There are many types of pyrometers, which are divided into civil and industrial use. There are also many kinds of products. The industry includes thermal resistance, thermocouple, bimetal thermometer, temperature transmitter, digital thermometer and other main products. Common temperatures are: -100 degrees, 200 degrees, 500 degrees, 800 degrees, 1200 degrees, 1600 degrees, 1800 degrees, or even higher, depending on your needs.

According to the difference of the purpose of use, a variety of pyrometers have been designed and manufactured. Its design is based on: the use of the phenomenon of thermal expansion and contraction of solids, liquids and gases under the influence of temperature; under the condition of constant volume, the pressure of gas (or vapor) changes due to the difference of temperature; the role of thermoelectric effect; Changes in temperature; the influence of thermal radiation, etc.
When measuring the surface temperature of luminous objects, such as aluminum and stainless steel, reflections from the surface can affect the reading of an infrared thermometer. Before reading the temperature, you can place a strip on the metal surface. After the temperature is equilibrated, measure the temperature of the strip area.