Endress+Hauser TM401 Specifications

TI01058T/09/EN/04.18
71419895
2018-03-30

Products

Solutions Services

Technical Information

iTHERM TM401

Resistance thermometer for hygienic and aseptic
applications

Metric version with basic technology
for all standard applications, permanent insert

Applications

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

• Measuring range: –50 to +200 °C (–58 to +392 °F)

• Pressure range up to 50 bar (725 psi)

• Protection class: up to IP69K

• Can be used in non-hazardous areas

Head transmitter

All Endress+Hauser transmitters are available with enhanced accuracy and reliability
compared to directly wired sensors. Easy customizing by choosing one of the
following outputs and communication protocols:

Analog output 4 to 20 mA, HART

Your benefits

• Excellent value for money and fast delivery

• User-friendly and reliable from product selection to maintenance

• International certification: hygiene standards as per 3-A®, EHEDG, ASME BPE,
FDA, TSE Certificate of Suitability

• Wide range of process connections

®

Function and system design

mm

inch

mm

inch

iTHERM TM401

iTHERM Hygiene line

This thermometer is part of the product line of modular thermometers for hygienic and aseptic
applications.

Differentiating factors when selecting a suitable thermometer

TM4x1 TM4x2

Metric version Imperial version

↓ ↓

TM41x characterizes the device that uses cutting-edge technology, with features such as a replaceable insert,

quick-fastening extension neck (iTHERM QuickNeck), vibration-resistant and fast-response sensor technology

(iTHERM StrongSens and QuickSens) and approval for use in hazardous areas

TM411

TM412

↓ ↓

TM40x characterizes the device that uses basic technology, with features such as a fixed, non-replaceable

insert, application in non-hazardous areas, standard extension neck, low-cost unit

TM401

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.

A0018239

A0018692

A0018691

TM402

A0018693

2 Endress+Hauser

iTHERM TM401

Commubox

FieldCare

1

PLC

°C

2

3

There are generally two different kinds of platinum resistance thermometers:

• Wire wound (WW): Here, a double coil of fine, high-purity platinum wire is located in a ceramic
support. This is then sealed top and bottom with a ceramic protective layer. Such resistance
thermometers not only facilitate very reproducible measurements but also offer good long-term
stability of the resistance/temperature characteristic within temperature ranges up to
600 °C (1 112 °F). This type of sensor is relatively large in size and it is comparatively sensitive to
vibrations.

• Thin film platinum resistance thermometers (TF): A very thin, ultrapure platinum layer,
approx. 1 μm thick, is vaporized 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 over wire wound versions are their smaller
sizes and better vibration resistance. A relatively low principle-based deviation of the resistance/
temperature characteristic from the standard characteristic of IEC 60751 can frequently be observed
among TF sensors at high temperatures. As a result, the tight limit values of tolerance category A as
per IEC 60751 can only be observed with TF sensors at temperatures up to approx. 300 °C (572 °F).
For this reason, thin-film sensors are generally only used for temperature measurements in ranges
below 400 °C (752 °F).

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 Components - Solutions for a Complete
Measuring Point' (FA00016K/EN)

A0017693

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

1

Installed iTHERM resistance thermometer with integrated HART® head transmitter

2 RIA16 field display unit - The display unit records the analog measuring signal from the head transmitter and

shows this on the display. The LC display shows the current measured value in digital form and as a bar graph
indicating a limit value violation. The display unit is looped into the 4 to 20 mA circuit and gets the required
energy from there. More information on this can be found in the Technical Information, see "Documentation",
→  26.

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", →  26.

Endress+Hauser 3

Input

iTHERM TM401

Measured variable

Measuring range

Output signal

Family of temperature transmitters

Temperature (temperature-linear transmission behavior)

Sensor type Measuring range

Pt100 thin-film –50 to +200 °C (–58 to +392 °F)

Output

Generally, the measured value can be transmitted in one of two ways:

• Directly-wired sensors - sensor measured values forwarded without a transmitter.

• Via all common protocols by selecting an appropriate Endress+Hauser iTEMP temperature
transmitter. All the transmitters listed below are mounted directly in the terminal head and wired
with the sensory mechanism.

