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Available versions of cable sensors in metal sleeve (MH)

Pressure corrugation

  • Pt100 Cable resistance sensor in metal sleeve
  • Pressure corrugation

For this temperature sensor a Pt100 measuring resistor is normally connected to the power line by soldering (hard / soft soldering). Ideally is a PTFE hose line should be used as connecting line. The solder joint is insulated by a heat shrinking tube made of PTFE, Kynar or Kynarflex. Subsequently, the entire sensor is completed with shrinking tube insulation and installed in a metal sleeve filled with thermal grease. The sensor is closed by 6-point corrugation. An increased sealing of the sensor is achieved by using a Viton shrinking tube directly between bead and lead. The temperature measurement range is between -70°C and 260°C.

Rolling bead

  • Pt100 Cable resistance thermometer in metal sleeve
  • Rolling bead

For the rolling bead a Pt100 measuring resistor is connected by soldering to a round Silicone-insulated cable and later on the solder joint is insulated by PTFE, Kynar or Kynarflex-shrinking tube. The isolated sensor is furnished into the metal sleeve with a thermal compound and closed by rolling bead. The rolling bead - in contrary to the pressed corrugation - has the advantage that a continuous closure of the resistor takes place. Thus fabricated, the temperature sensors are strain-relieved and therefore better protected against external environmental influences such as the ingress of condensation. The operating temperature is between -55°C and +180°C.

Casting compound

  • Pt100 Cable resistance thermometer in metal sleeve
  • Casting compound

Using a casting process a Pt100 resistance sensor is connected by soldering to a power lead, consisting of two or more individual strands, afterwards the solder joint is isolated. After repeated isolation of the entire sensor the measuring resistor is built into the sleeve head with a sealing compound. Depending on the sensor type and application, different casting compounds are used. By default, thermoset plastics (epoxy resins), elastomers (silicones) or quartz powder are used. The maximum service temperature is up to 200°C depending on casting compound.

 

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