Current research projects

Image Hybrid- Fluid for CO2-Sublimation Cycle
Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
Image Test rigs for refrigeration and heat pump technology
Image Certification of efficient air conditioning and ventilation systems through the new "indoor air quality seal" for non-residential buildings
Image Industry 4.0 membrane heat and mass exchanger (i-MWÜ4.0)
Image Development of test methods and test rigs for stationary integrated refrigeration units
Image Non- invasive flow measurements
Image Performance tests of refrigerant compressors
Image Testing of mobile leak detectors according to DIN EN 14624
Image Influenced melting point of water by magnetic field
Image Low temperature – test facilities
Image Cold meter
Image Air-flow test rig for fan characteristic measurement
Image Measurements on ceiling mounted cooling systems
Image Brine (water)-water heat pump
Image Ionocaloric cooling

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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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Characterisation of Superconductors in Hydrogen Atmosphere

Are superconductors really compatible with hydrogen?

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Corrosion inhibitor for ammonia absorption systems

An alternative to chromium(VI) compounds

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Development of a Cryogenic Magnetic Air Separation Unit

Oxygen Enrichment by Applied Cryogenic Magnetohydrodynamics

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Brine (water)-water heat pump

Test according DIN EN 14511 and 14825