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TMR31 Compact thermometer

Metric RTD 4-20 mA compact thermometer for industrial applications

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TMR31 Compact thermometer

Metric RTD 4-20 mA compact thermometer for industrial applications

This product is stocked in various preconfigured variants that usually ship within just 2 working days.
Some variants in stock Some variants in stock
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Benefits

  • Small, compact design made entirely of stainless steel
  • Extremely short response times
  • Highly accurate even with short insertion lengths
  • 4-wire, Pt100 or PC-programmable transmitter with 4 to 20 mA output
  • Configuration and visualization with ReadWin® 2000 PC operating software, which is free of charge
  • Breakdown information in event of sensor break or sensor short-circuit, adjustable as per NAMUR NE43
  • Marine approval
FLEXible answers to individual needs
Current product

TMR31 Compact thermometer

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  • Easy to select, install and operate

What is FLEX?

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

Services by your side

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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Easy access to technical documentation

Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

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My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

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Product information

Specifications
Measuring / Application task Thermometer
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Description

With cost efficiency, optimal use of space, reliable operation, easy installation and commissioning the TMR31 fulfills the requirements of modern process measurement technology. Vibration-proof integrated thin-film sensors guarantee highest operational safety at the fastest response times.

Field of application

The TMR31 compact thermometers are used to measure temperatures from -50 °C to +150 °C (-58 °F to +302 °F), or up to +200 °C (+392 °F) with neck. The most common installation locations are tanks and pipes. TMR31 with process connections for general applications.

