The Triplett RHDL50 USB Temperature and Humidity Datalogger with Certificate of traceability to NIST standards. It can record up to 16,000 readings each for Temperature and Humidity in virtually any indoor setting. This can eliminate 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. The RHDL50 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 a PC.