Temperature difference thermocouple

Temperature difference thermocouples of precious metal (type R thermocouple and type S thermocouple) for the determination of vertical temperature gradients.

  • Temperature difference measurement up to 1200°C
  • Determination of vertical temperature gradients
  • same high quality thermal material as for normal thermocouples


The thermocouple for temperature difference measurement is a practical helper in daily laboratory work. The thermometer facilitates the work at the:

  • Determination of vertical temperature gradients
    Vertical temperature gradients must be determined as part of the measurement uncertainty of a calibration (e.g. according to the german DKD-R 5-4 “Calibration of dry-well calibrators”, DKD-R 5-3 “Calibration of thermocouples” or DKD-R 5-1 “Calibration of resistance thermometers”).
  • Optimization of calibration furnaces
    When optimizing heating zones on calibration furnaces, such as a 3-zone high temperature calibration furnace, precise temperature differences must be determined.

It consists of two Type R or Type S thermocouples connected in opposition to each other, which are made of the same high-quality thermocouple material as our standard thermocouples. The interconnection leads to a temperature difference measurement.

Schematic diagram: two thermocouples connected against each other

The thermometer has a 500 mm long measuring point, so that the absolute deviation can be determined at the silver fixed point. In order to be able to use the thermocouple for temperature difference measurement even with deviating immersion depths, an additional inhomogeneity scan is carried out.

Technical data

Model Nr. KK-155
Connection temperature resistant – very low EMF stranded wires from own production
 Type Type R or Type S
Temperature range 0 °C to 1200 °C
  • Type R or Type S
  • maximum purity available
  • thermally annealed
Measuring point
  • made of gastight high-purity ceramic
Handle maximum continuous temperature 100 °C
Protection tube Ø 7 mm x 500 mm
Handle Ø 20 mm x 95 mm
Length of thermowire 2 m
Cold junction Ø 6 mm x 280 mm (stainless steel) with two meters of connecting cable made of low-EMF copper
Length of connecting cable 2 m very low EMF copper
Carrying case Included (high-quality wooden case optional)


Questions about the thermometer?