McKesson Datalogging Refrigerator / Freezer Thermometer, Digital Display 1074442

Display shows current, min/max temperatures with a 10-second refresh rate, accuracy of ±0.5°C and a 0.1° display resolution Certified, serialized and traceable and has been tested against a standard calibrated at the National Institute of Standards and Technology (NIST) Waterproof, external bottle probe with 2000 mm cable monitors refrigerators or freezer temperatures from -22 - 158° F (-30 - 70° C) Includes internal sensor to measure room temperatures from 32 - 122° F (0 - 50° C) Logs Data once per minute to once per 720 min according to user preference Powered by (3) 1.5 V Type AA batteries (or equivalent) with a life of ~2000 hours in continuous operation when no alarm was triggered, and low-battery indications