Endress+Hauser iTHERM TM411, iTHERM TM412, iTHERM TM401, iTHERM TM402 Technical Information

Easy-to-use imperial version with outstanding
sensor technology

Applications

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

• Measuring range: –200 to +600 °C (–328 to +1 112 °F)

• Pressure range up to 40 bar (580 psi)

• Protection class: up to IP69K

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

®

• PROFIBUS® PA, FOUNDATION Fieldbus™

Your benefits

• User-friendly and reliable from product selection to maintenance

• iTHERM inserts: globally unique, automated production. Full traceability and
consistently high product quality for reliable measured values

• iTHERM QuickSens: fastest response times (t

90s

: 1.5 s) for optimum process control

• iTHERM StrongSens: unsurpassed vibration resistance (> 60g) for ultimate plant
safety

• iTHERM QuickNeck – cost and time savings thanks to simple, tool-free
recalibration

• iTHERM TA30R: 316L terminal head for easier handling and lower installation
and maintenance costs, and with highest IP69K rating

• International certification: explosion protection e.g. ATEX/IECEx/FM/CSA and in
compliance with hygiene standards according to 3-A®, EHEDG, ASME BPE, FDA,
TSE Certificate of Suitability

Products

Solutions Services

Technical Information

iTHERM TM412

Trend-setting, modular resistance thermometer
for hygienic and aseptic applications

TI01348T/09/EN/01.17
71362828

iTHERM TM412

2 Endress+Hauser

Table of contents

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

iTHERM Hygiene line ........................... 3

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

Measuring system ............................. 4

Modular design ............................... 5

Input ..................................... 6

Measured variable ............................. 6

Measuring range .............................. 6

Output ................................... 6

Output signal ................................ 6

Family of temperature transmitters ................. 6

Wiring ................................... 7

Wiring diagrams for RTD ........................ 7

Cable entries ................................ 8

Connectors .................................. 9

Overvoltage protection ......................... 11

Performance characteristics .................. 11

Reference conditions .......................... 11

Maximum measured error ....................... 11

Influence of ambient temperature ................. 12

Self heating ................................ 12

Response time .............................. 12

Calibration ................................. 13

Insulation resistance .......................... 15

Installation ............................... 15

Orientation ................................ 15

Installation instructions ........................ 15

Environment .............................. 18

Ambient temperature range ..................... 18

Storage temperature .......................... 18

Humidity .................................. 18

Climate class ............................... 18

Degree of protection .......................... 18

Shock and vibration resistance .................... 18

Electromagnetic compatibility (EMC) ............... 18

Process .................................. 18

Process temperature range ...................... 18

Thermal shock .............................. 18

Process pressure range ......................... 18

Medium - state of aggregation .................... 19

Mechanical construction .................... 20

Design, dimensions ........................... 20

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

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

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

Terminal heads .............................. 24

Extension neck .............................. 28

Process connections ........................... 29

Tip shape ................................ 31

Certificates and approvals ................... 33

CE mark ................................... 33

Hygiene standard ............................ 33

Ex approval ................................ 33

Other standards and guidelines ................... 33

Parts in contact with the medium .................. 33

Surface purity ............................... 33

Material resistance ........................... 33

Material certification .......................... 33

Calibration ................................. 33

Protection tube testing and load capacity calculation ..... 34

Ordering information ....................... 34

Accessories ............................... 35

Device-specific accessories ...................... 35

Communication-specific accessories ................ 37

Service-specific accessories ...................... 38

System components ........................... 38

Documentation ............................ 39

iTHERM TM412

Endress+Hauser 3

Function and system design

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

mm

A0018239

TM412

inch

A0018691

↓ ↓

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

mm

A0018692

TM402

inch

A0018693

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.

iTHERM TM412

4 Endress+Hauser

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).

