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