Traceable® memory hygrometer/thermometer maintains accuracy with do-it-yourself calibration. Simultaneously displays both temperature and relative humidity on its dual 1-1/8-inch high LCD. Precision thermistor offers a temperature accuracy of ±1°C between 0 to 40°C, otherwise ±2°C, and a resolution of 0.1°. Reads fahrenheit and celsius. An audible click confirms each key entry. See listing for dew point model specifications. Microprocessor-based design provides unparalleled accuracy. Resistive polymer film sensor provides humidity readings. To assure accuracy an individually serial-numbered Traceable® Certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). At the touch of a button, recalls the minimum and maximum humidity and temperature readings captured during any time period. A special HOLD button permits freezing the display to capture readings. Features an auto-off battery saving function which may be deactivated. Unit is equipped with an output receptacle for transferring data to a computer. Use to monitor conditions in clean rooms, computer rooms, storage facilities virtually anywhere temperature and RH affect vital components and tests. Handsome, dual-tone ABS plastic case is both lightweight and rugged for extreme field or lab use. Supplied with probe/cable, Traceable® Certificate, hard plastic carrying case, and 9-volt battery for 100 hours of continuous use. Replacement battery Cat. No. 1112. Size: 7-1/8 x 2-3/4 x 1-1/4-Inch. Humidity Range: 10.0 to 95.0%RH. Temperature Range: 0.0 to 199.9°F; -18.0 to 93.0°C. Humidity Resolution: 0.1% RH. Temperature Resolution: 0.1°; ±2% mid-range. Humidity Accuracy: otherwise ±4%. Temperature Accuracy: ±1°C (0 to 40°C) otherwise 2°C. Probe Dimension: 2/3in dia. x 8-1/2in L. Cable Length: 3-foot Storage Temperature: -20 to 50°C. Operating Temperature: 0 to 60°C. Weight: 10-3/4oz. Control Company#: 4185.