A two-color pyrometer an INSTRUMENT that measures the energy in two different wavelength bands (colors) in order to determine temperature. A two-color pyrometer is often CALLED a ratio thermometer because the temperature is MEASURED by calculating the ratio between the two detector signals. The two color TECHNIQUE used in this instrument has been shown to be effective for correcting errors due to partial blockage of the target caused by smoke and dust PARTICLES, a dirty lens, or the target not filling the resolved spot size.

A two-color pyrometer an instrument that measures the energy in two different wavelength bands (colors) in order to determine temperature. A two-color pyrometer is often called a ratio thermometer because the temperature is measured by calculating the ratio between the two detector signals. The two color technique used in this instrument has been shown to be effective for correcting errors due to partial blockage of the target caused by smoke and dust particles, a dirty lens, or the target not filling the resolved spot size.