Traceable® digital humidity meter is for routine measurements, monitoring round-the-clock, 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. Memories store min/max readings, continuously and simultaneously displays relative humidity. Minimum and maximum memories may be displayed or cleared at any time with the touch of a button. Monitors conditions overnight, on weekends, or for any time period. Fast-response solid-state sensors show changes in less than 30 seconds. Display is updated once per second. Fulfills CLIA requirement. 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). Extra-large, easy-to-view digits can be read at a glance from as far away as 20-foot Meets federal requirements for CLIA specification 493.1252 for monitoring temperature and humidity. Self-contained, stable, accurate unit requires no adjustment or maintenance. Case is chemical-and shock-resistant ABS plastic. Supplied with Traceable® Certificate, wall mount, bench stand, fast-response solid-state sensors, and two AAA batteries. Replacement battery Cat. No. 1112. Functions: Relative humidity. Attachments: Wall mount, bench stand. Size: 2-5/8 x 3-7/8 x 5/8in. Humidity Range: 25 to 95%. Humidity Resolution: 1% RH. Humidity Accuracy: ±2% RH mid-range to ±4% RH elsewhere. LCD Display Height: 3/4in. Weight: 2-1/2oz. Control Company#: 4094.