MIC-600 fixed ozone detector is used for 24-hour continuous online monitoring of gas concentration and measurement of temperature and humidity on site. It displays concentration and over limit sound and light alarms on site, and remote data transmission. Adopting a 2.5-inch high-definition color screen for real-time display of concentration, imported brand sensors (Honeywell, Nippon Genshin, CITY, Alpha, Dynament, Membrapor, etc.) are selected according to different detection gases. The detection principles include electrochemical, infrared, catalytic combustion, thermal conductivity, PID photoionization, etc. Our company has its own circuit design and mature kernel algorithm processing, and has obtained multiple software copyrights, thus giving birth to this multifunctional fixed composite gas detection and alarm device.