Current research projects

Image Overall System Optimization of Refrigeration Plant Systems for Energy Transition and Climate Protection
Image Certification of efficient air conditioning and ventilation systems through the new "indoor air quality seal" for non-residential buildings
Image Tribological investigations of oil-refrigerant-material-systems
Image In-Situ-Swelling Behaviour of Polymer Materials in Flammable Fluids
Image Modular storage system for solar cooling
Image Helium extraction from natural gas
Image Refrigerants, lubricants and mixtures
Image Non- invasive flow measurements
Image Filter Tests
Image State of system and failure analyses
Image Corrosion inhibitor for ammonia absorption systems
Image Energy efficiency consulting - cogeneration systems
Image Panel with indirect evaporative cooling via membrane
Image Cryogenic liquid piston pumps for cold liquefied gases like LIN, LOX, LHe, LH2, LNG, LAr
Image Calibration leak for the water bath leak test
Image High Capacity Pulse Tube Cooler

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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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