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Thanks to their special properties, mineral-insulated resistance thermometers are used in chemical plants, power stations, pipelines, in engine construction, on test beds and in all applications where flexibility and problem-free replacement are required. The low-resistance internal copper conductors are embedded in compressed heat-resistant magnesiumoxide inside a flexible thin-walled sheath in stainless steel.


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Thanks to their special properties, mineral-insulated resistance thermometers are used in chemical plants, power stations, pipelines, in engine construction, on test beds and in all applications where flexibility and problem-free replacement are required. The low-resistance internal copper conductors are embedded in compressed heat-resistant magnesiumoxide inside a flexible thin-walled sheath in stainless steel.

The temperature sensor in 2-wire, 3-wire or 4-wire circuit is connected to the internal wires and fitted in the stainless steel protection tube. Protection tube and sheath are welded to- gether. Diameters as small as 1.9mm are available.

The excellent heat transfer between the protection tube and the temperature sensor enables short response times (t0.5 from 0.7sec) and high accuracy. The shock-proof construction ensures a long life. The flexible probe tube permits temperature measurement at points that are difficult to reach. The smallest bending radius is 5 times the external diameter.

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.


Tehcnical Specifications:

  • application-specific fitting length
  • flexible sheath with shock-protected sensor
  • as single or twin resistance thermometer in 2-wire, 3-wire or 4-wire circuit
  • fast response time
  • application-specific fitting length

Specifications:

Terminal head Form J, aluminium die-casting, M 16x1.5; IP54, ambient temperature -40 to +100°C
Caution: reduced ambient temperature when using transmitters,
Data Sheet 70.7030 (95.6530)
Connection cable ends available as: bare wires, with ferrules, receptacles or multipole connector
Connecting cable silicone, ambient temperature -50 to +180°C
PTFE, ambient temperature -190 to +260°C
metal braiding, ambient temperature -50 to +350°C
Process connection thread, stainless steel 1.4571
Protection tube stainless steel 1.4541, 1.9mm, 3mm and 6mm dia.
Measuring insert Pt100 temperature sensor, EN 60 751, Cl. B, 2-wire circuit
Response times in water with 0.4m/sec / in air with 3m/sec
1.9mm dia.: water t0.5 = 0.7sec, t0.9 = 2.1sec / air t0.5 = 7.2sec, t0.9 = 20.5sec
3.0mm dia.: water t0.5 = 1.3sec, t0.9 = 4.0sec / air t0.5 = 13.5sec, t0.9 = 41.0sec
6.0mm dia.: water t0.5 = 5.0sec, t0.9 =11.5sec / air t0.5 = 37.5sec, t0.9 = 117.5sec
Transmitter analog transmitter, output 4 - 20mA, Data Sheet 70.7030 (95.6530)

Tehcnical Specifications:

  • application-specific fitting length
  • flexible sheath with shock-protected sensor
  • as single or twin resistance thermometer in 2-wire, 3-wire or 4-wire circuit
  • fast response time
  • application-specific fitting length

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