Thermometers fitted with iTEMP transmitters are an installation-ready complete solution to
improve temperature measurement by significantly increasing accuracy and reliability, when
compared to direct wired sensors, as well as reducing both wiring and maintenance costs.

PC programmable head transmitters

They offer a high degree of flexibility, thereby supporting universal application with low inventory
storage. The iTEMP transmitters can be configured quickly and easily at a PC. Endress+Hauser offers
free configuration software which can be downloaded from the Endress+Hauser Website. More
information can be found in the Technical Information.

HART® programmable head transmitters

The transmitter is a 2-wire device with one or two measuring inputs and one analog output. The
device not only transfers converted signals from resistance thermometers and thermocouples, it also
transfers resistance and voltage signals using HART® communication. It can be installed as an
intrinsically safe apparatus in Zone 1 hazardous areas and is used for instrumentation in the
terminal head (flat face) as per DIN EN 50446. Swift and easy operation, visualization and
maintenance by PC using operating software, Simatic PDM or AMS. For more information, see the
Technical Information.

Advantages of the iTEMP transmitters:

• Dual or single sensor input (optionally for certain transmitters)

• Unsurpassed reliability, accuracy and long-term stability in critical processes

• Mathematical functions

• Monitoring of the thermometer drift, sensor backup functionality, sensor diagnostic functions

• Sensor-transmitter matching for dual sensor input transmitter, based on Callendar/Van Dusen
coefficients

Wiring

• According to the 3-A® Standard electrical connecting cables must be smooth, corrosion­resistant and easy to clean.

• Grounding or shield connections are possible via special ground terminals on the terminal
head.

4 Endress+Hauser

iTHERM TM401

3

5

6

RTD

3

4

5

6

RTD

1

2

3-wire

4-wire

Power supply
head transmitter and
analog output 4 to 20 mA,
or bus connection

(red) (red)
(red) (red)

(white) (white)

(white)

mA

1 x Pt 100

1 x Pt 100

red

red

white

4 wires 3 wires

red

white

red

white

1 BN
2 GNYE
3 BU
4 GY

1

4 3

2

Wiring diagrams for RTD

Type of sensor connection

Head mounted transmitter TMT18x (single input)

A0016433-EN

Terminal block mounted

Cable entries

Connector

Endress+Hauser 5

See the 'Terminal head' section

PIN assignment of the M12 connectors, connection combinations

Electrical connection (terminal head)

1x TMT 4 to 20 mA or

Connector M12 connector 4‐pin

PIN number 1 2 3 4

Flying leads Not connected (not insulated)

3-wire terminal block

(1x Pt100)

WH

RD RD

4-wire terminal block

(1x Pt100)

®

HART

+ i - i

WH WH

PIN position and color

code

A0019262-EN

A0018929

iTHERM TM401

Abbreviations

i RD WH BN GNYE BU GY

Insulated

1) Wires marked 'i' are not connected and are insulated with heat shrink tubes.

1)

Red White Brown Green-

yellow

Blue Gray

Overvoltage protection

Reference conditions

Accuracy

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
and the HAW569 for field housing installation.

For more information see the Technical Information 'HAW562 Surge arrester' TI01012K and
'HAW569 Surge arrester' TI01013K.

Performance characteristics

These data are relevant for determining the accuracy of the temperature transmitters used. More
information on this can be found in the Technical Information of the iTEMP temperature
transmitters. →  26

RTD resistance thermometer as per IEC 60751

Class Max. tolerances (°C)

Cl. AA, former 1/3 Cl. B ± (0.1 + 0.0017 · |t|

Cl. A ± (0.15 + 0.002 · |t|)

Cl. B ± (0.3 + 0.005 · |t|)

Temperature range for compliance with the tolerance classes

Thin-film version (TF): Cl. A –30 to +200 °C

1)

)

6 Endress+Hauser

iTHERM TM401

A

AA

-200 -100 0 100 200 300 400 500 600°C

0.5

1.0

1.5

2.0

B

2.5

3.0

- 0.5

- 1.0

- 1.5

- 2.0

- 2.5

- 3.0

B

A

AA

Max. deviation (°C)

Max. deviation (°C)

Characteristics

1) |t| = absolute value °C

In order to obtain the maximum tolerances in °F, the results in °C must be multiplied by a factor
of 1.8.

