Pt100 Model I Industrial reference thermometer

Precise reference thermometer for measuring exact temperatures or as industrial temperature standard e.g. for temperature dry block calibrators.

  • slim design
    The small handle allows the use in cramped conditions such as temperature dry block calibrators
  • 1/10 DIN Pt 100
    Use of highly stable and annealed detectors.


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 eXacal resistance thermometers is carried out at ITS-90 fixed points. It is also possible to carry out calibrations according to the comparison method in liquid baths and calibration furnaces. The measurement uncertainty is calculated from many components. The largest contributions are reproducibility, ITS-90 function, self-heating and hysteresis.

Measurement Uncertainties

Technical data

Model Pt100I
Temperature range -50 °C to 250 °C
Nominal resistance Pt100 (100 Ohm)
typical annual drift 2,5 mk
Connection type Four-wire
Connecting cable temperature resistance – very low EMF stranded wires from own production
Connection banana plug
Sheath material Metal
Thermometer wire silver
Handle ∅ 12 mm x 40 mm
diameter 4 mm
Length 200 mm
Connection cable 1 m
R0 100 Ohm ± 0,05 Ohm
Alpha 0,003850 ± 0,000005
Standard IEC 60751:2008
tolerance 1/10 DIN
length 25 mm
recommended measuring current 1 mA
Self-heating 4 mK
DAkkS Calibration
Comparison calibration 10 mK to 40 mK


Questions about the thermometer?