Carbon monoxide is a flammable gas and a toxic gas as well. According to the requirements of the design code for detecting flammable gases and toxic gases in petrochemical industry, only toxic gas detectors should be set up. Therefore, when choosing a detector where carbon monoxide is likely to leak, you should choose a carbon monoxide poisonous gas detector. Carbon monoxide detector can be used as a detection device for the poisonous gas carbon monoxide.Connect it to the combustible gas alarm controller in the combustible gas detection and alarm system. https://vedard.com/blog/co-carbon-monoxide-detector/ https://www.vedard.com/forum/smoke-and-heat-detector-relay-output-t15.html