Current research projects

Image Low noise and non metallic liquid-helium cryostat
Image Investigation of coolants
Image Non- invasive flow measurements
Image Tensile and compression testing
Image Testzentrum PLWP at ILK Dresden
Image Influenced melting point of water by magnetic field
Image Heat2Power
Image ZeroHeatPump
Image Cold meter
Image Lifetime prediction of hermetic compressor systems
Image Reduction of primary noise sources of fans
Image Electrochemical decontamination of electrically conducting surfaces „EDeKo II“
Image Tribological investigations of oil-refrigerant-material-systems
Image Innovative small helium liquefier
Image Brine (water)-water heat pump
Image Humidifier System for High-Purity Gases

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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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Reduction of primary noise sources of fans

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

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Software for technical building equipment

Design cooling load and energetic annual simulation (VDI 2078, VDI 6007, VDI 6020)

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Measurements on ceiling mounted cooling systems

Comparative performance measurement

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Micro fluidic expansion valve

for increasing of the efficiency of small and compact cooling units

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Solar Cooling

Solar Cooling with Photovoltaic