Infrared thermometers are ideal for taking surface temperature measurements from a distance. They provide relatively accurate temperatures without ever having to touch the object you're measuring.
This is can be useful when it's impractical to insert a probe into the item being measured, or if the surface is just out of reach and a surface probe will not do the job. You might use an infrared thermometer to measure objects that are:
Fragile (computer circuitry)
Liable to contamination (foods, saline solution)
Infrared thermometers are great for checking surface temperature, however they are not a good choice for measuring the internal temperature of an object.
Infrared thermometers are very fast, typically giving a reading in a fraction of a second, or the time it takes for the thermometer's processor to perform its calculations. Their speed and relative ease of use have made infrared thermometers invaluable public safety tools in the food service industry, manufacturing, HVAC, asphalt & concrete, labs and countless other industrial applications