The Power Probe No Contact Infrared Thermometer, No. IRGUN500, is designed to detect the infrared rays that an object emits. The instrument focuses the infrared energy of the object through the lens and onto a sensor. As a result, the instrument changes the surface temperature into an electrical signal, and a microcomputer calculates and displays the measured temperature on the LCD. Features a spectral response between 8-14 μm, degrees selection, one second response time, and a relative humidity between 10 and 90 percent.