What is a Non-Contact Type Temperature Transducer?

Basically in non-contact type the temperature transducer sensor is not in direct contact with the substance. And the working principle behind non contact type temperature transducer is “every object with temperature above absolute zero (0 °K) emits infrared thermal energy”. They measure the temperature by sensing the thermal energy, infrared energy emitted by the object whose temperature is being measured. Non contact type temperature transducer has an optical system to collect the energy emitted by the target, the detector converts this energy into electrical signal. This is the preferred technique for small, moving, inaccessible items. A non-contact temperature gauge is also called a pyrometer. There are three types of pyrometers, radiation pyrometers, thermal imagers, and optical pyrometers.