The Triplett Model RHDL50-NIST USB Temperature and Humidity Datalogger can record up to 16,000 readings each for Temperature and Humidity in virtually any indoor setting. This can elimate the manual recording of data in labs, greenhouses, warehouses, HVAC systems, storage areas, office space, classrooms, museums, and other place where temperature and humidity have to me monitored. It features a user adjustable sampling rate from 2 seconds to 24 hours and high/low alarms with visual alert when settings are exceeded. 2 LEDs indicate the current status and the USB interface can be used for transferring recorded data to your PC. Includes 3.6V Lithium battery, analysis software, and Cert. of Traceability to NIST. 1 year warranty.