Name: Thermowell TA556
Brand: Endress+Hauser
Availability: InStock

TA556 Barstock thermowell

Phase out

Product is getting phased out

Phase out Product status

TA556 Barstock thermowell

New alternatives available

Successor

iTHERM ModuLine TT151

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 TA556

Name TA556 Barstock thermowell

Product status In phase out

Phase out date 8/2025

Order stop 12/2027

Spare sensor until not applicable

Calibration until not applicable

Spares available not applicable

Repair until not applicable

New alternative TT151

Maintenance advice

Made of drilled barstock material. Mainly used in heavy duty or general purpose applications.

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TA556 Barstock thermowell

Phase out

Made of drilled barstock material. Mainly used in heavy duty or general purpose applications.

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Successors

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

iTHERM ModuLine TT151

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iTHERM ModuLine TT151

Metric thermowell for a wide range of heavy duty industrial applications

Benefits

The extension and the immersion lengths as well as the bar dimensions can be chosen according to process requirements
A wide choice of standard materials and process connections is available; other versions can be ordered according to specification
Different grades of surface finishing are also available
The thermowell stem shape is stepped
The process connection can be threaded or flanged weld

Services and resources

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

FLEXible answers to individual needs

Current product

TA556 Barstock thermowell

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.

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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.

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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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.

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Product information

Specifications

Description

Due to the challenging process conditions by heavy duty applications the load capacity of a thermowell must be calculated exactly. Dye penetration tests, ultrasound test, helium leakage test, pressure endurance test as well as various, non-destructive material tests prove the quality of materials and processing.

Field of application

TA556 is designed for use with resistance and thermocouple thermometers mainly in heavy duty applications.

Benefits

The extension and the immersion lengths as well as the bar dimensions can be chosen according to process requirements
A wide choice of standard materials and process connections is available; other versions can be ordered according to specification
Different grades of surface finishing are also available
The thermowell stem shape is stepped
The process connection can be threaded or flanged weld

Downloads

Most downloaded

Technical Information (TI)

Technical Information Omnigrad TA series
Industrial protecting tubes

English version - 09/2005

Download

Technical Information (TI)

Technical information TA556 Industrial protecting tube
omnigrad TA556
Heavy duty - General purpose
From round bar stock - Ø 35 mm
1" NPT threaded or flanged weld type
Also ENI BAR 3 & BAR 4

English version - 05/2001

Download

Operating Instruction (BA)

Thermowells Operating instructions for thermowells for EAC approval

English version - 12/2016

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

Spare parts and accessories

further parts

The unit is not repairable

further parts

Spare parts and accessories

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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Configuration details

TA556

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CAD Drawings

Configuration support

Spare parts and accessories

further parts

The unit is not repairable

further parts

Spare parts and accessories

Measuring principle	Bar stock Thermowell
Characteristic / Application	metric style various process connections round extension
Head connection	internal thread: 3/4" NPT
Maximum standard immersion length	900 mm (35,43")
Max. immersion length on request	5.000 mm (196,85")
Process connection	thread: 1" NPT flange: ASME 1" 300 RF (B16.5) ASME 1" 600 RF (B16.5) ASME 1 1/2" 150 RF (B16.5) ASME 1 1/2" 300 RF (B16.5) ASME 1 1/2" 600 RF (B16.5) ASME 1 1/2" 600 RTJ (B16.5) ASME 2" 300 RF (B16.5) ASME 2" 600 RF (B16.5) ASME 2" 300 RTJ (B16.5) ASME 2" 600 RTJ (B16.5)
Thermowell root diameter	25 mm (0,98")
Medium contact material	1.4401 (316) 1.4404 (316L) 1.4571 (316Ti)
Wetted part finishing (Ra)	< 0.8 μm (31.50 μin) < 1.6 μm (63.00 μin)
Tip shape	straight tapered
Temperature range	-200...700 °C (-328...1.292 °F)
Max. process pressure (static)	500 bar (7252 psi)
Max. process pressure at 400 °C	300 bar (4351 psi)

Product is getting phased out

New alternatives available

Phase out policy