TPI 317C Auto Field Calibrated Pocket Digital Thermometer with Air Tip and 2.8" Stem, -50 to 150 Degrees C, -58 to 300 Degrees F, Accuracy of + or - 1 Degree C Digital thermometer for monitoring temperature in food service, electrical testing, and heating, ventilation, and air conditioning applications Measures temperature from -50 to 150 degrees C (-58 to 300 degrees F) with an accuracy of + or - 1 degree C (2 degrees F) Thermometer can be calibrated in an ice bath to preserve the accuracy of readings LCD screen shows the current temperature in degrees C or F Stem-style probe is 2.8" long and has an air tip that takes air temperature measurements more quickly than a contact probe or penetration probe