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

• Data managers

• Overvoltage protection

For more information, see the brochure 'System Products and Data Managers - Solutions for the
loop' (FA00016K)

FieldCare

Memograph M

RSG45

RIA15

TM4xx

PLC

A0033768

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

iTHERM TM412

Endress+Hauser 5

• iTHERM TM4x2: Installed RTD thermometer with integrated HART® head transmitter

• Display unit RIA15:

- Display of 4 to 20 mA measured values or HART® process variables

- Loop-powered

- Voltage drop ≤1 V (HART® ≤1.9 V)

• Data Management Memograph M RSG45:

- Tamper-proof data storage and access (FDA 21 CFR 11)

- HART® gateway functionality; Up to 40 HART® devices connected at a time

- Communication capabilities: Modbus, Profibus DP, PROFINET, EtherNet/IP

• PLC / FieldCare: Field Data Manager Software MS20 - Automatic service for report generation,
printing reports, read out of data, storing of data, secure export, pdf generation Read out
measured data via online interface or from mass storage Online visualization of instantaneous
values (“live data”) . More information on this can be found in the Technical Information, see
"Documentation".

Modular design

Design Options

7

U

5

6

1

2

3

4

A0034469

1: Terminal
head →  24

• 316L, high or low head, optionally with display window

• Aluminum, high or low head, with or without display window

• Polypropylene, low head

• Polyamide, high head, without display window



Your benefits:

• Optimum terminal access thanks to low housing edge of bottom
section:
– Easier to use
– Lower installation and maintenance costs

• Optional display: local process display unit for added reliability

• IP69K protection: optimum protection even with high-pressure
cleaning

2: Wiring,
electrical
connection,
output signal
→  6

• Ceramic terminal block

• Flying leads

• Head transmitter (4 to 20 mA, HART®, PROFIBUS® PA,
FOUNDATION™ Fieldbus), single-channel or two-channel

• Attachable display (optional)

3: Connector or
cable gland
→  28

• PROFIBUS® PA / FOUNDATION™ Fieldbus connector, 4-pin

• 8-pin connector

• Polyamide cable glands

4: Extension
neck →  28

Quick fastener iTHERM QuickNeck or NPT 1/2"



Your benefits:

• iTHERM QuickNeck: tool-free removal of the insert:
– Saves time/costs on frequently calibrated measuring points
– Wiring mistakes avoided

• IP69K protection: safety under extreme process conditions

5: Process
connection
→  29

Wide range of different versions.

iTHERM TM412

6 Endress+Hauser

Design Options

6: Thermowell • Various diameters

• Various tip shapes (straight or reduced)

7: Insert
→  23

Sensor models: wire wound (WW) or thin-film sensor (TF).



Your benefits:

• iTHERM QuickSens - insert with the world's fastest response
time:
– Insert: 3 mm (0.12 in) or 6 mm (0.24 in)
– Fast, highly accurate measurements, delivering maximum

process safety and control
– Quality and cost optimization
– Minimization of necessary immersion length: better product

protection thanks to improved process flow

• iTHERM StrongSens - insert with unbeatable durability:
– Vibration resistance > 60g: lower life cycle costs thanks to

longer operating life and high plant availability

– Automated, traceable production: top quality and maximum

process safety

– High long-term stability: reliable measured values and high

level of system safety

Input

Measured variable

Temperature (temperature-linear transmission behavior)

Measuring range

Depends on the type of sensor used

Sensor type Measuring range

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

Pt100 thin-film, iTHERM
StrongSens, vibration­resistant > 60g

–50 to +500 °C (–58 to +932 °F)

Pt100 thin-film, iTHERM
QuickSens, fast-response

–50 to +200 °C (–58 to +392 °F)

Pt100 wire wound, extended
measuring range

–200 to +600 °C (–328 to +1 112 °F)

Output

Output signal

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.

