The colorimetric pyrometer is a non-contact two-color infrared temperature measuring system with focusing, lens aiming and parallax free optical system. They are also energy transmitters for measuring infrared energy emitted by objects with high accuracy and repeatability, and then converting the energy into measurable electrical signals. The temperature is measured as follows:
        Monochrome mode - standard temperature measurement. Monochrome mode is most suitable for measuring the target temperature under the following conditions: there is no solid or gaseous aiming obstruction. The monochrome mode is also suitable for the following situations: the target completely fills the measuring light spot, and the temperature of the background or foreground is higher than the target temperature.
        Two color mode - the temperature is determined according to the ratio of two independent and overlapping infrared bands. The two-color mode is most suitable for measuring targets under the following conditions: when the target is partially blocked (intermittently or permanently) by other objects, openings, screens or observation windows with reduced energy and dust, smoke, or water vapor in the air. The two-color mode is also applicable to the case where the target does not fill the entire measuring light spot and the background temperature is lower than the target temperature.