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Calibration of Low Temperature Sensors
Industry and R&D
Dr. rer. nat. Matthias Schneider
According to the comparative measurement method
Accurate and reliable measurements are the requirements for high-quality research and development or industrial production. Using the comparative measurement method the following sensors can be calibrated:
- Resistance Temperature Detectors (RTD) with positive temperature coefficient (like Platinum or Rhodium-Iron RTDs)
- RTD with negative temperature coefficient (like Germanium or Cernox™ RTDs)
- Diode and thermocouples.
With an automatic measuring station several temperatures according to a sample point table will be adjusted. The calibration is carried out with secondary thermometers that are calibrated by an authority. Furthermore a fix point check with LHe or LN2 will be performed. In addition, a calbriated Cernox sensor is available for measurements in the low temperature range. The measuring facility allows the calibration of about 30 sensors at once.
|Measuring range||1.5 K||350 K|
|Measuring accuracy||5 mK (1.5 ... 4.2 K)||50 mK (80 ... 350 K)|
|Sample dimension||common sensor packages|
|Sample preparation||not necessary|