Influence of ambient

Depends on the head transmitter used. For details, see Technical Information. →  26

temperature

Self heating

RTD elements are passive resistances that are measured using an external current. This
measurement current causes a self-heating effect in the RTD element itself which in turn creates an
additional measurement error. In addition to the measurement current, the size of the measurement
error is also affected by the temperature conductivity and flow velocity of the process. This self­heating error is negligible when an Endress+Hauser iTEMP temperature transmitter (very low
measured current) is used.

Response time

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

Pipe diameter

6 mm (¹⁄₄ in)

8 mm (0.31 in)

Reduced 4.5 mm (0.18 in)x

Reduced 5.3 mm (0.21 in) x

Response time without transmitter.

1x Pt100 thin-film sensor

Shape of tip

Response time

t

50

Straight 5 s 11 s

18 mm (0.71 in)

20 mm (0.79 in)

3.5 s 9 s

5 s 10.5 s

A0008588-EN

t

90

Endress+Hauser 7

iTHERM TM401

Calibration

Insulation resistance

Calibration of thermometers

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,

• Calibration compared 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 with
very homogeneous thermal values, or special calibration furnaces are typically used for thermometer
calibrations. The measuring uncertainty may increase due to heat conduction errors and short
immersion lengths. The existing measuring uncertainty is recorded on the individual certificate of
calibration. For accredited calibrations in accordance with ISO17025, a measuring uncertainty that is
twice as high as the accredited measuring uncertainty is not permitted. If this limit is exceeded, only
a factory calibration is possible.

For the device, Endress+Hauser offers standard calibrations at a reference temperature of
–50 to +200 °C (–58 to +392 °F) based on the ITS90 (International Temperature Scale). Calibrations
in other temperature ranges are available from your Endress+Hauser sales center on request.
Calibrations are traceable to national and international standards. The calibration certificate is
referenced to the serial number of the thermometer.

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.

Orientation

Installation instructions

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 and
the container wall. 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

• To minimize the error caused by heat conduction, a minimum immersion length, which
corresponds to the calibration, is recommended depending on the type of sensor used.

8 Endress+Hauser

iTHERM TM401

U

≥ 3°

≥ 3°

1

2

3

4

1 2

A0008946

 2 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

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).

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

1

Varivent® - process connection D = 50 mm for DN25 pipes

2 Clamp or micro-clamp

A0018881

Endress+Hauser 9

iTHERM TM401

1 2

3

4

R0.4

R0.4

Pressure ring

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

O-ring

Welding boss

Vessel wall

 4 Detailed installation instructions for hygiene-compliant installation

1 Sanitary connection according to DIN 11851, only in conjunction with self-centering sealing ring as per

EHEDG position paper

2

Varivent® process connection for VARINLINE® housing
3 Clamp as per ISO 2852, only in conjunction with seal as per EHEDG position paper
4 Process connection Liquiphant-M G1", horizontal installation

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. →  22.

The following action must be taken if a sealing ring (O-ring) or seal fails:

• Remove the thermometer, clean the thread and the O-ring joint/sealing surface

• Replace the sealing ring or seal

• Perform CIP after installation
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 recesses, folds or gaps

• Honed and 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® Standard must be observed). The
Varivent® and Liquiphant M weld-in adapter connections enable flush-mounted installation.

A0011758-EN

Environment

Ambient temperature range

Storage temperature

Humidity

10 Endress+Hauser

Terminal head Temperature in °C (°F)

Without mounted head transmitter

Depends on the terminal head used and the cable gland or fieldbus
connector, see 'Terminal heads' section

With mounted head transmitter –40 to 85 °C (–40 to 185 °F)

With mounted head transmitter and

–20 to 70 °C (–4 to 158 °F)

display

Terminal head Temperature in °C (°F)

Without mounted head transmitter Depends on the terminal head used and the cable gland or fieldbus

connector, see 'Terminal heads' section

With mounted head transmitter –40 to 85 °C (–40 to 185 °F)

For information, see the ambient temperature.

