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