iTHERM ModuLine TST434B
Industrial modular thermometer

Name: iTHERM ModuLine TST434B
Brand: Endress+Hauser
Availability: InStock

RTD thermometer for outdoor and indoor ambient temperature measurement

TST434B

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5-year warranty

Engineered for Confidence

Our Fundamental Selection instruments feature an extended 5-year warranty – a clear testament of our trust in their long-term reliability and performance.

Should a warranty case occur, you can count on a fast replacement process and minimal administrative effort – giving you peace of mind when it matters most and helping you keep your operations running smoothly.

Warranty terms apply

The extended warranty is subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

RTD sensor for ambient temperature measurement — iTHERM ModuLine TST434B RTD thermometer

Wall mounted indoor resistance thermometer — Suitable for wall mounting

iTHERM ModuLine TST434B RTD thermometer

Specs at a glance

Accuracy

class A acc. to IEC 60751
class B acc. to IEC 60751
Max. process pressure (static)

at 20 °C: 1 bar (15 psi)
Operating temperature range

PT 100:
-50 °C ...150 °C
(-58 °F ...302 °F)

See all specifications

Field of application

The iTHERM ModuLine TST434B RTD thermometer is specially designed for monitoring the room temperature in almost all industries.
It is available as a complete unit including Endress+Hauser temperature transmitters for enhanced measurement accuracy and reliability compared to directly wired sensors. With a variety of common and advanced outputs and communication protocols, they offer easy customizing.

Outdoor or indoor ambient temperature measurement
Maximum measuring range: –50 to +150 °C (–58 to +302 °F)
Degree of protection: IP66/68 (NEMA Type 4x encl.)

Benefits

Robust terminal heads according to DIN EN 50446 or stable plastic housings offer optimal protection from extreme ambient conditions
Reliable, long term stable and accurate indoor or outdoor ambient temperature measurement
Simple and fast wall mounting
Optional head transmitters: Analog 4 to 20 mA, HART®, PROFIBUS® PA, FOUNDATION Fieldbus™, IO-Link, PROFINET® over Ethernet-APL/SPE

Fundamental selection

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

Learn more about the FLEX selections

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Predecessor

RTD Thermometer TST434

Success stories

Maximize yield, minimize downtime

Maximize yield, minimize downtime - Smart temperature monitoring in High-Pressure Acid (HPAL) Leaching processes
Read the full story
High-quality instrumentation for cooling water systems

Torishima designs and builds large cooling water systems for customers in the Middle East, relying on Endress+Hauser instrumentation for the quality and performance of the products.
Read the full story
Temperature measurement in hydrogen production

Temperature measurement in hydrogen production with the iTHERM SurfaceLine TM611 - Non-invasive temperature measurement redefined
Read the full story
Precise and durable temperature control in preheaters

Precise and durable temperature control in preheaters - Boost efficiency, cut emissions and save energy in cement production
Read the full story
Automated inline self-calibration at Lonza

Automated inline self-calibration at Lonza for full monitoring throughout bioprocess
Read the full story

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Language:	English
Version:	02/12/2025
File size:	322.1 KB
File name:	EA_TS211_Klemmblock _ 7166054x _en_we.pdf

	EN
07/08/2024
30/11/2023
20/11/2018
16/01/2014

Language:	English
Version:	07/08/2024
File size:	773.6 KB
File name:	TI01140TEN_0424-00.pdf

	EN
07/08/2024
30/11/2023
20/11/2018
16/01/2014

Language:	English
Version:	07/08/2024
File size:	773.6 KB
File name:	TI01140TEN_0424-00.pdf

Language:	Japanese
Version:	27/11/2025
File size:	6.3 MB
File name:	IN01332TJA_0124_TST434B_eBrohure.pdf

Language:	German
Version:	20/03/2025
File size:	654.8 KB
File name:	AI01416T09DE01.25.pdf

Language:	Russian
Version:	26/08/2024
File size:	3.3 MB
File name:	2813 iTHERM 26.08.2024 to 26.08.2029.pdf

	EN
02/12/2025

	EN
20/02/2024

iTHERM ModuLine TST434BIndustrial modular thermometer

RTD thermometer for outdoor and indoor ambient temperature measurement

Specs at a glance

Accuracy

Max. process pressure (static)

Operating temperature range

Field of application

Benefits

Fundamental selection

Predecessor

Success stories

Maximize yield, minimize downtime

High-quality instrumentation for cooling water systems

Temperature measurement in hydrogen production

Precise and durable temperature control in preheaters

Automated inline self-calibration at Lonza

Measuring principle

Characteristic / Application

Thermowell / protection tube

Outer diameter protection tube / Insert

Material protection tube/ thermowell

Operating temperature range

Max. process pressure (static)

Accuracy

Integration head transmitter

Certification

Back

EA Klemmenblock für TS211

TI iTHERM ModuLine TST434B

TI iTHERM ModuLine TST434B

EA Klemmenblock für TS211

eBrochure iTHERM ModuLine TST434B

eBrochure iTHERM ModuLine TST434B

Temperature monitoring of the air-cooling system in hydroelectric power plants

Temperaturüberwachung des Luftkühlsystems in Wasserkraftwerken

Product family: Accessories: RTD insert, Accessories: TC insert, Accessories: Inserts, Magphant, Multipoint thermometers, Process RT D direct contact, Process RTD general purpose, Process RTD heavy duty, Process RTD hygienic, Process TC heavy duty, RTD thermometer

Product family: Process RTD general purpose

Product family: Process RTD direct contact, Process RTD general purpose, Process RTD heavy duty, Process RTD hygienic

Back

Terminal Head TA30A

Spare parts kit sealing TA30A/TA30D

iTEMP TMT31, Transmitter 4-20mA

iTEMP TMT36, Transmitter IO-Link

iTEMP TMT71, Transmitter 4-20mA

iTEMP TMT72, Transmitter HART

iTEMP TMT82, Transmitter HART

iTEMP TMT84, Transmitter PA

iTEMP TMT85, Transmitter FF

iTEMP TMT86, Ethernet Transmitter

Fixing kit cpl. TMT8x/7x USA(american)

Configuration Kit TXU10

Commubox FXA195

FieldPort SFP20

M12 cable for FieldPort SFP20

Set Terminal Block 3-wire TS211

Set Terminal Block 4-wire TS211

Set Terminal Block 6-wire TS211

Plug for Thermometer + Transmitter

Adapter M20x1.5 exter./M24x1.5 intern.VA

Screwed cable gland set 2x M20x1.5 IP68

Cable gland NPT1/2, D4.5-8.5 IP68

Input

Output

Power Supply

Input

Output

Power Supply

Input

Output

Display

Power Supply

Input

Output

Display

Power Supply

Input

Output

Power Supply

Input

Output

iTHERM ModuLine TST434B
Industrial modular thermometer