• Gas expansion thermometer

Gas expansion thermometer

with clip-on bulb, Type series FN....


  • Case, measuring system and clip-on bulb of stainless steel
  • Simple mounting without thermowell
  • Accuracy class 1 per EN 13190 when insulated in the plant
  • Micro adjustment pointer for indication correction
  • Design: 
    - bulb fixed welded
    - indicating unit positioning by rotating the bulb
    - with capillary (indicating unit independent of measuring point)
  • Case with liquid filling
  • Calibration certificate per DIN EN 10204



These thermometers are suitable for use outdoors and in aggressive environments. Gas expansion thermometers with clip-on bulb offer some benefits to the user: no change in pipeline cross-section, the line thus remains piggable and retrofitting; can be carried out without interfering with the process; simple mounting.
If the exact orientation of the indication is not known before mounting, we recommend using the positionable version. With this version the case may be re-positioned once by ± 180° with respect to the pipeline. Further information on mounting these devices and measuring errors is to be found in the operating instructions BTA-017.

Application area

● Chemical and petrochemical industry
● Machinery construction
● General process technology

Type series