The unit can be switched freely, and it is used for 24-hour continuous online monitoring of on-site gas concentration, on-site concentration , and remote signal transmission. It is suitable for detecting gas concentration in pipelines or confined spaces and atmospheric environments; gas leakage or high concentration single gas purity where various background gases are nitrogen or . It is widely used in petrochemical industry, industrial production, smelting and forging, electric power, coal mine, tunnel engineering, environmental monitoring, sewage treatment, bio-pharmaceutical, greenhouse cultivation, warehousing logistics, fire fighting, gas., Manufacturer: CVFRDD