I. Why use a non-contact infrared thermometer? A non-contact infrared thermometer uses infrared technology to quickly and conveniently measure the surface temperature of an object. It can rapidly obtain temperature readings without physically touching the object. Simply aim, pull the trigger, and read the temperature data on the LCD display. Infrared thermometers are lightweight, compact, and easy to use, and they can reliably measure hot, dangerous, or hard-to-reach objects without contaminating or damaging them. An infrared thermometer can take several readings per second, while a contact thermometer may require several minutes to take a reading each second.