Optical pyrometers are simple in structure, lightweight and easy to use, and are often used in metal smelting, glass melting, heat treatment and other processes, and are non-contact temperature measurement. The disadvantage is that the measurement is compared by the human eye, which is easy to introduce subjective errors and the price is high.

Radiation pyrometers are mainly used in ultra-high temperature applications that cannot be measured by thermocouples. The advantages are high temperature measurement; fast response; non-contact temperature measurement; moderate price. The disadvantage is the nonlinear scale; the emissivity of the measured object and the absorption rate of the intermediate medium of the radiation channel will affect the measurement; the structure is complex.
Infrared thermometer (portable) is characterized by non-contact temperature measurement; wide temperature measurement range (600~1800℃/900~2500℃); high precision; stable performance; fast response time (O.7s); working distance greater than 0.5m, One of the necessary inspection tools for on-site inspection, the advantage is that it is easy to carry.
In today's highly integrated industrial automation, temperature measurement is no longer out of reach. If it is coupled with wireless transmission, whether it is a tower or deep sea, it is not a problem, and the stability is good, which greatly reduces maintenance and installation costs. Measurement is the process The eyes of control can predict the small changes of parameters in advance, and achieve the purpose of fine control. Through the above, the choice of temperature measurement is no longer confused, there is no perfect measurement method, only the most suitable measurement method.