Depends on the transmitter used. If using Endress+Hauser iTEMP head transmitters:

• Condensation permitted as per IEC 60 068-2-33

• Max. rel. humidity: 95% as per IEC 60068-2-30

iTHERM TM401

Climate class

Degree of protection

Shock and vibration resistance

Electromagnetic compatibility (EMC)

Process temperature range

Thermal shock

As per EN 60654-1, Class C

Max. IP69K, depending on the design (terminal head, connector, etc.)

The Endress+Hauser inserts meet the requirements of IEC 60751 which specify shock and vibration
resistance of 3g in the range from 10 to 500 Hz. The vibration resistance at the measuring point
depends on the sensor type and design, see the following table:

Version Vibration resistance for the sensor tip

Pt100 (TF) 30 m/s² (3g)

Depends on the head transmitter used. For details see the Technical Information. →  26

Process

Maximum –50 to +200 °C (–58 to +392 °F)

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

Process pressure range

The maximum possible process pressure depends on various influencing factors, such as the
thermometer design, process connection and process temperature. For information on the maximum
possible process pressures for the individual process connections, see the 'Process connection' section.
→  16

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 also the 'Accessories' section. →  25

Example of the permitted flow rate as a function of the immersion length and medium

The highest flow velocity tolerated by the thermometer diminishes with increasing thermometer
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 measuring medium, on the process temperature and on the
process pressure. The following figures exemplify the maximum permitted flow velocities in water
and superheated steam at a process pressure of 40 bar (580 PSI).

Endress+Hauser 11

v (ft/s)

0 1 2 3 4 5 7 8 9 10

11

L (in)

6

12

0

5

10

15

20

25

30

35

40

0 30 60 90 120 150 180 210 240 270 300

L (mm)

v (m/s)

0

15

30

45

60

75

90

105

120

135

A B

 5 Permitted flow velocities, thermowell diameter 6 mm (¼ in)

A Medium water at T = 50 °C (122 °F)
B Medium superheated steam at T = 400 °C (752 °F)
L Immersion length exposed to flow
v Flow velocity

iTHERM TM401

A0008065

Medium - state of

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

aggregation

12 Endress+Hauser

iTHERM TM401

M24x1.5

1

U

3 (0.12)

20

(0.8)

Ø5.3

(0.21)

Ø8

(0.31)

Ø15 (0.6)

U

T

Ø6 (¼)

Ø6 (¼)

2 (0.08)

10 (0.4)

10 (0.4)

2 (0.08)

U

T

NPT ½“

U

U

18

(0.71)

Ø4.1

(0.16)

M24x1.5

NPT ½“

U

18

(0.71)

18

(0.71)

Ø4.1

(0.16)

Ø4.1

(0.16)

U

T

2 3 4 5 6

Ø6

(¼)

Ø6

(¼)

Ø6 (¼)

Ø25

(0.98)

Ø25

(0.98)

A

B

Mechanical construction

Design, dimensions

All dimensions in mm (in).

A0018909

A Version with process connection
B Version without process connection or optionally with compression fitting
1 Thermometer with process connection and M24x1.5 thread to terminal head - shape of tip 6 mm (¼ in)

straight or
2 Optional shape of tip: 8 mm (0.31 in) reduced to 5.3 mm (0.21 in)
3 Thermometer with process connection and NPT ½" thread to the terminal head
4 Thermometer without process connection with M24x1.5 thread (optional NPT ½" thread) to terminal head -

shape of tip 6 mm (¼ in) reduced
5 Thermometer with spherical, movable TK40 compression fitting for weld-in - shape of tip 6 mm (¼ in)

reduced
6 Thermometer with spherical, fixed TK40 compression fitting for weld-in - shape of tip 6 mm (¼ in) reduced
T Length of extension neck (T = 0, for version without process connection or for version with movable

Weight

compression fitting)
U Immersion length

0.5 to 2.5 kg (1 to 5.5 lbs) for standard options.