Family of temperature
transmitters

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. →  39

iTHERM TM412

Endress+Hauser 7

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 using universal device configuration tools like FieldCare, DeviceCare or
FieldCommunicator 375/475. For more information, see the Technical Information. →  39

PROFIBUS® PA head transmitters

Universally programmable head transmitter with PROFIBUS® PA communication. Conversion of
various input signals into digital output signals. High accuracy over the complete ambient
temperature range. The configuration of PROFIBUS PA functions and of device-specific parameters is
performed via fieldbus communication. For more information, see the Technical Information.
→  39

FOUNDATION Fieldbus™ head transmitters

Universally programmable head transmitter with FOUNDATION Fieldbus™ communication.
Conversion of various input signals into digital output signals. High accuracy over the complete
ambient temperature range. All transmitters are released for use in all important process control
systems. The integration tests are performed in Endress+Hauser's "System World". For more
information, see the Technical Information. →  39

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.

Wiring diagrams for RTD

Type of sensor connection

Head mounted transmitter TMT18x (single input)

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

A0016433-EN

iTHERM TM412

8 Endress+Hauser

Head mounted transmitter TMT8x (dual input)

-

+

+

1

-

2

7

6

5

4

3

1

2

7

6

5

4

3

Sensor input 2

Sensor input 1

RTD 4- and 3-wire:

RTD 3-wire:

Bus connection

and supply voltage

Display connection

white

red

red

white

green

black

black

A0034449-EN

Terminal block mounted

3-wire single 2 x 3-wire single 4-wire single

Outside screw

Red1

Red3

White5

White3

Red1

Red2

Black5

Black6

Green4

Red1

Red3

White4

White6

A0034451-EN

Head mounted field transmitter TMT162 (dual input)

+

-

1

2

3

4

5

6

+

-

3

4

S1

3

S2

-

+

+

-

#

(white)

(white)

(red)

(red)

RTD

RTD

RTD

Sensor 1

Sensor 2

3

3

1

1

4

2

2

(black) 5
(black) 6

(green) 4

Sensor 1

Sensor 2

3-wire

4-wire

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

A0034450-EN

Cable entries

See the 'Terminal head' section

iTHERM TM412

Endress+Hauser 9

Connectors

Endress+Hauser offers a wide variety of connectors for the simple and fast integration of the
thermometer into a process control system. The following tables show the PIN assignments of the
various plug connector combinations.

Abbreviations

#1 Order: first transmitter/insert #2 Order: second

transmitter/insert

i Insulated. Wires marked 'i' are not connected and are

insulated with heat shrink tubes.

YE Yellow

GND Grounded. Wires marked 'GND' are connected to the

internal grounding screw in the terminal head.

RD Red

BN Brown WH White

GNYE Green-yellow PK Pink

BU Blue GN Green

GY Gray BK Black

Terminal head with one cable entry

Plug 1x PROFIBUS PA

1x FOUNDATION™

Fieldbus (FF)

8-pin

Plug thread M12 7/8" 7/8" M12

PIN number 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 5 6 7 8

Electrical connection (terminal head)

Flying leads Not connected (not insulated)

3-wire terminal

block (1x Pt100)

RD RD

WH

RD RD

WH

RD RD

WH

RD RD

WH

i

4-wire terminal

block (1x Pt100)

WH WH WH WH WH WH WH WH

6-wire terminal

block (2x Pt100)

RD

(#1)

1)

RD

(#1)

1)

WH (#1)

1)

RD

(#1)

1)

RD

(#1)

1)

WH (#1)

1)

RD

(#1)

1)

RD

(#1)

1)

WH (#1)

1)

WH BK BK YE

1x TMT 4 to 20

mA or HART

®

+ i - i + i - i + i - i

+

(#1)

i

-

(#1)

i

i

2x TMT 4 to 20

mA or HART® in

the terminal

head with a high

cover

+

(#1)+(#2)-(#1)-(#2)+(#1)+(#2)-(#1)-(#2)+(#1)+(#2)-(#1)-(#2)

+

(#2)

i

-

(#2)

i

1x TMT

PROFIBUS® PA

+

i

­GND

2)

+

i

­GND

2)

Cannot be combined Cannot be combined

2x TMT

PROFIBUS® PA+(#1)

-

(#1)

+ -

1x TMT FF

Cannot be combined Cannot be combined

- +
GND i Cannot be combined

2x TMT FF

-

(#1)+(#1)

