The RH-Temp Data Logger is a compact device that measures and logs relative humidity and temperature over long periods of time. It can store up to 32,700 readings with measurement intervals as short as 1 second. The large LCD display shows logging information and two LEDs indicate alarm and recording status. Analysis software displays the logged data graphically or as text. It has a battery life of over 3 years and connects to a computer via USB to download the stored measurements.