Resistance (RTD) cable sensor for measurement of soil temperature

  • To be inserted or buried in the ground
  • Stainless steel sheath and tapered tip, IP68 rated
  • -40…+115°C / +239°F

OPTITEMP TRA-W80 – Standard version

Resistance (RTD) cable sensor OPTITEMP TRA-W80 – Standard version

The OPTITEMP TRA-W80 is a cable sensor (RTD) for soil temperature measurement or similar applications. The heavy duty sensor is designed to withstand high pressures and harsh environments. The robust, oil-tight cable can handle a maximum tensile load of 900N. Its cable can be pulled so as to move the sensor even if buried. The ground temperature sensor features a Pt100 or Pt1000 measuring element that is placed in the tip of the tube filled with heat transfer compound for fast response times. The measuring range of the sensor is -50…+200°C / -58…+390°F. The OPTITEMP TRA-W80 comes with an oil-tight and UV proof Hytrel® insulated connecting cable as standard.

Product highlights

  • Temperature measurement in harsh environments and subsoil applications (e.g. underground pipelines)
  • Heavy duty design: oil-tight, vibration and UV proof, IP68
  • Sheath material: Stainless steel (1.4404 / 316L)
  • Tolerance class A according to IEC 60751 as standard
  • Available with Hytrel® insulated connecting cable
  • Standard or customised lengths
  • Ingress protection: IP68

Typical applications

  • Monitoring of soil temperature to determine the frost depth for save pipeline operation
  • Suitable for heavy duty applications in almost all industries

Product details

Alternative product categoriesGround temperature sensor, Potentiometer, Pt100 element, Pt100 probe, Resistance temperature detector, Resistance thermometer, RTD, Soil temperature probe, Soil temperature sensor

Technical data

Measurement principlesResistance (RTD)
Measured mediaGases, Liquids, Solids
Measuring pointSoil
Measuring insert typeNon-replaceable RTD
Measuring insert replaceableNo
RTD element type1 x Pt100, 2 x Pt100
RTD configuration2-wire, 4-wire
Temperature sensor connection type optionFlying wires, Hyrtel® insulated connecting cable
Sheath diametersØ24 mm / 0.94"
Process temperature-40…115°C/
Sensor mountingPlug-in


Process connections