Working principle of carbon monoxide alarm

Carbon monoxide gas alarm is an electronic device used to detect carbon monoxide gas. It can give sound or light alarm when the concentration of carbon monoxide in the air exceeds the standard. The carbon monoxide gas alarm uses carbon monoxide sensor to convert the concentration signal of carbon monoxide gas in the air into weak current or voltage signal, and then through one or two-stage signal amplification, it is transmitted to the single chip microcomputer for signal comparison and processing. If the signal exceeds the predetermined threshold, the single chip microcomputer will send out sound and light alarm signal to drive LED light, horn or buzzer.