It does not need to be calibrated, and the operating range and accuracy are higher than the only world analogue
At South Ural State University (SUSU) they created an «eternal» a thermometer, which, according to its creators, measures temperature several times more accurately than existing analogues in the world. In addition, the device does not require regular maintenance. As SUSU scientists said, all thermometers “age” over time: their readings begin to deviate from the standard with an error of up to 5-15 °C. Therefore, the sensor from such devices must be regularly removed and calibrated: for some equipment this needs to be done once every six months, and sometimes after each technological process.
But it is almost impossible to carry out such maintenance of a temperature sensor on a space satellite or nuclear power plant, as SUSU specialists note. Therefore, the university created a sensor that can independently verify itself in each heating-cooling cycle. Such a thermometer includes a main temperature meter and a standard against which the sensor readings are compared, and all this is collected in a single capsule. To create the device, ferrites were used — a chemically inert, heat-stable material that is not affected even by high background radiation. It is the ferrite element that acts as a temperature standard in the development of Russian scientists.
The device was completely designed and manufactured at SUSU, including all electronics, the prototype is already ready and is being tested. According to SUSU, there is only one industrial analogue in the world; it is produced in Germany, but the Russian development surpasses it in all characteristics. For example, a foreign device operates at temperatures from 0 to 200 °C, and a domestic one — from 0 to 800 °C (this range is common in energy and metallurgy). The accuracy of the sensor is plus or minus 1 °C, and not a single thermometer in the world can provide long-term temperature measurement with such accuracy as experts claim. It is expected that the device will be fully developed and ready for industrial production within a year.