MQ-4 Methane Gas Sensor Module

This is a simple-to-use compressed natural gas (cng) sensor, suitable for sensing natural gas (composed of mostly methane [ch4]) concentrations in the air. The mq-4 can detect natural gas concentrations anywhere from 200 to 10000ppm*Dual Output :- The switching signal having a DO (TTL) output and analog output AO*Compact and Ready to use design & Professional High Quality Glass PCB Layout Design for Noise Reduction