Air is one of the fundamental and important material conditions for human survival, and air quality is also one of the most concerning topics; Exhaust gas refers to the toxic and harmful gases emitted by people in their daily production, daily life, and other activities, especially from chemical, steel, and smelting plants. It usually causes serious environmental pollution and affects human health. Due to the many types of pollutants contained in exhaust gas, their physical and chemical properties are very complex, and their toxicity is also different. The exhaust gas from dye combustion contains sulfur dioxide, nitrogen oxides (NOx), hydrocarbons, etc. Due to the different raw materials and processes used in industrial production, various harmful gases and solid waste are emitted, containing various components such as heavy metals, salts, and radioactive substances; The exhaust emissions from automobiles contain hydrocarbons such as lead, benzene, and phenols. Scope and items of environmental air and exhaust gas detection: 1. Indoor air detection of formaldehyde, ammonia, triphenyl, ozone, radon, total volatile organic compounds (TVOC), etc. 2. Environmental air detection of formaldehyde, particulate matter, ozone, volatile organic compounds (VOC), etc. 3 Workplace air and exhaust gas detection: organic matter (benzene, toluene, xylene, non-methane total hydrocarbons, VOC, acrylonitrile, n-hexane, acetone, butanone, styrene, ethyl acetate, butyl acetate, etc.), metal (cadmium, manganese, copper, zinc, selenium, lead, chromium, tin, sodium, mercury, nickel, etc.), particulate matter (dust, inhalable particles), physical factors (illumination, fresh air volume, temperature, humidity, noise, etc.) 4 Generator exhaust gas detection for smoke, blackness, nitrogen oxides, sulfur dioxide, etc. 5. Canteen exhaust gas detection for oil smoke concentration, fire smoke (smoke, blackness, nitrogen oxides, sulfur dioxide), etc. 6. Boiler exhaust gas detection for smoke, blackness, nitrogen oxides, sulfur dioxide, etc