Name: TC-Assembly U.S.Style TH51
Brand: Endress+Hauser
Availability: InStock

TH51 Modular TC thermometer, US style

Phase out

Product is getting phased out

Phase out Product status

TH51 Modular TC thermometer, US style

New alternatives available

Successor

iTHERM ModuLine TM112

Phase out policy
Compare products

Phase out policy

Endress+Hauser are committed to the long term support of all our products

We undertake support and service for our products for a period of ten years after notice of product withdrawal (until spareparts are not available any more)

However we reserve us the right to offer alternative solutions including replacement products if deemed more appropriated.

Product status

Product root TH51

Name TH51 Modular TC thermometer, US style

Product status In phase out

Phase out date 5/2026

Order stop 12/2027

Spare sensor until not applicable

Calibration until 11/2033

Spares available 11/2033

Repair until 11/2033

New alternative TM112

Maintenance advice

Best in class temperature measurement technology for general applications

Have questions about this product?

TH51 Modular TC thermometer, US style

Phase out

Best in class temperature measurement technology for general applications

Get a quote

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Successors

Imperial temperature sensor without thermowell

iTHERM ModuLine TM112

Compare

iTHERM ModuLine TM112

Imperial RTD/TC direct contact thermometer for a wide range of industrial applications

Benefits

One source shopping for temperature measurement solutions. World class transmitter with integrated sensor offering. Remove and install straight out of the box!
Improved galvanic isolation on most devices (2 kV)
Simplified model structure: Competitively priced, offers great value. Easy to order and reorder. A single model number includes sensor and transmitter assembly for a complete point solution.
All iTEMP® transmitters provide long term stability ≤ 0.05 % per year

Services and resources

Product Support Product documentation, troubleshooting articles, device details and more.

FLEXible answers to individual needs

Current product

TH51 Modular TC thermometer, US style

High-end products
Highly functional and convenient

What is FLEX?

FLEX selections

Technical excellence

Simplicity

Fundamental selection Meet your basic measurement needs

Lean selection Handle your core processes easily

Extended selection Optimize your processes with innovative technologies

Xpert selection Master your most challenging applications

Variable

Learn more about the FLEX selections

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.

Learn more

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.

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.

Learn more

24/7 customer portal

Personalized transaction space

Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

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.

My Endress+Hauser – all in one place

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.

Product information

Specifications

Description

The high modular thermometer is used for several applications in almost all industries. Examples are heat exchangers, furnaces, dryers, process reactors, etc. With different head transmitter it's a complete unit ready for use with enhanced measurement accuracy and reliability. It also enables very fast response times, due to direct contact measurement without thermowell. A variety of process connections and dimensions offer flexible application possibilities.

Field of application

Magnesium oxide insulated thermocouples, commonly referred to as MgO thermocouples, are used in many process and laboratory applications. They have many desirable characteristics making thermocouples a good choice for general and special purpose applications.

The sensors can be used on:

Heat exchangers
Power & recovery areas
Furnaces
Dryers
Flue gas
Compressor stations
Process reactors
Metallurgical and glass manufacturing

Benefits

One source shopping for temperature measurement solutions. World class transmitter with integrated sensor offering. Remove and install straight out of the box!
Improved galvanic isolation on most devices (2 kV)
Simplified model structure: Competitively priced, offers great value. Easy to order and reorder. A single model number includes sensor and transmitter assembly for a complete point solution.
All iTEMP® transmitters provide long term stability ≤ 0.05 % per year

Downloads

Most downloaded

Technical Information (TI)

TI TH51, TH52 and TH56 General purpose MgO insulated thermocouples with connection head, extension lead wires or connectors for process and laboratory appl
ications

English version - 01/2025

Download

Short Instruction (KA)

TH51 Compact Instructions Thermocouple assembly

English version - 02/2013

Download

Installation Instructions (EA)

iTEMP TMT72 Transmitter HART iTEMP TMT72 Transmitter HART
Bild für SFT

English version - 05/2026

Download

The CAD Drawings will be available after the configuration.

