Air Quality Meter + data logger, CO2, CO, O2, Humidity, Dew point, Temp. ,6 in 1

Air Quality Meter + data recorder
CO2, CO, O2, Humidity, Dew point, Temp. 6 in 1
* CO2 range : 0 to 4,000 ppm x 1 ppm.
* O2 range : 0 to 30.0 % x 0.1 %.
* CO range : 0 to 1,000 ppm x 1 ppm
* Humidity range: 10 to 95 %RH.
* Dew point Temp. and Wet bulb Temp. measurement.
Sampling Time: 2 sec to 8 hour 59 min. 59 sec
Data Output: RS 232/USB PC computer interface