Welded temperature sensor

Welded temperature sensor

T-D / W-D according to DIN 43772 form 4 (datasheet 4)


  • temperature range - 200...+1200 °C
  • Pt100 or thermocouple (TC)
  • with welded thermowell
  • thermowell material according to the application
  • Pt100, accuracy class A, as a standard, more accurate on request
  • TC, class 1 as a standard
  • replaceable inner element, MI-construction
  • tailored solutions according to specific needs
  • ATEX-versions, Ex i and Ex d available.

Typical Applications

  • Energy and power plant technology
  • Process industry
  • Chemical industry
  • Machinery, plant and vessel construction.


Dimensions, data sheet 4

Technical data

Thermowell Material

K = AISI 316L max. temp. +550 °C
L = 13CrMo44/1.7335 max. temp. +550 °C
M = 10CrMo910/1.7380 max. temp. +580 °C
O = 16Mo3/1.5415 max. temp. +480 °C
other materials available on request

Thermowell type
according to DIN 43772 Form 4

D1/D2, D4/D5, D3/D6, others on request
Thermowell dimensions: please see page Welded wells

Tolerances Pt100 (EN-60751)

A, tolerance +/- 0,15 + 0,002 x t, operating temperature -100...+450 °C
B, tolerance +/- 0,3 + 0,005 x t, operating temperature -196...+600 °C
B 1/3 DIN, tolerance +/- 1/3 x (0,3 + 0,005 x t), operating temperature -196...+600 °C
B 1/10 DIN, tolerance +/- 1/10 x (0,3 + 0,005 x t), operating temperature -196...+600 °C

Tolerances TC (EN-60584-2)

Type J, tolerance class 1 = -40...375 °C +/- 1,5 °C, 375...750 °C +/- 0,004 x t
Type K and N, tolerance class 1 = -40...375 °C +/- 1,5 °C, 375...1000 °C +/- 0,004 x t

Temperature range Pt100

-200...+550 °C

Temperature range TC

-200...+1200 °C depending on thermoelement type and thermowell material



Quality certificate

ISO 9001:2008 issued by DNV


IP65, higher IP-class on request

Welded well + Pt100/thermocouple sensing element - example code:


Code key, data sheet 4

Click to open the code key image


Pt100 wire colors
Pt100 wire colors
TC type J/K/N wire colors
TC type J/K/N wire colors

Installation example

Image below: Thermowell welded on a welded root sleeve. Please see more information on page: Welded root sleeves »

Installation, data sheet 4
Connection head options

Connection heads

Version D/H with quick release clip and blue epoxy lack finish is our standard, but for certain applications other types are better suited.

Connection heads are also available as accessories or spare parts, please see more on page Connection heads »

Download Format
Welded temperature sensor .pdf


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