Material

Endress+Hauser 13

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.

iTHERM TM401

107.5 (4.23)

68.5 (2.7)

28

(1.1)

78 (3.1)

15.5 (0.6)

The maximum operating temperatures can be reduced considerably in cases where abnormal
conditions such as high mechanical load occur or in aggressive media.

Surface roughness

Designation Short form Recommended

max. temperature
for continuous use
in air

AISI 316L
(corresponds to

1.4404
or 1.4435)

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.

X2CrNiMo17-13-2,
X2CrNiMo18-14-3

650 °C (1 202 °F)

Properties

1)

• 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

• The wetted part in a protective tube is
made of 316L or 1.4435+316L
passivated with 3% sulfuric acid.

Values for wetted surfaces:

Standard surface Ra ≤ 0.76 µm (30 µin)

Finely honed surface

1) Not compliant with ASME BPE

1)

Ra ≤ 0.38 µm (15 µin)

Terminal heads

All terminal heads have an internal shape and size in accordance with DIN EN 50446, flat face and a
thermometer connection with a M24x1.5 or ½" NPT thread. All dimensions in mm (in). The sample
cable glands in the diagrams correspond to M20x1.5 connections with non-Ex polyamide cable
glands. Specifications without head transmitter installed. For ambient temperatures with head
transmitter installed, see the 'Environment' section. →  10

As a special feature, Endress+Hauser offers terminal heads with optimized terminal accessibility for
easy installation and maintenance.

TA30A Specification

• Degree of protection:
– IP66/68 (NEMA Type 4x encl.)
– For ATEX: IP66/67

• Temperature: –50 to +150 °C (–58 to +302 °F) without cable
gland

• Material: aluminum, polyester powder coated
Seals: silicone

• Cable entry thread: G ½", ½" NPT and M20x1.5;

• Protective fitting connection: M24x1.5

• Color of head: blue, RAL 5012

• Color of cap: gray, RAL 7035

• Weight: 330 g (11.64 oz)

A0009820

• Ground terminal, internal and external

• Available with sensors with 3-A® symbol

14 Endress+Hauser

iTHERM TM401

71 (2.8)

64 (2.52)

64 (2.52)

96 (3.8)

25
(1)

122 (4.8)

28

(1.1)

78 (3.1)

50 (1.97)

87 (3.43)

81.7 (3.22)

TA30R Specification

• Degree of protection - standard version: IP69K (NEMA Type
4x encl.)

• Temperature: –50 to +130 °C (–58 to +266 °F) without cable
gland

• Material: stainless steel 316L, abrasive-blasted or hand­polished
Seals: EPDM

• Cable entry thread ½" NPT and M20x1.5

• Weight: 360 g (12.7 oz)

• Protection armature connection: M24x1.5 or ½" NPT

• Ground terminal: internal in standard version; external
terminal optionally available

• Available in conjunction with 3-A® marked sensors

A0018914

TA30S Specification

• Degree of protection: IP65 (NEMA Type 4x encl.)

• Temperature: –40 to +85 °C (–40 to +185 °F) without cable
gland

• Material: polypropylene (PP), FDA-compliant, seals: O-ring
EPDM

• Cable entry thread: ¾" NPT (with adapter for ½" NPT),
M20x1.5

• Protective assembly connection: ½" NPT

• Color: white

• Weight: approx. 100 g (3.5 oz)

• Ground terminal: only internal via auxiliary terminal

• Available in conjunction with 3-A marked sensors

A0017146

Cable glands and fieldbus connectors

Type

Cable gland, polyamide

Fieldbus connector (M12, 4-pin)

Suitable for
cable entry

½" NPT, ¾" NPT,
M20x1.5

½" NPT,
M20x1.5

½" NPT,
M20x1.5

Degree of
protection

IP68 –40 to +100 °C (–40 to +212 °F)

IP69K –20 to +95 °C (–4 to +203 °F)

IP67, NEMA
Type 6

Temperature range

–30 to +90 °C (–22 to +194 °F)

Endress+Hauser 15

iTHERM TM401

A

B

U

!d

!D

1

2

R0.4

R0.4

!i

!a

Process connections

All dimensions in mm (in).

