Perfect Jumbo digit thermometer for monitoring freezers, water baths, heating blocks, incubators, and refrigerators. Accurately monitors temperatures with its enclosed temperature-buffered sensor. Bottle insulates sensor from rapid temperature changes when refrigerator door is opened. 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 degree F and -50 to 70 degree C with a resolution of 0.1 degree and accuracy of +/-1 degree C. Alarm feature provides alert when temperature rises above or falls below a set point. Alarm is programmable in 1 degree increments. Ten-foot micro-cable permits refrigerator Doors to close on it. Solid-state probe eliminates mercury contamination. Probe is sealed in a miniature bottle (1 x 1-1/2 inch) filled with patented nontoxic glycol. Solution is Gras (generally recognized as safe) by the (food and Drug Administration). eliminates contact with food or drinking water. To assure accuracy an individually serial-numbered traceable certificate is provided from Control Company ISO/IEC 17025 (1750.01) calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of standards and technology). supplied: traceable certificate, flip-open stand, wall mount, Velcro, magnet, and AAA alkaline battery (replacement battery, cat. Number 350-19942). easy-view, Jumbo 1-1/2 inch-high digits may be read from 30 feet. Sensor and 10-ft cable perform accurately even when under water. High-impact, chemical-resistant ABS plastic case is 3-D/8 x 4-3/8 x 7/8 inches. Weight is 4 ounces.