MQ135 MQ-135 Gas Sensor Air quality sensor

Features
First, size: 32mm X22mm X30mm L * W * H
Second, the main chip: LM393, MQ135 gas sensing probe
Third, the working voltage: DC 5V
Four characteristics:
1, with the signal output LED indicates;
2, the dual signal output (analog output and TTL level output);
3, TTL output valid signal is low; (lights on when output is low, which can be accessed microcontroller IO port)
4, analog output increases with the concentration, the higher the concentration, the higher the voltage;
5, sulfide, benzene vapors, fumes and other harmful gases with high sensitivity;
6, with a long life and reliable stability;
7, rapid response recovery characteristics;
8, with mounting holes for easy fixed installation;
9, the probe can plug design, easy to test.
V. Application:
For home, environmental harmful gas detection device, suitable for detecting ammonia, aromatic compounds, sulfur compounds, benzene vapors, smoke and other gases harmful gases, gas sensors tested concentration range: 10 to 1000ppm provided Reference Example.