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Screw-in resistance thermometers are preferred for measuring temperatures in liquids and gases. An important selection criterion is their reliable sealing against both negative and positive pressures. Applications include HVAC and refrigeration, as well as heating installations, ovens, furnaces and plant engineering.


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Screw-in resistance thermometers are preferred for measuring temperatures in liquids and gases. An important selection criterion is their reliable sealing against both negative and positive pressures. Applications include HVAC and refrigeration, as well as heating installations, ovens, furnaces and plant engineering.

The terminal head is suitable for temperatures up to +100°C. Terminal heads Form BUZ, BUZH and BBK are available in addition to the standard Form B.

The measuring insert is normally fitted with a Pt100 temperature sensor to EN 60 751, Class B in 2-wire circuit. Versions with Pt500 or Pt1000 are also available. 3-wire or 4-wire circuit connections can be provided. Optionally, it is possible to integrate a transmitter into the terminal head.


Technical Specifications:

  • for temperatures from -50 to +600°C
  • with replaceable measuring insert
  • as single or twin resistance thermometer
  • terminal head Form B, BUZ, BUZH, BBK
  • with transmitter option

Specifications:

Terminal head Form B DIN 43 729, aluminium die-casting, M 20x1.5; IP54,
ambient temperature -40 to +100°C
Form BUZ, aluminium die-casting, M 20x1.5; IP65, ambient temperature -40 to +100°C
Form BUZH, aluminium die-casting, M 20x1.5; IP65, ambient temperature -40 to +100°C
Form BBK, plastic, M 20x1.5; IP54, ambient temperature -30 to +130°C
Caution: reduced ambient temperature when using transmitters,
Data Sheets 70.7030 and 70.7010
Ekstension tube stainless steel 1.4571, length 130mm (150mm for Type 902020/50.../51...)
Process connection thread, stainless steel 1.4571
pocket, stainless steel 1.4571 or steel 1.7335
Protection tube replaceable, Pt100 temperature sensor EN 60 751, Cl. B, 2-wire circuit (not replaceable on Type 902020/25)
Measuring insert Replaceable, Pt 100-temperature sensor DIN EN 60 751, kl. B, 2-wire circuit not replaceable on type 902020/25)
Response times t0.9 approx. 50sec, in water 0.2 m/sec, 9mm dia.
Transmitter analog transmitter, output 4 - 20mA, Data Sheet 70.7030
analog transmitter, output 0 - 10V, Data Sheet 70.7030
programmable transmitter, output 4 - 20mA/20 - 4mA, Data Sheet 70.7010
Accessories pocket, Data Sheet 90.9721

Technical Specifications:

  • for temperatures from -50 to +600°C
  • with replaceable measuring insert
  • as single or twin resistance thermometer
  • terminal head Form B, BUZ, BUZH, BBK
  • with transmitter option

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