Benefits
  • Small, compact design made entirely of stainless steel
  • Extremely short response times
  • Highly accurate even with short insertion lengths
  • 4-wire, Pt100 or PC-programmable transmitter with 4 to 20 mA output
  • Configuration and visualization with ReadWin® 2000 PC operating software, which is free of charge
  • Breakdown information in event of sensor break or sensor short-circuit, adjustable as per NAMUR NE43
  • Marine approval
Predecessors
Omnigrad T TR470, . TSM470, U.S. Style Easytemp TSM470G
Downloads
Most downloaded
Technical Information (TI)
TI Compact thermometer TMR31, TMR35 Metric RTD 4-20 mA compact thermometer for industrial and hygienic applications
English version - 08/2025
Download
Operating Instruction (BA)
BA Compact thermometer TMR31, TMR35 Metric, compact RTD 4-20 mA thermometer for industrial and hygienic applications
English version - 08/2025
Download
Technical Information (TI)
TI Weld-in adapter, process adapter and flanges Level, pressure, temperature
English version - 06/2026
Download
The CAD Drawings will be available after the configuration.
All downloads
30 Downloads
Technical Information (TI)
TI Weld-in adapter, process adapter and flanges Level, pressure, temperature
English version - 06/2026
Download
Technical Information (TI)
Most downloaded
TI Compact thermometer TMR31, TMR35 Metric RTD 4-20 mA compact thermometer for industrial and hygienic applications
English version - 08/2025
Download
Operating Instruction (BA)
ReadWin® Quick Setup Operating Manual
ReadWin® Quick Setup Temperature
PC Software
English version - 02/2005
Download
Operating Instruction (BA)
Most downloaded
BA Compact thermometer TMR31, TMR35 Metric, compact RTD 4-20 mA thermometer for industrial and hygienic applications
English version - 08/2025
Download
Installation Instructions (EA)
Kabel Steckverbinder M12 IP69k 5m Kabel Steckverbinder M12 IP69k 5m
English version - 04/2026
Download
Installation Instructions (EA)
Kupplung für Anschlusskabel M12 Kupplung für Anschlusskabel M12
IP67,PG7, 4pol.M12, Kabelkonfektionierung
English version - 04/2026
Download
Installation Instructions (EA)
PCV Kabelset 4p D18 IP69K PCV Kabelset 4p D18 IP69K
English version - 04/2026
Download
Installation Instructions (EA)
Adapterkabel M12 TM311, TMR31, TMR35 Adapterkabel M12 TM311, TMR31, TMR35
English version - 04/2026
Download
Special Documentation (SD)
Device viewer Technical documentation in other languages
English version - 07/2021
Download
PU (Publication)
Temperature measurement Thermometers and transmitters for the process industry
English version - 07/2026
Download
Fields of Activities (FA)
Mesure de température Capteurs et transmetteurs de température pour les industries de process
French version - 12/2019
Download
Fields of Activities (FA)
Misura della temperatura Misura della temperatura
Termometri e trasmettitori per l'industria di processo
Italian version - 07/2024
Download
Fields of Activities (FA)
Temperaturmesstechnik Thermometer und Transmitter für die Prozessindustrie
German version - 02/2025
Download
Fields of Activities (FA)
Temperature measurement Thermometers and transmitters for the process industry
English version - 02/2025
Download
Fields of Activities (FA)
Misura della temperatura Termometri e trasmettitori per l'industria di processo
Italian version - 02/2020
Download
Fields of Activities (FA)
温度計 プロセス産業向けの温度計
および伝送器
Japanese version - 02/2020
Download
Fields of Activities (FA)
Catálogo medición temperatura Termómetros y transmisores para la industria de proceso
Spanish version - 04/2018
Download
Competence Brochure (CP)
Catálogo soluciones esenciales Alta calidad a precios competitivos
Spanish version - 01/2017
Download
Case Study (CS)
Надежный контроль дренирования воды для эффективной добычи руды ТОО «Бакырчикское горнодобывающее предприятие»
доверяет измерительным технологиям Endress+Hauser
Russian version - 05/2019
Download
Case Study (CS)
Advanced water drainage control for efficient ore extraction LLP Bakyrchik Mining Venture trusts Endress+Hauser
measuring technologies
English version - 05/2019
Download
Manufacturer Declaration
Product family: Controller, Process RTD general purpose, Process RTD heavy duty, Process RTD hygienic, RTD thermometer Product root: FML621-, TM101-, TM111-, TM121-, TM151-, TM311-, TM401-, TMR31-, TMR35-, TR15-, TR65-, TR66-, TTR31-, TTR35-
Declaration number: ЕАЭС KZ 7500533.13.12.04163
Manufacturer specification: EMC
Russian version - 08/2024
Download
Manufacturer Declaration
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 root: DTT31-, DTT35-, TAF11-, TAF12D-, TAF12S-, TAF12T-, TAF16-, TC15-, TC65-, TC66-, TH11-, TM101-, TM111-, TM112-, TM121-,
TM131-, TM151-, TM152-, TM311-, TM371-, TM372-, TM401-, TM402-, TM411-, TM412-, TM611-, TMR31-, TMR35-, TMS01-, TMS02-, TMS11-, TMS
12-, TMS21-, TMS31-, TPR100-, TPR300-, TR15-, TR65-, TR66-, TS111-, TS211-, TS901-, TST434B-, TTR31-, TTR35-
Declaration number: HE_02286_01.25
Manufacturer specification: RoHS
Additional information: China RoHS
English version - 12/2025
Download
EU Declaration
Product family: RTD thermometer Product root: TMR31-, TMR35-
Declaration number: EC_00335_01.16
English version - 04/2016
Download
EU Declaration
Product family: Industrial modular thermometer, Low cost RTD general purpose, Magphant, Plugs RTD direct contact, Process RTD direct contact, Process RTD direct in contact, Process RTD explosion proof, Process RTD general purpose, Process RTD heavy duty, Process R TD hygienic, Process TC direct contact, Process TC direct in contact, Process TC explosion proof, Process TC general purpose, Proces s TC heavy duty, RTD thermometer, TC heavy duty Product root: DTT31-, DTT31L-, DTT35-, DTT35L-, GPTL-, MLTTS00-, MLTTS01-, OTR31-, OTR35-, OTR90-, OTR91-, OTR92-, OTR93-, OTR94-, O
TR95-, OTR96-, TMR31-, TMR31L-, TMR35-, TMR35L-, TMT470L-, TTR31-, TTR35-
Declaration number: EC_00568_03.24
English version - 02/2024
Download

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TMR31 Compact thermometer
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Spare parts and accessories

further parts
further parts

Spare parts kit copper ring G1/2

further parts
further parts
Order code 71367414
further parts
further parts

Compression Fitting TA50

further parts
further parts
Order code TA50-
further parts
further parts

Spare part kit TA50-GB/NB/HB/PB/BB/CB/DB

further parts
further parts
Order code 71744221
further parts
further parts

Spare part kit TA50-GP/NP/HP/PP/BP/CP/DP

further parts
further parts
Order code 71744222
Spare parts and accessories

Selection of compatible products

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