Matching Pairs ThermometersOnline version Match the correct thermometer to its use by londyn victoria 1 Infrared (Laser) Thermometer 2 Thermocouples and Thermistors 3 Penetration Probe 4 Air Probe 5 Bimetallic Stemmed Thermometer 6 Surface Probe 7 Immersion Probe Checking thin and thick food Check the internal temperature of food, especially thin food Check the temperature of flat cooking equipment Check the temperature of food and equipment surfaces without touching it Check the temperature of liquids Check the temperature inside coolers and ovens Check during receiving or food in a hot- or cold-holding unit