Ideal for routine measurements, round-the-clock monitoring, quality-control needs and critical experimental requirements. Unique instrument shows the exact air conditions in labs, hoods, clean rooms, coolers, stockrooms, incubators, environmental chambers, and chemical storage areas. Extra-large, easy-to-view 0.6 inch-high digits can be read at a glance from as far away as 20 feet. Meets federal requirements for CLIA specification 493.1207 for monitoring temperature and humidity in labs. Continuously and simultaneously displays relative humidity and temperature in °F/°C with dual-recall memories. Minimum and maximum memories may be displayed or cleared at any time with the touch of a button. Now monitor conditions overnight, on weekends or for any time period. Extra-large, easy-to-view 0.6 inch-high digits can be read at a glance from as far away as 20 feet. Meets federal requirements for CLIA specification 493.1207 for monitoring temperature and humidity in labs. Temperature range is 32 to 122°F and 0 to 50°C with a resolution of ±1° and accuracy of ±1°C. Humidity range is from 25 to 95%, resolution is 1% RH and accuracy is ±2% RH mid-range to ±4% RH elsewhere. Fast-response solid-state sensors show changes in less than 30 seconds. Display is updated once per second. An individually serial-numbered Traceable® Certificate is supplied to indicate instrument traceability to standards provided by NIST (National Institute of Standards and Technology). Self-contained, stable, and accurate unit requires no adjustment or maintenance. Case is chemical- and shock-resistant ABS plastic. Supplied with Traceable® Certificate, wall mount and bench stand, and two AAA batteries. Size is 2-5/8 x 3-7/8 x 5/8 inches. Weight is 2-1/2 ounces.