Current research projects

Image Industry 4.0 membrane heat and mass exchanger (i-MWÜ4.0)
Image Mass Spectrometer
Image Pulse-Tube-Refrigerator with sealed compressor
Image Testing of mobile leak detectors according to DIN EN 14624
Image Thermostatic Expansion Valves
Image 3D - Air flow sensor
Image Electrical components in refrigeration circuits
Image Optimizing HVAC operation with machine learning
Image Software modules
Image Software for test rigs
Image Lifetime prediction of hermetic compressor systems
Image High temperature heat pump
Image Low Temperature Measuring Service
Image Measurement of insulated packaging
Image Calibration of Low Temperature Sensors
Image Investigation according to DIN EN ISO 14903

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Calibration of Low Temperature Sensors

Industry and R&D

Dr. rer. nat. Matthias Schneider

+49-351-4081-5126

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. There are continuous extensions for different sensor types.

Parameter

IndicatorMinimalMaximal
Measuring range1.5 K350 K
Measuring accuracy5 mK (1.5 ... 4.2 K)50 mK (80 ... 350 K)
Sample dimensioncommon sensor packages
Sample preparationnot necessary

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Further Projects - Measurements and Tests

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Mass Spectrometer

Determining the composition of gas mixtures in the high or ultra-high vacuum range

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Tensile and compression testing

Determination of yield strength, tensile strength and elongation at break

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Investigation of material-dependent parameters

Investigation of the permeation behavior

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Low temperature – test facilities

thermal cycling tests at very low temperatures