TPI 306XC Auto Field Calibrated Pocket Digital Thermometer with Penetration Tip, Protective Boot, and 5" Stem, -50°C to 150°C Degrees, Accuracy of + or - 1% of Reading W/ A306. 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 with an accuracy of + or - 1% of the reading. Thermometer can be calibrated in an ice bath to preserve the accuracy of readings. LCD screen shows the current temperature in degrees C. Stem-style probe is 5" long and has a penetration tip for taking measurements while immersed in liquid or air.