Current research projects

Image Thermostatic Expansion Valves
Image Non- invasive flow measurements
Image Low noise and non metallic liquid-helium cryostat
Image Solar Cooling
Image Refrigerants, lubricants and mixtures
Image Helium extraction from natural gas
Image Service offer for Leak Detection and Tightness Test
Image Software for technical building equipment
Image Corrosion inhibitor for ammonia absorption systems
Image Laseroptical measurement
Image Testzentrum PLWP at ILK Dresden
Image Calibration leak for the water bath leak test
Image Micro heat exchangers in refrigeration
Image Development of test methods and test rigs for stationary integrated refrigeration units
Image Reduction of primary noise sources of fans
Image Calibration of Low Temperature Sensors

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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 - Research and Development

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Test according DIN EN 14511 and 14825