PIN position and

color code

1 BN
2 GNYE
3 BU
4 GY

1

4 3

2

A0018929

1 BN
2 GNYE
3 BU
4 GY

1

4

3

2

A0018930

1 BU
2 BN
3 GY
4 GNYE

1

4

3

2

A0018931

1 WH

2 BN

3 GN

4 YE

5 GY

6 PK

7 BU

8 RD

A0018927

1) Second Pt100 is not connected

2) If a plastic housing TA30S or TA30P is used, insulated 'i' instead of grounded GND

iTHERM TM412

10 Endress+Hauser

Terminal head with two cable entries

Plug 2x PROFIBUS® PA 2x FOUNDATION™ Fieldbus (FF)

Plug thread

#1 #2

A0021706

M12(#1) / M12(#2) 7/8"(#1) / 7/8"(#2) 7/8"(#1) / 7/8"(#2)

PIN number 1 2 3 4 1 2 3 4 1 2 3 4

Electrical connection (terminal head)

Flying leads Not connected (not insulated)

3-wire terminal block (1x Pt100)

RD/i RD/i

WH/i

RD/i RD/i

WH/i

RD/i RD/i

WH/i

4-wire terminal block (1x Pt100) WH/i WH/i WH/i WH/i WH/i WH/i

6-wire terminal block (2x Pt100) RD/BK RD/BK WH/YE RD/BK RD/BK WH/YE RD/BK RD/BK WH/YE

1x TMT 4 to 20 mA or HART

®

+/i

i/i

-/i
i/i

+/i

i/i

-/i
i/i

+/i

i/i

-/i
i/i

2x TMT 4 to 20 mA or HART® in the

terminal head with a high cover

+(#1)/

+(#2)

-(#1)/

-(#2)

+(#1)/

+(#2)

-(#1)/

-(#2)

+(#1)/

+(#2)

-(#1)/

-(#2)

1x TMT PROFIBUS® PA +/i -/i

GND/

GND

+/i -/i

GND/

GND

Cannot be combined

2x TMT PROFIBUS® PA

+(#1)/

+(#2)

-(#1)/

-(#2)

+(#1)/

+(#2)

-(#1)/

-(#2)

1x TMT FF

Cannot be combined Cannot be combined

-/i +/i
i/i

GND/

GND

2x TMT FF

-(#1)/

-(#2)

+(#1)/

+(#2)

PIN position and color code

1 BN
2 GNYE
3 BU
4 GY

1

4 3

2

A0018929

1 BN
2 GNYE
3 BU
4 GY

1

4

3

2

A0018930

1 BU
2 BN
3 GY
4 GNYE

1

4

3

2

A0018931

Connection combination: insert - transmitter

Insert

Transmitter connection

1)

1x 1-channel 2x 1-channel

2)

1x 2-channel 2x 2-channel

2)

1x Pt100, flying

leads

Pt100 (#1) : transmitter (#1)

Pt100 (#1) : transmitter (#1)

(Transmitter (#2) not

connected)

Pt100 (#1) : transmitter (#1)

Pt100 (#1) : transmitter (#1)

Transmitter (#2) not connected

2x Pt100, flying

leads

Pt100 (#1) : transmitter (#1)

Pt100 (#2) insulated

Pt100 (#1) : transmitter (#1)

Pt100 (#2): transmitter (#2)

Pt100 (#1) : transmitter (#1)
Pt100 (#2) : transmitter (#1)

Pt100 (#1) : transmitter (#1)
Pt100 (#2) : transmitter (#1)

(Transmitter (#2) not

connected)

1x Pt100 with

terminal block

2)

Pt100 (#1) : transmitter in

cover

Cannot be combined

Pt100 (#1) : transmitter in

cover

Cannot be combined

2x Pt100 with

terminal block

2)

Pt100 (#1) : transmitter in

cover

Pt100 (#2) not connected

Pt100 (#1) : transmitter in

cover

Pt100 (#2) : transmitter in

cover

1) If 2 transmitters are selected in a terminal head, transmitter #1 is installed in the high cover. A TAG cannot be ordered for the 2nd transmitter as
standard. The bus address is set to the default value and, if necessary, must be changed manually before commissioning.

