temperature measurementinstrumentAccording to the temperature measurement method, it can be divided into two categories: contact type and non-contact type. Generally speaking, contact temperature measuring instruments are relatively simple, reliable, and have high measurement accuracy;

However, due to the need for sufficient thermal exchange between the temperature measuring element and the measured medium, it takes some time to reach thermal equilibrium, so there is a delay in temperature measurement. At the same time, due to the limitations of high-temperature resistant materials, it cannot be applied to very high temperature measurements.

Non contact instrument temperature measurement is based on the principle of thermal radiation to measure temperature. The temperature measuring element does not need to be in contact with the measured medium, has a wide temperature measurement range, is not limited by the upper limit of temperature measurement, and does not damage the temperature field of the measured object. The reaction speed is generally fast;

However, due to external factors such as the emissivity of the object, measurement distance, smoke and moisture, the measurement error is relatively large.