Releasable process connection

Sanitary connection according to DIN 11851

1 Centering ring
2 Sealing ring

1)

Version

DN25

DN32 50 mm

DN40 56 mm

DN50 68 mm

Type Technical properties

• With 3-A® symbol and
EHEDG certification (only
with EHEDG-certified and
self-centering sealing ring).

• ASME BPE compliance

A0009561

Dimensions

D A B i a

44 mm

(1.73 in)

(1.97 in)

(2.2 in)

(2.68 in)

30 mm

(1.18 in)

36 mm

(1.42 in)

42 mm

(1.65 in)

54 mm

(2.13 in)

10 mm

(0.39 in)

10 mm

(0.39 in)

10 mm

(0.39 in)

11 mm

(0.43 in)

26 mm

(1.02 in)

32 mm

(1.26 in)

38 mm
(1.5 in)

50 mm

(1.97 in)

29 mm

(1.14 in)

35 mm

(1.38 in)

41 mm

(1.61 in)

53 mm

(2.1 in)

40 bar (580 psi)

40 bar (580 psi)

40 bar (580 psi)

25 bar (363 psi)

P

max.

1) Pipes in accordance with DIN 11850

16 Endress+Hauser

iTHERM TM401

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”

3 (0.12)

20 (0.8)

"18 (0.71)

8 (0.31)

"8 (0.31)

T

45°

!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

M12x1.5

Type Version Technical properties

Metal sealing system

G½"

P

= 16 bar (232 psi)

Thermowell diameter 6

mm (¼ in)

max.

Maximum torque =



10 Nm (7.38 lbf ft)

-

Type

Clamp according to ISO 2852

A0009574

DN8-18 (0.5"-0.75")

A0020856

Thermowell diameter

8 mm (0.31 in)

A0022326

Version Dimensions

1)

d:

Microclamp

2)

3)

D a

-

25 mm (0.98 in)

Tri-clamp DN8-18

(0.5"-0.75")

DN12-21.3

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)

P

= 16 bar (232 psi)

max.

Maximum torque =



10 Nm (7.38 lbf ft)

Technical properties

• P

= 16 bar (232 psi),

max.

depends on clamp ring and
suitable seal

• With 3-A® symbol

• P

= 16 bar (232 psi),

max.

depends on clamp ring and
suitable seal

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

• ASME BPE compliance

4)

A0009566

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 thermowell diameter = 6 mm (¼ in)

4) Not for DN12-21.3

Endress+Hauser 17

Microclamp and Tri-clamp

iTHERM TM401

U

35 (1.38)

20

(0.79)

5 (0.20)

!45 (1.77)

!50 (1.97)

U

L1

1

G

A

U

!D

!B

!A

h

Type Version Technical properties

Process adapter

Type Version G

Thread according to ISO 228 (for

Liquiphant weld-in adapter)

D45 -

A0034881

Dimensions

L1 thread

A 1 (SW/AF)

length

G¾" for

FTL20/31/33

adapter

16 mm

(0.63 in)

25.5 mm (1 in) 32

G¾" for FTL50

adapter

A0009572

G1" for FTL50

adapter

18.6 mm
(0.73 in)

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)

• With 3-A® symbol and
EHEDG-tested in conjunction
with FTL31/33/50 adapter

• ASME BPE compliance

Type Version

Dimensions Technical properties

D A B h P

®

Varivent

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 F 50 mm

(1.97 in)

Type N 68 mm

(2.67 in)

145 mm
(5.71 in)

165 mm

(6.5 in)

135 mm

(5.31 in)

155 mm

(6.1 in)

24 mm

(0.95 in)

24.5 mm
(0.96 in)

max.

10 bar

(145 psi)

• With 3-A® symbol and
EHEDG certification

• ASME BPE compliance

18 Endress+Hauser

iTHERM TM401

U

!D

!i

!a

U

1

2
3

h

!D

!A

Type Technical properties

Varivent® for VARINLINE® housing for installation in pipes

• With 3-A® symbol and
EHEDG certification

• ASME BPE compliance

A0009564

Version

Type N, according to DIN

11866, series A

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

Dimensions

D i a

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

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

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

68 mm (2.67 in)

68 mm (2.67 in)

68 mm (2.67 in)

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)

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)

P

max.

