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Infrared thermometers work very well when measuring the temperature of hot oil. For deep frying it's not a big deal, as standard probe thermometers work fine. But for shallow frying or sauteeing, the IR thermometer does an excellent job at providing the temperature of the oil.
How to Calibrate an Infrared Thermometer. Infrared thermometers can be calibrated for accuracy just like other thermometers. In ETI's Calibration Laboratory technicians use industrial black bodies to calibrate infrared thermometers with certification traceable to National Standards. UKAS accredited certification of IR Thermometers may be obtained from ETI on application and quotation.