[B-7-4]MQ-4 Natural Gas Methane Gas Sensor Module

Features:
1,High sensitivity to Combustible gas in wide range
2,Can detect Methane,Coal gas,CO etc Combustible gas
3,Adjustable Sensitivity , Stable Performance
4,5V Working Voltage , support both the output digital value and the output analog value
5,Port explanation : DO for digital output, AO for analog output

Package Includes
2 x Arduino compatible Mini MQ4 Gas Sensor