Thermometer in cryogenic design - Innovative design for low-temperature measurements
Applications
- Extremely-low temperature measurements
- Applications with liquid hydrogen (LH2)
- Cryogenic tanks
- Cryogenic pipelines
- Hydrogen liquefaction plants
Special features
- Innovative design with high accuracy
- Usable with all relevant thermometers
- Approved for applications in hazardous areas
Description
Due to the global use of hydrogen, extremely low-temperature measurement during transport and storage is gaining an ever-greater relevance. With the cryo design, WIKA provides a suitable option for all relevant temperature measuring instruments for this demanding application.
In laboratory trials, resistance thermometers (Pt1000) and thermocouples (type E) were tested for their suitability in cryogenic applications. The special design of the cryogenic thermometer features a high accuracy of ±3 Kelvin at -253 °C [-423 °F] as well as high reproducibility.
The test data from laboratory investigations served as the basis for calculating new polynomials for Pt1000 resistance thermometers in the range of -258 ... -200 °C [-432 ... -328 °F] which are used in the configuration of WIKA transmitters.
Why has there been, for some time, a separation between the accuracy classes for "wire-wound resistance" and "film resistance" Pt100 measuring resistors?
In the past, no distinction had been made between the two basic types of measuring resistor and their temperature limits. Practice, however, showed that film resistors (thin-film/chipset resistors) have a (not insignificant) deviation form the char ...
moreHow long is the WIKA Build ID valid?
The WIKA Build ID is valid for at least three months.
What can I do if the medium temperature with filled-gauges is over 100 °C [212 °F]?
You can use a pressure gauge syphon, a diaphragm seal or a capillary line as an additional cooling element in order to lower the medium temperature.
