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.
What do the Zones in explosion protection mean?
Gases:
- Zone 0 (Category 1): permanent or long-term danger of explosions
- Zone 1 (Category 2): hazardous atmosphere occasionally exists
- Zone 2 (Category 3): explosive atmosphere exists only rarely, and then only for a short time
Dusts:
- Zones 20, 21, 22 wi ...
Can electrical thermometers be calibrated?
It is not possible to calibrate resistance thermometers (e.g. measuring inserts).
Since electrical thermometers are normally connected to a measuring instrument or evaluation unit, it is only possible to calibrate the entire measuring chain.
Measurin ...
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Why does one have filled pressure gauges?
The filling fluid serves as damping for the moving parts within the case. As a result, damage caused by vibration and increased wear on the moving parts can be prevented.
You can find further information in the following video
