Two-color infrared thermometer is a kind of infrared thermometer. That is to measure the infrared radiation brightness emitted by an object in two different spectral ranges and infer the temperature of the object from the ratio of the two radiation brightness, which is called a two-color thermometer. In fact, the two-color thermometer does not have the meaning of brightness and color. The meaning of "color" here should be infrared wavelength or spectrum, that is, "dual infrared spectrum thermometer"

Two-color infrared thermometers have unparalleled advantages over monochromatic infrared thermometers:
1. The influence of the emissivity of the measured target on the temperature measurement results can be basically eliminated.
2. The measured target is small and not full of the field of view, and the presence of smoke and dust on the measurement route will not have a significant impact on the measurement results.
3. The working temperature of the two-color thermometer is mainly in the middle and high temperature areas.
4. High precision, fast response speed and high distance coefficient.