The infrared thermometer is a laser thermometer that uses blackbody radiation to measure temperature. An infrared thermometer design was patented in the 1980s by several employees of Intelligent Medical Systems, Inc. A compact infrared thermometer was then patented in 2002 by ZyTemp.

A laser thermometer is also often referred to as an infrared thermometer. An infrared thermometer detects the temperature of and object based on the amount of infrared radiation that is given off by said object by focusing the radiation.

You cannot use a non contact infrared IR thermometer on a grill.

An infrared thermometer is a thermometer which infers temperature from a portion of the thermal radiation sometimes called blackbody radiation emitted by the object being measured. They are sometimes called laser thermometers if a laser is used to help aim the thermometer, or non-contact thermometers to describe the device's ability to measure temperature from a distance. By knowing the amount of infrared energy emitted by the object and its emissivity, the object's temperature can often be determined. Infrared thermometers are a subset of devices known as "thermal radiation thermometers".

IR thermometer is based on infrared technology . It is available at the link below: