Hauser device. Endress
+Hauser also takes care of maintaining and updating the data records.

W@M is available:
Via the Internet: www.endress.com/lifecyclemanagement

FieldCare SFE500 FDT-based plant asset management tool from Endress+Hauser.

It can configure all smart field units in your system and helps you manage them. By
using the status information, it is also a simple but effective way of checking their
status and condition.

For details, see Operating Instructions BA00027S and BA00065S



DeviceCare SFE100 Configuration tool for devices via fieldbus protocols and Endress+Hauser service

protocols.
DeviceCare is the tool developed by Endress+Hauser for the configuration of
Endress+Hauser devices. All smart devices in a plant can be configured via a point­to-point or point-to-bus connection. The user-friendly menus enable transparent
and intuitive access to the field devices.

For details, see Operating Instructions BA00027S



Endress+Hauser 41

iTHERM TrustSens TM371, TM372

System components

Advanced Data Manager
Memograph M

RN221N Active barrier with power supply for safe separation of 4-20 mA standard signal

RNS221 Supply unit for powering two 2-wire measuring devices in the non-Ex area.

The Advanced Data Manager Memograph M is a flexible and powerful system for
organizing process values. The measured process values are clearly presented on
the display and logged safely, monitored for limit values and analyzed. Via
common communication protocols, the measured and calculated values can be
easily communicated to higher-level systems or individual plant modules can be
interconnected.

For details, see Technical Information TI01180R/09



circuits. Offers bidirectional HART transmission.

For details, see "Technical Information" TI00073R and Operating Instructions



BA00202R

Bidirectional communication is possible via the HART communication jacks.

For details, see "Technical Information" TI00081R and Brief Operating



Instructions KA00110R

Documentation

• iTHERM TrustSens TM371, TM372 operating instructions (BA01581T/09) and associated printed
brief operating instructions (KA01272T/09)

• Components of the application example:
– RIA15 loop powered process display - Technical information (TI01043K/09)
– Active barrier RN221N - Technical information (TI00073R/09)

42 Endress+Hauser

www.addresses.endress.com