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iTHERM ModuLine TST90 Industrial modular thermometer

Paired set of metric RTD thermometers for thermal energy measurements

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iTHERM ModuLine TST90 Industrial modular thermometer

Paired set of metric RTD thermometers for thermal energy measurements

Get a quote
Office situation support
Have questions about this product?

Benefits

  • Fast replaceability of the insert
  • High degree of insert compatibility and design as per DIN 43772
  • Fast response time with reduced tip
FLEXible answers to individual needs
Current product

iTHERM ModuLine TST90 Industrial modular thermometer

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  • High-end products
  • Highly functional and convenient

What is FLEX?

FLEX selections
Technical excellence
Simplicity
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Fundamental selection Meet your basic measurement needs
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Extended selection Optimize your processes with innovative technologies
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Xpert selection Master your most challenging applications
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Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

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Warranty terms apply

The manufacturer's warranty and extended warranty are 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.

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Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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Product information

Product picture of resistance thermometer TST90
TST90
Specifications
Measuring / Application task Thermometer
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Description

The thermometer is mainly used in the chemical industry but also finds its use in other branches. The device is used for high-precision measurement of temperature differences with matched sensor pairs. A variety of dimensions offers flexible application possibilities.

Field of application
  • Universally usable for thermal energy measurements
  • Measuring range: -50 to +400 °C (-58 to +752 °F)
  • Paired in the range: 0 to +120 °C (+32 to +248 °F), Deviation of the sensors: ± 0.05 K
  • Paired in the range: –40 to 0 °C (-40 to 32 °F), Deviation of the sensors: ± 0.1 K
  • Protection class: up to IP68
Benefits
  • Fast replaceability of the insert
  • High degree of insert compatibility and design as per DIN 43772
  • Fast response time with reduced tip
Downloads
Most downloaded
Operating Instruction (BA)
BA iTHERM ModuLine thermometer Universal, modular RTD/TC thermometers for a wide range of industrial applications
English version - 08/2025
Download
Technical Information (TI)
Omnigrad TST90, TET90 New version Resistance thermometer and insert
English version - 03/2013
Download
Technical Information (TI)
Omnigrad TST90 Old version (04.2001) RTD Pt100 matched thermometer
English version - 04/2001
Download
The CAD Drawings will be available after the configuration.
All downloads
13 Downloads
Technical Information (TI)
Most downloaded
Omnigrad TST90, TET90 New version Resistance thermometer and insert
English version - 03/2013
Download
Technical Information (TI)
Omnigrad TST90 Old version (04.2001) RTD Pt100 matched thermometer
English version - 04/2001
Download
Operating Instruction (BA)
Most downloaded
BA iTHERM ModuLine thermometer Universal, modular RTD/TC thermometers for a wide range of industrial applications
English version - 08/2025
Download
Installation Instructions (EA)
Feldgehäuse TA20B Feldgehäuse TA20B
English version - 04/2025
Download
Installation Instructions (EA)
Feldgehäuse TA30A Feldgehäuse TA30A
English version - 05/2026
Download
Installation Instructions (EA)
Feldgehäuse TA30D Feldgehäuse TA30D
English version - 05/2026
Download
Special Documentation (SD)
Device viewer Technical documentation in other languages
English version - 07/2021
Download
Case Study (CS)
Energieeffizienzoptimierung Erfassung und Analyse des Heiz-
wärmebedarfs im Schulhaus
Ettingen
German version - 11/2025
Download
EU Declaration
Product family: Low cost RTD general purpose, Process RTD direct contact, Process RTD direct in contact, Process RTD general purpose , Process RTD heavy duty, Process RTD hygienic, Process TC direct contact, Process TC direct in contact, Process TC general purpose, Process TC heavy duty, RTD thermometer, TC heavy duty Product root: TAF11-, TAF12D-, TAF12S-, TAF12T-, TAF16-, TC10-, TC12-, TC13-, TC15-, TC61-, TC62-, TC63-, TC65-, TC66-, TC88-, TEC42
0-, TH11-, TH12-, TH13-, TH14-, TH15-, TH17-, TH18-, TH27-, TH51-, TH52-, TH53-, TH54-, TH55-, TH56-, TM101-, TM111-, TM112-, TM121-
, TM131-, TM151-, TM152-, TM401-, TM402-, TM411-, TM412-, TM611-, TMT142C-, TMT142R-, TMT162C-, TMT162R-, TR10-, TR11-, TR12-, TR13-
, TR15-, TR24-, TR25-, TR44-, TR45-, TR46-, TR47-, TR48-, TR61-, TR62-, TR63-, TR65-, TR66-, TR88-, TSC310-, TSM187-, TSM487-, TST18
7-, TST310-, TST40N-, TST410-, TST414-, TST41N-, TST434-, TST434B-, TST487-, TST602-, TST90-
Declaration number: EC_00136_04.24
English version - 02/2024
Download
Metrology
Product family: Low cost RTD general purpose, Process RTD direct contact, PROCESS RTD EXPLOSION PROOF, Process RTD general purpose, PROCESS RTD HEAVY DUTY, RTD THERMOMETER ZONE "0" Product root: TST10-, TST11-, TST110-, TST111-, TST12-, TST120-,
TST121-, TST130-, TST131-, TST140-, TST141-, TST210-, TST220-, TST221-,
TST262-, TST264-, TST310-, TST410-, TST414-, TST42-, TST420-, TST72-,
TST80-, TST90-
Region: Romania
Approval agency: BRML
Romanian version - 06/2006
Download
Metrology
Product family: Accessories: RTD insert, Accessories: TC insert, Accessories: Inserts, Process RTD direct contact, Process RTD gener al purpose, Process RTD heavy duty Product root: TEC300-, TET300-, TM101-, TM111-, TM121-, TM131-, TPC100-, TPC200-, TPC300-, TPR100-, TPR300-, TR10-, TR11-, TR12-, TR
13-, TR15-, TR24-, TR25-, TR61-, TR62-, TR63-, TR65-, TR66-, TR88-, TS111-, TS211-, TST310-, TST90-
Region: Uzbekistan
Approval agency: UZS
Approval number: 02-2.0171
Metrology type: Metrology
Russian version - 08/2022
Download
Metrology
Product family: Process RTD direct contact, Process RTD general purpose, Process RTD heavy duty, Process RTD hygienic Product root: TM151-, TM411-, TR15-, TR65-, TR66-, TST310-, TST434-, TST434B-, TST90-
Region: Kazakhstan
Approval agency: KazInMetr
Approval number: 2813
Metrology type: Metrology
Russian version - 08/2024
Download
Tender Text
Omnigrad M, TST 90 Komplette, gepaarte Widerstandsthermometer für Wärmemengenmessung
German version - 12/2012
Download

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Terminal Head TA30A

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Product picture of resistance thermometer TST90
TST90

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Spare parts

further parts
further parts

Terminal Head TA30A

further parts
further parts
Order code TA30A-
further parts
further parts

Terminal Head TA30D

further parts
further parts
Order code TA30D-
further parts
further parts

Terminal Head TA20B

further parts
further parts
Order code TA20B-
further parts
further parts

RTD Insert TET90 (1 pair)

further parts
further parts
Order code TET90-
Spare parts

Selection of compatible products

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