Electrical thermometers in CryoTemp design
CryoTemp - Innovative design for low-temperature measurements
Applications
- Petrochemical industry, basic materials, power generation
- Cryogenic tanks
- Cryogenic pipelines
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. For this demanding application, with the CryoTemp design, WIKA provides the most suitable option for all relevant temperature measuring instruments.
In laboratory trials, resistance thermometers (Pt1000) and thermocouples (type E) were tested for their suitability in cryogenic applications. The special design of the CryoTemp features a high accuracy of +/− 3 Kelvin at minus 253 °C.
The test data from the laboratory investigations served as the basis for calculating new polynomials in the range of −258 °C to −200 °C which are used in the configuration of WIKA transmitters.
For Pt100 sensors, what is the reason for the historic separation of accuracy classes for wire-wound resistance and film resistance?
In the past, no distinction was 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 significant deviation from the characteristic. T ...
more