2) Only in the terminal head with a high cover, only 1 transmitter possible. A ceramic terminal block is automatically fitted on the insert.

iTHERM TM412

Endress+Hauser 11

Overvoltage protection

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

Reference conditions

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.

Maximum measured error

RTD resistance thermometer corresponding to IEC 60751

Class max. Tolerances (°C) Characteristics

RTD maximum error type TF

Cl. A ± (0.15 + 0.002 · |t|

1)

)

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)

A0008588-EN

Cl. AA,
former 1/3
Cl. B

± (0.1 + 0.0017 · |t|)

1)

Cl. B ± (0.3 + 0.005 · |t|

1)

)

1) |t| = absolute value °C

For measurement errors in °F, calculate using equations in °C, then multiply the outcome by 1.8.

Temperature ranges

Sensor type Operating

temperature range

Class B Class A Class AA

iTHERM
StrongSens

–50 to 500 °C
(–58 to 932 °F)

- –30 to 300 °C
(–22 to 572 °F)

0 to 200 °C
(32 to 392 °F)

iTHERM
QuickSens

–50 to 200 °C
(–58 to 392 °F)

- –30 to 200 °C
(–22 to 392 °F)

0 to 200 °C
(32 to 392 °F)

iTHERM TM412

12 Endress+Hauser

Sensor type Operating

temperature range

Class B Class A Class AA

Pt100 thin film
sensor (TF)

–50 to 200 °C
(–58 to 392 °F)

–50 to 200 °C
(–58 to 392 °F)

–30 to 200 °C
(–22 to 392 °F)

-

Pt100 wire­wound sensor
(WW)

–200 to 600 °C
(–328 to 1 112 °F)

- –100 to 450 °C
(–148 to 842 °F)

–50 to 250 °C
(–58 to 482 °F)

Influence of ambient
temperature

Depends on the head transmitter used. For details, see Technical Information. →  39

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 small
measurement current) is connected.

Response time

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

Response time without heat transfer paste

1)

Protection tube Shape of tip Insert

1x Pt100

iTHERM

QuickSens,

TF

1x Pt100

iTHERM

StrongSens

, TF

1x Pt100

wire

wound

WW

2x Pt100

wire

wound

WW

1x Pt100
standard

thin-film

TF

2x Pt100
standard
thin-film

TF

t50t

90t50t90t50t90t50t90t50t90t50t90

6.35 mm (¹⁄₄ in)

Reduced 4.76 mm (³⁄₁₆ in)

x 19.05 mm (0.75 in)

3 mm (0.12 in) 1.6 s 5.9 s - - 7.8 s 21.8 s 7.8 s 21.8 s - - - -

9.53 mm (³⁄₈ in)

Straight 6 mm (0.24 in) 8.5 s 47 s 25.9 s 80.9 s - - - - - - - -

Straight 6.35 mm (¹⁄₄ in) - - - - 23.6 s 67 s 21.8 s 65.2 s 18.4 s 55.8 s 18.4 s 55.8 s

Reduced 4.76 mm (³⁄₁₆ in)

x 19.05 mm (0.75 in)

3 mm (0.12 in) 1.5 s 5.5 s - - 8.4 s 23 s 8.4 s 23 s - - - -

12.7 mm (¹⁄₂ in)

Straight 6 mm (0.24 in) 8.2 s 34.8 s 23.4 s 70.6 s - - - - - - - -

Straight 6.35 mm (¹⁄₄ in) - - - - 20.1 s 55.4 s 21.3 s 61.8 s 17.9 s 51.5 s 17.9 s 51.5 s

Reduced 4.76 mm (³⁄₁₆ in)

x 19.05 mm (0.75 in)

3 mm (0.12 in) 1.8 s 6.2 s - - 8.8 s 24.1 s 8.8 s 24.1 s - - - -

1) If using a protection tube.

Response time for directly wired insert without transmitter.