Extech SD800 CO2, Humidity and Temperature Datalogger

From the Manufacturer Monitor air quality in schools, office buildings, greenhouses, hospitals and anywhere that high levels of carbon dioxide are generated. CO2/Humidity/Temperature Datalogger checks for Carbon Dioxide concentrations and records data on an 2G SD card in Excel format for easy transfer to a PC for analysis. A Triple LCD simultaneously displays all three parameters, 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. 0 to 4,000ppm CO2; 10 to 95-percent RH;-58 to 2372-Degrees F (-100 to 1300-Degrees C) Temperature. Complete with (6) AAA batteries, 2G SD card, Universal AC adaptor, and mounting bracket.