Pt100 Model M medium-temperature
precision thermometer
(-100 °C to 250 °C)

815,00 1.860,00 

Manufacturer: Klasmeier / eXacal
Model: Pt100M


Precision resistance thermometer with thin metal sheath and extra small ceramic temperature detector. This eXacal thermometer is designed to measure radial and vertical temperature profiles.

  • Temperature range: -100 °C to 250 °C
  • small measurement uncertainties:
    between 5 mK and 10 mK
  • fast measuring times due to thin metal sheath
  • Good heat connection due to small temperature sensor
  • optimal for the measurement of vertical temperature gradients

This eXacal thermometer was developed to measure vertical and radial temperature profiles in calibration equipment as part of the measurement uncertainty. This is required in several guidelines such as DKD-R 5-4 “Calibration of block calibrators”, DKD-R 5-3 “Calibration of thermocouples” or DKD-R 5-1 “Calibration of resistance thermometers”. In addition, the thermometer is suitable for measuring and setting heating zones on calibration furnaces. Of course, the thermometer can also be used in general to measure temperatures accurately.



eXacal thermometers are calibrated in our own DAkkS calibration laboratory. The DAkkS accreditation ensures that all calibrations are traceable to national and international standards.

The calibration of the eXacal resistance thermometers is performed at ITS-90 fixed points. It is also possible to perform calibrations according to the comparison method in calibration baths and calibration furnaces. The measurement uncertainty is calculated from many components. The largest components are reproducibility, ITS-90 characteristic, self-heating and hysteresis.

Measurement uncertainty

  • Small measurement uncertainties with DAkkS calibration certificate
  • Temperature fixed points from mercury triple point -38,8344 °C to tin freezing point 231,928 °C

Temperature range Method Measurement uncertainty
-38,8344 °C – 0,01 °C Mercury to water 5 mK
0,01 °C – 29,7646 °C Water to gallium 6 mK
0,01 °C – 156,5985 °C Water to indium 9 mK
0,01 °C – 231,928 °C Water to zinn 10 mK

The specified measurement uncertainties correspond to k=2, include an ITS-90 characteristic curve and are given for the respective range.


Questions about the thermometer?


    Additional information

    Select calibration

    inclusive DAkkS Calibration, without DAkkS Calibration

    Technical Data

    Model Pt100M
    Temperature range -100 °C to 250 °C
    Nominal resistance Pt100 (100 Ohm)
    Connection Four-wire
    Connection cable Temperature resistant – EMF low strands
    from own production
    Connection Bananaplugs
    Sheath material Metal
    Thermometerwire Platinum 
    Handle ∅ 20 mm x 100 mm
    Diameter 4 mm
    Length 400 mm
    Connection cable 2 m
     measurement resistor / temperature sensor
    Length 6 mm
    Recommended measuring current 1 mA
    Self-heating 30 mK @ 1 mA
    at 29,7646 °C (Gallium melting point)