DN40 to DN65:

16 bar (232 psi)

DN80 to DN150:

10 bar (145 psi)

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)

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.



Endress+Hauser 19

D A h

(1.26 in)

(1.89 in)

(2.36 in)

Dimensions

35.5 mm
(1.4 in)

55 mm

(2.17 in)

65 mm

(2.56 in)

7 mm (0.28 in)

8 mm (0.31 in)

9 mm (0.35 in)

Technical properties

P

= 6 bar (87 psi)

max.

Without process connection (for compression fitting)

1 2

!di

!D

h

!d

!d

iTHERM TM401

Type Version

Compression fitting TK40 for weld-in

Spherical

Ferrule material PEEK or

316L

Thread G¼"

A0018912

1 Movable
2 Fixed

1) All the pressure specifications apply for cyclic temperature load

Dimensions

di D h

6.3 mm

(0.25 in) for

thermowell

diameter Ød

=

25 mm

(0.98 in)

6 mm

(0.236 in)

33 mm

(1.3 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),

max.

T

= +200 °C (+392 °F) for

max.

316L material, tightening
torque = 25 Nm

• PEEK ferrule has 3-A®
symbol and EHEDG
certification

1)

Minimum extension neck lengths, dependent on respective process connection

Process connection Extension next length T

• None

• Compression fitting, movable

• Thread according to ISO 228

• Compression fitting, fixed

• Metal sealing system

• Clamp according to ISO 2852

• Sanitary connection according to DIN 11851

• Varivent

®

• SMS 1147

Predefined (cannot be selected, T = 0)

≥ 82 mm (3.23 in)

≥ 55 mm (2.17 in)

20 Endress+Hauser

iTHERM TM401

Certificates and approvals

CE mark

Hygiene standard

Other standards and guidelines

CRN approval

Areas in contact with medium

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

• EHEDG certificate type EL - CLASS I. Permitted process connections in accordance with EHEDG, see
'Process connections' section →  16

• 3-A® certificate, authorization no. 1144, 3-A® sanitary standard 74-06. For process connections
with 3-A® symbol, see "Process connections" section. →  16

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

• 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 EN 50446: Terminal heads

The CRN approval is only available for certain thermowell versions. These versions are identified and
displayed accordingly during the configuration of the device.

Detailed ordering information is available from the following sources:

• In the Download Area of the Endress+Hauser website: www.endress.com → Select your country →
Downloads → Enter the product code or the device → Search field: approvals & certificates → Select
the approval type → Run the search

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

The areas 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.

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

• FDA-compliant

• All surfaces in contact with medium are produced without animal fats (ADI/TSE)

Surface roughness

Material resistance

Material certification

Calibration

Free 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 calibration is performed on the replaceable insert of the thermometer. In
the case of thermometers without a replaceable insert, the entire thermometer - from the process
connection to the tip of the thermometer - is calibrated.

Endress+Hauser 21

iTHERM TM401

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

Accessories

Various accessories, which can be ordered with the device or subsequently from Endress+Hauser, are
available for the device. Detailed information on the order code in question is available from your
local Endress+Hauser sales center or on the product page of the Endress+Hauser website:

www.endress.com.

22 Endress+Hauser

iTHERM TM401

!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

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

Weld-in adapter

Dummy plug

A0018236

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

Order number:

• 60022519 (G½")

• 60021194 (M12x1.5)

A0009213-EN

A0008246 A0008251 A0008256 A0011924 A0008248 A0008253

G ¾", d=29

mounted on pipe

Material 316L (1.4435) 316L (1.4435) 316L (1.4435) 316L (1.4435) 316L (1.4435) 316L (1.4435)

Roughness μm (μin)
on process side

Order number for
weld-in adapter

≤1.5 (59.1) ≤0.8 (31.5) ≤0.8 (31.5) ≤0.8 (31.5) ≤0.8 (31.5) ≤0.8 (31.5)

71258357 71258355 52001052 71258358 52001051

G ¾", d=50

mounted on

vessel

G ¾", d=55 with

flange

G 1", d=53 without

flange

G 1", d=60 with

flange

1)

G 1" adjustable

Endress+Hauser 23

52001221

2)

Order number for
weld-in adapter with
inspection
certificate

Order number for
replacement seal (set
of 5)

Order number for
welding jig

Order number for
dummy plug

Order number for
dummy plug with
inspection
certificate

1) Replaces weld-in adapter with order number 917969-1000.

