Gas Detection Module MQ-2/MQ-3/MQ-4/MQ-5/MQ-6/MQ-7/MQ-8/MQ-9/MQ-135 Sensor Module for Arduino Starter DIY Kit

With signal output indicator light. 

Size: 32mm X22mm X30mm length * width * height; The main chip: LM393, MQ-x gas sensing probe; Working voltage: DC 5V; With signal output indicator light; The dual signal output (analog output and TTL output); The analog output and increased with the increase of concentration, the higher the concentration higher voltage; Has a very high sensitivity to sulfide, benzene vapor, smoke and other harmful gases; With a long service life and reliable stability; Quick response and recovery characteristics; With mounting holes, easy mounting; 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: MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 each one.