The Extech SD500 Humidity and Temperature Recorder records data to an SD card in Excel format so that it can be easily transferred to a PC for analysis. It has a dual LCD display that shows relative humidity and temperature simultaneously and a selectable data sampling rate of 5, 10, 30, 60, 120, 300 and 600 seconds. Each stored reading includes a date and time stamp, 10 to 95% relative humidity and 0 to 50 °C (32 to 122 °F) temperature ranges.