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Thermophant T TTR31 Temperature switch

Metric RTD compact thermometer with switch output for industrial applications

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Thermophant T TTR31 Temperature switch

Metric RTD compact thermometer with switch output for industrial applications

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Benefits

  • Integrated switching electronics for decentralized and economic process monitoring and control
  • High reproducibility and long-term stability
  • Function control and information on site thanks to LEDs and digital display
  • Long-term stable temperature sensor made of platinum (Pt100 class A as per IEC 60751)
  • High accuracy across the entire ambient temperature range and short response time
  • Operation and visualisation also with PC and FieldCare or ReadWin 2000 configuration software
  • DESINA-compliant
FLEXible answers to individual needs
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Thermophant T TTR31 Temperature switch

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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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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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Product information

Product picture temperature switch thermophant TTR31
TTR31
Specifications
Measuring / Application task Temperature switch
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Description

Cost efficiency, optimal use of space, reliable operation, easy installation and commissioning indicate modern process measuring technology. The temperature switch completely fulfills these requirements. Designed for the safe measurement and monitoring of process temperatures it can be selected between one or two switch outputs as well as one switch output and one standardized analog output. Vibration-proof integrated thin-film sensors guarantee highest operational safety.

Field of application

Temperature switch for the monitoring, display and control of process temperatures in a range from -50 to 150 °C (-58 to 302 °F). Thermophant T TTR 31- with thread connections or coupling.

Electronic versions:

  • One PNP switch output
  • Two PNP switch outputs
  • 2 x PNP switch outputs or one PNP switch output and 4 to 20 mA output (active)
Benefits
  • Integrated switching electronics for decentralized and economic process monitoring and control
  • High reproducibility and long-term stability
  • Function control and information on site thanks to LEDs and digital display
  • Long-term stable temperature sensor made of platinum (Pt100 class A as per IEC 60751)
  • High accuracy across the entire ambient temperature range and short response time
  • Operation and visualisation also with PC and FieldCare or ReadWin 2000 configuration software
  • DESINA-compliant
Downloads
Most downloaded
Technical Information (TI)
TI Thermophant T TTR31, Thermophant T TTR35 Metric, compact RTD thermometer with switch output for industrial and hygienic applications
English version - 12/2025
Download
Operating Instruction (BA)
BA Thermophant T TTR31, Thermophant T TTR35 Temperature switch
English version - 12/2025
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
26 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 Thermophant T TTR31, Thermophant T TTR35 Metric, compact RTD thermometer with switch output for industrial and hygienic applications
English version - 12/2025
Download
Operating Instruction (BA)
Most downloaded
BA Thermophant T TTR31, Thermophant T TTR35 Temperature switch
English version - 12/2025
Download
Operating Instruction (BA)
ReadWin® Quick Setup Operating Manual
ReadWin® Quick Setup Temperature
PC Software
English version - 02/2005
Download
Operating Instruction (BA)
Temperature switch Thermophant T TTR31, TTR35 device release: 01.01. - 01.02. Temperature switch for the safe measurement, monitoring and control of
process temperatures
English version - 02/2005
Download
Short Instruction (KA)
Operating manual Temperature Switch Thermophant T TTR 31, TTR 35 Temperature switch for the safe measurement, monitoring and control of
process temperatures
English version - 05/2004
Download
Installation Instructions (EA)
Kupplung für Anschlusskabel M12 Kupplung für Anschlusskabel M12
IP67,PG7, 4pol.M12, Kabelkonfektionierung
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
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: TTR31-, TTR35-
Declaration number: EC_00350_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
UK Conformity Assessed
Product family: Magphant, RTD thermometer Product root: DTT31-, DTT35-, TTR31-, TTR35-
Declaration number: UK_00475_01.21
Additional information: UK Doc NonEx
English version - 12/2021
Download
Hygienic equipment
Product family: RTD thermometer Product root: TMR31-, TMR35-, TTR31-, TTR35-
Region: Poland
Approval agency: PZH
Polish version - 09/2020
Download
Metrology
Product family: RTD thermometer Product root: TTR31-, TTR35-
Region: Uzbekistan
Approval agency: UZS
Approval number: 02-2.0167
Metrology type: Metrology
Russian version - 08/2022
Download

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Spare parts and accessories

further parts
further parts

Gasket rubber cap CDI-connector

further parts
further parts
Order code 71535688

Cable M12x1 l=5m

Order code 51005148

Collar welded socket d6 PEEK + screw

Order code 71535690

Collar welded socket d6 PEEK w/o screw

Order code 71535691
Spare parts & accessories
Product picture temperature switch thermophant TTR31
TTR31

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Spare parts and accessories

further parts
further parts

Gasket rubber cap CDI-connector

further parts
further parts
Order code 71535688

Cable M12x1 l=5m

Order code 51005148

Collar welded socket d6 PEEK + screw

Order code 71535690

Collar welded socket d6 PEEK w/o screw

Order code 71535691
Spare parts & accessories

Selection of compatible products

/