Features:
- high reliable computer control for sensor opereation and signal processing
- design for a low number of external electric components to connect
- 3 level indication accordance with CO gas concentration
- audible alarm on time-weighted averaging of CO gas concentration
- option for mono color or tri color LED drive
- option for external drive or self-drive buzzer
- function for self diagnostic circuit
- buzzer test/mute function
- function for externsl input/output
- watchdog timer
- simplified gas calibration mode
- conform to standard UL2034
