Brightness Thermometer
Temperatures are determined by adjusting a rheostat on the instrument that changes the lampís intensity. Ý Using the inherent ability of the human eye of the operator and the unknown intensity of light radiated from a hot target, a color blend is made between the apex of the pyrometer's calibrated lamp and the target. The current value to the lamp then is output via analog or digital signal to a temperature display.ÝÝ Temperature ranges can be measured between approximately 1,300 to 5,800ƒF (700 to 3,200ƒC).