Digital Temperature Gauge With Measuring Range 0-600 Degree is a display type RTD or thermocouple sensor which is designed for indicating the temperature reading with a digital display. These gauges feature a bright LED or LCD display and they are ideal for replacement of bi-metal, liquid bulb, and gas thermometers. Temperature gauges measure the thermal state of a homogeneous substance. The measuring system must be brought as closely together as possible with the body to be measured.