2) Replaces weld-in adapter with order number 215159-0000.

3) AD2000: AD2000: The 316L material in contact with the process complies with AD2000 – W0/W2.

4) Inspection certificate as per EN10204-3.1 material

5) One seal is included in the scope of delivery of the weld-in adapter.

6) TSP modification number. Can only be ordered via FTSP, PTSP or NTSP.

3) 4)

5)

6)

6)

4) 6)

52028295 52018765 52011897 71093129 52011896

Silicone O-ring

52021717

71174959 71174959 71168889 71166879 71166879 71181945

71167850 71167850 71177193 71173810 71173810 71166366

- - 71190074 71167291 71167291 71196853

Silicone O-ring

52021717

Silicone O-ring

52014473

Silicone O-ring

52014472

1)

Silicone O-ring

52014472

iTHERM TM401

52011898

Silicone profile

52014424

2)

gasket

Communication-specific accessories

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 weld-in adapters FTL20, FTL31, FTL33, FTL50, see Technical
Information (TI00426F/00).

Configuration kit TXU10 Configuration kit for PC-programmable transmitter with setup software and

interface cable for PC with USB port
Order code: TXU10-xx

Commubox FXA195
HART

Commubox FXA291 Connects Endress+Hauser field devices with a CDI interface (= Endress+Hauser

HART Loop Converter
HMX50

Wireless HART adapter
SWA70

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

For details, see "Technical Information" TI00404F



Common Data Interface) and the USB port of a computer or laptop.

For details, see "Technical Information" TI00405C



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

Is used for the wireless connection of field devices.
The WirelessHART adapter can be easily integrated into field devices and existing
infrastructures, offers data protection and transmission safety and can be operated
in parallel with other wireless networks with minimum cabling complexity.

For details, see Operating Instructions BA061S



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

24 Endress+Hauser

iTHERM TM401

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

Field Xpert SFX100 Compact, flexible and robust industry handheld terminal for remote configuration

and for obtaining measured values via the HART current output (4-20 mA).

For details, see Operating Instructions BA00060S



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://wapps.endress.com/applicator

• On CD-ROM for local PC installation.

Configurator

W@M Life cycle management for your plant

+temperature

Software for selecting and configuring the product depending on the measuring
task, supported by graphics. Includes a comprehensive knowledge database and
calculation tools:

• For temperature competence

• Quick and easy design and sizing of temperature measuring points

• Ideal measuring point design and sizing to suit the processes and needs of a wide
range of industries

The Configurator is available:
On request from your Endress+Hauser sales office on a CD-ROM for local PC
installation.

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

• On CD-ROM for local PC installation.

FieldCare 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 BA00059S



System components

Accessories Description

Field display unit RIA16 The display unit records the analog measuring signal from the head transmitter

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

and shows this on the display. The LC display shows the current measured value in
digital form and as a bar graph indicating a limit value violation. The display unit is
looped into the 4 to 20 mA circuit and gets the required energy from there.

For details, see the "Technical Information" document TI00144R/09/en



circuits. Offers bidirectional HART transmission.

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



BA00202R

Endress+Hauser 25

iTHERM TM401

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

Bidirectional communication is possible via the HART communication jacks.

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



Instructions KA00110R

Documentation

Technical Information
iTEMP temperature head transmitter:
– TMT80, PC-programmable, single-channel, RTD and TC (TI153R/09/en)
– TMT180, PC-programmable, single-channel, Pt100 (TI088R/09/en)
– TMT181, PC-programmable, single-channel, RTD, TC, Ω, mV (TI00070R/09/en)
– HART® TMT182, single-channel, RTD, TC, Ω, mV (TI078R/09/en)

26 Endress+Hauser

www.addresses.endress.com