Online paint material carbon dioxide CO2 gas alarm: The carbon dioxide detector is a specialized alarm device used to detect the concentration of CO2 gas in the air. Its main working principle is that when the target gas enters the gas probe part, the sensor inside the carbon monoxide detector will immediately emit an induction. The sensor will generate a certain electrical signal according to the gas concentration. If it exceeds the set gas concentration alarm value, the instrument will sound and light an alarm to prompt.