Choosing Eiechip Feels Fantacy !!! 1.With signal output indicator light. 2.Size: 32mm X22mm X30mm length * width * height; 3.The main chip: LM393, MQ-x gas sensing probe; 4.Working voltage: DC 5V; 5.With signal output indicator light; 6.The dual signal output (analog output and TTL output); 7.The analog output and increased with the increase of concentration, the higher the concentration higher voltage; 8.Has a very high sensitivity to sulfide, benzene vapor, smoke and other harmful gases; 9.With a long service life and reliable stability; 10.Quick response and recovery characteristics; 11.With mounting holes, easy mounting; 12.The probe can be plug design, convenient test Application: For harmful gas family, environment detection device, is suitable for the detection of the ammonia, aromatic compounds, sulfide, benzene vapor, smoke and other harmful gas, gas sensitive element concentration range: 10 to 1000ppm provides reference cases. Package Included: 1 * MQ-2 1 * MQ-3 1 * MQ-4 1 * MQ-5 1 * MQ-6 1 * MQ-7 1 * MQ-8 1 * MQ-9 1 * MQ-135

Has a very high sensitivity to sulfide, benzene vapor, smoke and other harmful gases. The analog output and increased with the increase of concentration, the higher the concentration higher voltage. The dual signal output (analog output and TTL output). Quick response and recovery characteristics. MQ-2 gas sensor sensitive material used in the clean air low conductivity tin oxide (SnO2). When there is the environment in which the combustible gas sensor, conductivity sensor with increg concentration of combustible gases in air increases.