CO2 METER, + Humidity, Temperature. GCH-2018[Mar. 8, 2011 23:12:48]
* CO2 range : 0 to 4, 000 ppm.
* CO2 sensor : NDIR, long term reliability.
* CO2 with alarm setting.
* Function : CO2 ( Carbon dioxide ) Humidity, Dew point, Temperature.
* Data hold, Record ( Max., Min.) .
* RS232/ USB computer interface .