More options

Download page as PDF Search downloads by serial number

More options

Download page as PDF Search downloads by serial number

All downloads

Selection of compatible products

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

Product picture loop-powered indicator RIA15

RIA15 process indicator

Loop-powered Ex ia process indicator as field or control panel device for 4 to 20 mA signals or HART®protocol

Product picture process transmitter RMA42

RMA42 process transmitter with control unit

4-wire process transmitter with control unit as DIN rail device with up to two universal sensor inputs and optional SIL approval

HAW569 surge protective device

Surge protective device for installation in the field device for power supply and communication signals optional with SIL and Ex approval

Loop-powered process indicator RIA16 for field mounting

RIA16 process indicator

Loop-powered Ex ia process indicator as field device for 4 to 20 mA signals, HART® transparent

Spare parts

further parts

Gasket 67.5x2.9x1.5 VMQ/PTFE, 5 pieces

further parts

Order code 52028179

further parts

Display LC for TA20J

further parts

Order code 60017971

further parts

Housing filter plastic F15, 3 pieces

further parts

Order code 71043745

Display

Terminal Head TA30H

Display

Order code TA30H-

Drawing number A

Spare parts

Choose from our suggested options

Looking for more options?

Use the extended configuration to configure from all available options.

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Configure from all available options Use extended configuration

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Add to cart

More actions

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Configuration details

TH51

Section	ID	Selected option
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CAD Drawings

Configuration support

Spare parts

further parts

Gasket 67.5x2.9x1.5 VMQ/PTFE, 5 pieces

further parts

Order code 52028179

further parts

Display LC for TA20J

further parts

Order code 60017971

further parts

Housing filter plastic F15, 3 pieces

further parts

Order code 71043745

Display

Terminal Head TA30H

Display

Order code TA30H-

Drawing number A

Spare parts

Selection of compatible products

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

RIA15 process indicator

Loop-powered Ex ia process indicator as field or control panel device for 4 to 20 mA signals or HART®protocol

RMA42 process transmitter with control unit

4-wire process transmitter with control unit as DIN rail device with up to two universal sensor inputs and optional SIL approval

HAW569 surge protective device

Surge protective device for installation in the field device for power supply and communication signals optional with SIL and Ex approval

RIA16 process indicator

Loop-powered Ex ia process indicator as field device for 4 to 20 mA signals, HART® transparent

Measuring principle	Thermocouple
Characteristic / Application	US style modular temperature assembly threaded process connection
Thermowell / protection tube	without (not intended to use with thermowell)
Insert / probe	mineral insulated (MI), flexible
Outer diameter protection tube / Insert	1/8'' (3,18 mm) 3/16''(4,76 mm) 1/4'' (6,35 mm) 3/8'' (9,53 mm)
Max. immersion length on request	up to 96" (2.438 mm) others on request
Material protection tube/ thermowell	316 Alloy 600
Optional coating	Not applicable
Process connection	male thread: G1/2" NPT1/2" compression fitting: NPT1/8" NPT1/4"
Tip shape	straight
Surface roughness Ra	Not defined
Operating temperature range	Type T: -270 °C ...400 °C (-454 °F ...752 °F) Type J: -210 °C ...1.200 °C (-346 °F ...2.192 °F) Type E: -270 °C ...1.000 °C (-454 °F ...1.832 °F) Type K: -270 °C ...1.372 °C (-454 °F ...2.500 °F) Type N: -270 °C ... 1.300 °C (-454 °F ...2.372 °F)
Max. process pressure (static)	at 20°C: 250 bar (3.626 psi) depends on configuration
Accuracy	Standard acc. to ASTM E-230 Special acc. to ASTM E-230
Response time	63% rt = 0.3 s
Integration head transmitter	yes (4 … 20 mA; HART; PROFIBUS PA; FOUNDATION FIELDBUS)
Ex - approvals	transmitter only FM IS CSA IS FM/CSA IS
Certification	SIL (transmitter only)

Product is getting phased out

New alternatives available

Phase out policy

Product status