Lutron GC-2028 二氧化碳侦测计4000 ppm

CO2 METER, Temperature. 
Model: GC-2028 
CO2 range : 0 to 4,000 ppm. 
CO2 sensor : NDIR, long term reliability. 
CO2 with alarm setting. 
Function : CO2 (Carbon dioxide), Dew point, Temperature. 
Data hold, Record (Max., Min.). 
RS232/USB computer interface.

datasheet