Current research projects

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Image In-Situ-Swelling Behaviour of Polymer Materials in Flammable Fluids
Image Swirl-free on the move...
Image Refrigerants, lubricants and mixtures
Image Thermal engines
Image Multifunctional electronic modules for cryogenic applications
Image Breakthrough Sensor for Adsorption Filters (BelA)
Image High Capacity Pulse Tube Cooler
Image All-in-one device for freeze-drying and production of biomaterial
Image Test method for high - temperature heat pump - oils
Image Industry 4.0 membrane heat and mass exchanger (i-MWÜ4.0)
Image IO-Scan - Integral measuring optical scanning method
Image Brine (water)-water heat pump
Image Test rigs for refrigeration and heat pump technology
Image Verification of storage suitability of cryo tubes
Image Innovative Parahydrogen Generator Based on Magnets

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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

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Influenced melting point of water by magnetic field

Controlled sub-cooling of products in freezing processes

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Investigation of materials

Investigations regarding the compatibility of materials with refrigerants, oils and heat transfer fluids

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Non- invasive flow measurements

PDPA - flow fields and particle sizes