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iTHERM ModuLine TT151 Barstock thermowell

Metric thermowell for a wide range of heavy duty industrial applications

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iTHERM ModuLine TT151 Barstock thermowell

Metric thermowell for a wide range of heavy duty industrial applications

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Benefits

  • TT151 is an industry standard thermowell manufactured from round barstock
  • Modular configuration according to DIN 43772, ASME B40.9, NAMUR NE 170 or more flexible as universal version
  • Extension, immersion length and total length can be chosen according to process requirements
  • Wide range of dimensions, materials and process connections available
  • iTHERM TwistWell in helical design - reducing vortex induced vibrations in high-velocity applications

Integrated technologies

iTHERM TwistWell – thermowell with helical design
FLEXible answers to individual needs
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iTHERM ModuLine TT151 Barstock thermowell

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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
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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.

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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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Technology

iTHERM TwistWell – thermowell with helical design

The helical thermowell for harsh process conditions where standard thermowells fail due to vortex-induced vibrations!

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Product information

Bar stock thermowell iTHERM TT151 for use in heavy duty industrial applications
Bar stock thermowell - TT151
Specifications
Measuring / Application task Thermowell
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Description

The TT151 thermowell is designed as per DIN 43772, ASME B40.9, NAMUR NE 170 norms or as individual configuration. The robust protection tube ensures safe and accurate measurements in process lines or vessels, shielding temperature sensors from harsh environments. It is drilled and machined from solid bar stock with root diameters from 9 to 50 mm. Tips are available in straight, tapered or stepped form. Process connections include a selection of standard flanges, threads or weld-in versions.

Field of application
  • Protects the temperature sensor against physical and chemical stress
  • High robustness for challenging process conditions
  • Pressure range: up to 500 bar (7252 psi)
  • For use in pipes, vessels or tanks
  • Easier maintenance and recalibration of the measuring point (sensor can be replaced without interrupting the process)
Benefits
  • TT151 is an industry standard thermowell manufactured from round barstock
  • Modular configuration according to DIN 43772, ASME B40.9, NAMUR NE 170 or more flexible as universal version
  • Extension, immersion length and total length can be chosen according to process requirements
  • Wide range of dimensions, materials and process connections available
  • iTHERM TwistWell in helical design - reducing vortex induced vibrations in high-velocity applications
Downloads
Most downloaded
Technical Information (TI)
TI iTHERM ModuLine TT151 Barstock thermowell
English version - 10/2025
Download
Operating Instruction (BA)
Thermowells for thermometers Universal thermowells for thermometers in industrial applications
English version - 08/2020
Download
Special Documentation (SD)
Device viewer Technical documentation in other languages
English version - 07/2021
Download
The CAD Drawings will be available after the configuration.
All downloads
16 Downloads
Technical Information (TI)
Most downloaded
TI iTHERM ModuLine TT151 Barstock thermowell
English version - 10/2025
Download
Operating Instruction (BA)
Most downloaded
Thermowells for thermometers Universal thermowells for thermometers in industrial applications
English version - 08/2020
Download
Special Documentation (SD)
Device viewer Technical documentation in other languages
English version - 07/2021
Download
Special Documentation (SD)
SD IEC 61406-1 Automatic identification of physical objects
English version - 05/2023
Download
PU (Publication)
Temperature measurement Thermometers and transmitters for the process industry
English version - 07/2026
Download
Innovation (IN)
iTHERM TwistWell TT151 TT152 Schutzrohr aus Vollmaterial mit Spiralform für
Anwendungen mit hohen Fließgeschwindigkeiten
German version - 10/2024
Download
Innovation (IN)
Ridurre la complessità, raggiungere la semplicità. Ridurre la complessità,
raggiungere la semplicità.
iTHERM ModuLine — facile da configurare
in base alle vostre esigenze.
Italian version - 04/2025
Download
Innovation (IN)
Reduce complexity, achieve simplicity. iTHERM ModuLine — easily configurable
to your needs.
English version - 02/2026
Download
Innovation (IN)
Komplexität reduzieren, Einfachheit erreichen. iTHERM ModuLine – einfach konfigurierbar für Ihre Bedürfnisse.
German version - 02/2026
Download
Innovation (IN)
iTHERM TwistWell TT151 TT152 Barstock thermowell with
helix design for high
velocity applications
English version - 10/2024
Download
White paper (WP)
iTHERM TwistWell TT151 / TT152 Barstock thermowell with helical design
for high velocity applications. The alternative
for harsh process conditions where standard thermowells
fail due to vortex induced vibrations.
English version - 05/2025
Download
AI (Application note)
Höchste Dampfqualität in Abhitzekesselanlagen mit iTHERM TwistWell Schutzrohr
German version - 06/2025
Download
AI (Application note)
Achieving highest steam quality in HRSG systems with iTHERM TwistWell thermowell design
English version - 06/2025
Download
Manufacturer Declaration
Product family: Accessories: Bar stock thermowell, Accessories: Pipe thermowell, Accessories: Inserts, Magphant, Process RTD general purpose, Process RTD hygienic, RTD thermometer Product root: DTT31-, DTT35-, TK40-, TM101-, TM111-, TM121-, TM131-, TM311-, TM371-, TM372-, TM401-, TM402-, TM411-, TM412-, TMR35-,
TS111-, TS212-, TT131-, TT151-, TT411-, TT412-
Declaration number: HE_01494_02.26
Manufacturer specification: Food hygiene
Additional information: BSE, TSE
English version - 07/2026
Download
Product Carbon Footprint Information
Product family: Accessories: Bar stock thermowell Product root: TT151-
Declaration number: ED_00166_01.24
English version - 09/2024
Download
Pressure Equipment
Product family: Accessories: Bar stock thermowell, Process RTD general purpose Product root: TM151-, TM152-, TT151-, TT152-
Region: Canada
Approval agency: CRN
English version - 01/2024
Download

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Bar stock thermowell iTHERM TT151 for use in heavy duty industrial applications
Bar stock thermowell - TT151

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