The AS-1 CO2 Alarm Station is an audio/visual alarm to be mounted inside or outside the room to be monitored, and sound an alarm (both visible and audible) in the event of the CO2 level going above normal or safe levels. It can be linked to either low or the high level CO2 sensors, or it can be linked to both sensors for complete redundancy.
CO2 Alarm Station （AS-2）
The green LED indicator shows the CO2 level is below 800ppm which means the room is safe to entry. The yellow LED indicator shows CO2 level equal or above 800ppm which means supplemental CO2 is in use. The AS-2 will sounds an audible alarm and blinking red LED indicator in the event of the CO2 level going above normal or safe levels.