Lutron AQ-9901SD Air Quality Meter, SD Card (6in1-CO2, CO, O2, Humidity, Dew point, Temp.)

SD Card real time recorder \nCO2, CO, O2, Humidity, Dew point, Temp. , 6 in 1 \nAIR QUALITY METER \nModel : AQ-9901SD \n* Real time recorder, save the data into the SD memory card and can be downloaded to the Excel, extra software is no need. \n* Air quality measurement application, multi-function : CO2 ( Carbon dioxide ), CO ( Carbon monoxide ), O2 ( Oxygen in air ), Humidity, temperature measurement. \n* CO2 range : 0 to 4,000 ppm x 1 ppm, max. 6000 ppm typically. \n* O2 range : 0 to 30.0 % x 0.1 %. \n* CO range : 0 to 1,000 ppm x 1 ppm. \n* Humidity range : 5 to 95 %RH. \n* Dew point : -25.3 to 48.9 °C, °C/°F. \n* Temp. range : 0 to 50.0 °C, °C/°F. \n* CO2 sensor : NDIR, long term reliability. \n* CO, O2 sensor : Galvanic cell type.