Perfect jumbo digit thermometer for monitoring freezers, water baths, heating blocks, incubators, and refrigerators. Accurately monitor temperatures with this enclosed temperature-buffered sensor. Bottle insulates sensor from rapid temperature changes when refrigerator door is opened. Thermometer fulfils all CDC thermometer and vaccine thermometer requirements. Triple display simultaneously shows maximum, minimum, and current probe temperatures plus room temperature. MIN/MAX monitors high/low readings overnight, on weekends, or for any time period—a significant advantage over current reading-only glass thermometers. Range is –58 to 158°F and –50 to 70°C with a resolution of 0.1° and accuracy of ±1°C. Signals out-of-range conditions Alarm feature provides alert when temperature rises above or falls below set points. Alarm is programmable in 1° increments. Ten-foot micro-cable permits refrigerator doors to close on it. Solid-state probe eliminates mercury contamination in refrigerators. Probe is sealed in a miniature bottle (1 x 2-1/2 inches) filled with nontoxic glycol. Solution is GRAS (generally recognized as safe) by the FDA (Food and Drug Administration). Eliminates concerns about incidental contact with food or drinking water.