Current research projects

Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
Image Pulse-Tube-Refrigerator with sealed compressor
Image Verification of storage suitability of cryo tubes
Image Low Temperature Tribology
Image Air-flow test rig for fan characteristic measurement
Image Investigation of material-dependent parameters
Image Helium extraction from natural gas
Image Reduction of primary noise sources of fans
Image Investigation according to DIN EN ISO 14903
Image Investigation of materials
Image Innovative Manufacturing Technologies for Cryosorption Systems
Image Energy efficiency consulting - cogeneration systems
Image Influenced melting point of water by magnetic field
Image Software for technical building equipment
Image Thermal engines
Image In-Situ-Swelling Behaviour of Polymer Materials in Flammable Fluids

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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

Image

Innovative small helium liquefier

Liquefaction rates from 10 to 15 l/h

Image

Filter Tests

INDUSTRIAL AND LABORATORY PRECIPITATORS

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Low Temperature Tribology

Tribological studies at cryogenic temperatures

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Refrigerants, lubricants and mixtures

Determination of working fluid properties

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Reduction of primary noise sources of fans

...using numerical and experimental methods with contra-rotating axial fan