TW251
Protection tube for temperature sensors

The protection tube with built-in compression fitting allows varying types of probes to be applied

TW251

Compare

Specs at a glance

Max. process pressure (static)

50 bar (725 psi)
Maximum standard immersion length

4.000 mm (157,48")
Max. immersion length on request

10.000 mm (393,7")

See all specifications

Field of application

This protection tube is well fitted with an integrated compression fitting, suitable for different industrial applications including even hygienic applications. By default, it is fitted onto pipes and vessels or tanks where attachment to the process can be threaded or welded. Due to its construction various types of temperature probes, such as compact thermometers as well as assemblies without a protection tube or cable probes, generally with an probe diameter of 6 mm, can be applied.

TW251 is a tube well fitted with an integrated compression fitting, suitable for different industrial applications including hygienic applications.

Benefits

The compression fitting allows for the replacement of the faulty probes without having to suspend the process underway
Different process connections can be selected as standard within the sales structure: Threaded (G ½", G ¼", NPT ½", ...); Weld-in (cylindrical, spheric)
Sleeves for the compression fitting available in PTFE or SS 316
The 3.1.B material certificate (according to standard EN 10204), is selectable directly from the sale structure of the product

Fundamental selection

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

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

Learn more about the FLEX selections

Loading alternative products

Predecessor

TA250

Success stories

Prevent grain dust ignition in bulk tanks & silos

How temperature profiling increases plant safety and product quality in bulk tanks and silos for food storage.
Read the full story
Self-calibrating thermometers in hygienic processes

This white paper explains how self-calibrating thermometers can be used in hygienic process engineering. It details theory and practice as well as application examples. Learn more!
Read the full story
Medical autoclaves

New sensor technology automates recalibrations to reduce risk in batch sterilization. Learn More!
Read the full story
Automated inline self-calibration at Lonza

Automated inline self-calibration at Lonza for full monitoring throughout bioprocess
Read the full story
Iplom enhances catalyst life, process safety and efficiency

Iplom SpA sought to optimize its refining process to extend catalyst life and to increase safety in a hydrodesulfurization (HDS) application through precise 3D temperature profiling.
Read the full story

Measuring principle

Fabricated Thermowell
Characteristic / Application

metric style
for probes with diameter 6 mm (0,24") and 9 mm (0,35")
threaded or welded process connection
Head connection

compression fitting
Maximum standard immersion length

4.000 mm (157,48")
Max. immersion length on request

10.000 mm (393,7")
Process connection

thread:
G1/4"
G1/2"
1/2" NPT
weld-in adapter cylindrical
weld-in adapter spherical
Thermowell root diameter

6 mm (0,24")
9 mm (0,35")
Medium contact material

1.4404 (316L)
Wetted part finishing (Ra)

< 0.4 μm (15.75 μin)
< 0.8 μm (31.50 μin)
< 1.2 μm (47.25 μin)
Tip shape

straight
reduced
tapered
Temperature range

-200...650 °C (-328...1.202 °F)
Max. process pressure (static)

50 bar (725 psi)
Max. process pressure at 400 °C

depends on process connection

We value your privacy

We use cookies to enhance your browsing experience, collect statistics to optimize site functionality, and deliver tailored advertisements or content.

By selecting "Accept all", you consent to our use of cookies.
For further details please review our cookie policy .

Language:	English
Version:	01/12/2016
File size:	1.3 MB
File name:	BA01469TEN_0116.pdf

Language:	English
Version:	01/11/2002
File size:	320.9 KB
File name:	TI245ten_1102.pdf

Language:	English
Version:	01/11/2002
File size:	320.9 KB
File name:	TI245ten_1102.pdf

Language:	English
Version:	01/12/2016
File size:	1.3 MB
File name:	BA01469TEN_0116.pdf

Language:	English
Version:	14/07/2021
File size:	478.5 KB
File name:	SD02429R09EN_0121.pdf

Language:	German
Version:	17/05/2023
File size:	17.9 MB
File name:	FA00006Tde_2223_online.pdf

Language:	Spanish
Version:	20/04/2018
File size:	5.5 MB
File name:	FA00006Tes_Catalogo Temperatura_1818.pdf

Language:	Italian
Version:	17/02/2020
File size:	30.6 MB
File name:	FA00006TIT_2020.pdf

Language:	Japanese
Version:	17/02/2020
File size:	38.9 MB
File name:	FA00006TJA_2020.pdf

Language:	French
Version:	20/12/2019
File size:	60.9 MB
File name:	FA00006TFR-Mesure de temperature.pdf

Language:	Russian
Version:	26/05/2021
File size:	1.6 MB
File name:	EAEC RU C-IT.AD85.B.00350_21.pdf

	EN
01/12/2016

	EN
01/11/2002

	EN
01/11/2002

	EN
01/12/2016

TW251Protection tube for temperature sensors

The protection tube with built-in compression fitting allows varying types of probes to be applied

Specs at a glance

Max. process pressure (static)

Maximum standard immersion length

Max. immersion length on request

Field of application

Benefits

Fundamental selection

Predecessor

Success stories

Prevent grain dust ignition in bulk tanks & silos

Self-calibrating thermometers in hygienic processes

Medical autoclaves

Automated inline self-calibration at Lonza

Iplom enhances catalyst life, process safety and efficiency

Measuring principle

Characteristic / Application

Head connection

Maximum standard immersion length

Max. immersion length on request

Process connection

Thermowell root diameter

Medium contact material

Wetted part finishing (Ra)

Tip shape

Temperature range

Max. process pressure (static)

Max. process pressure at 400 °C

Back

Thermowells

Technical information TW251

Technical information TW251

Thermowells

Device viewer

Temperaturmesstechnik

Temperature measurement

Catálogo medición temperatura

Misura della temperatura

温度計

Mesure de température

Product family: Accessories: Pipe thermowell

Product family: Accessories: Bar stock thermowell, Accessories: Housing, ACCESSORIES: PIPE THERMOWELL, Accessories: RTD insert, ACCESSORIES: TC INSERT, ACCESSORIES: THERMOWELLS, Accessories: Inserts, PLUGS TC DIRECT CONTACT, Terminal head

Product family: Accessories: Bar stock thermowell, Accessories: Pipe thermowell, Accessories: Thermowells

Product family: Accessories: Bar stock thermowell, Accessories: Pipe thermowell, Accessories: Thermowells

Back

Spare parts kit sealing PTFE d6mm (5 p)

Spare parts kit sealing d3mm PTFE (5 p)

The unit is not repairable

Choose from our suggested options

Individual configuration

We value your privacy

TW251
Protection tube for temperature sensors