MQ135 MQ135 Air Quality Sensor Hazardous Gas Detection Sensor Module for Arduino Environmental Measurement

Product synopsis: Features: Size: 32X20X22mm/1.25*0.78*0.86” The main chip: MQ135 gas sensing probe Operating voltage: DC 5V Power (current) : 150mA DO Output: 0.1V/5V AO Output: 0.1-0.3V Signal output indicator instructions Dual signal output (analog output, and TTL level output) TTL output valid signal is low; (output low signal light, which can be accessed microcontroller IO port) Analog output with increasing concentration, the higher the concentration, the higher the voltage Sulfide, benzene Department of steam, smoke and other harmful gases with high sensitivity Has a long life and reliable stability Rapid response recovery characteristics Applications: A hazardous gas detection apparatus for the family, the environment, suitable for ammonia, aromatic compounds, sulfur, benzene vapor, smoke and other gases harmful gas detection, gas-sensitive element test concentration range: 10 to 1000pp