This breakout board is designed to work with any of the MQ-series gas sensorssimplifying the interface from 6 to 4 pins—groundpower and analog voltage output & digital out —that are broken out with a 0.1" spacingmaking the board compatible with 0.1" headers and standard breadboards and perfboards.
High quality double panel designwith power and TTL signal output indicator.
With DO switch signal (TTL) output and AO analog signal output.
TTL output effective signal for low level (when output lower than usually the signal lightcan be directly meet SCM or relay module) .
Analog output voltage: 0~5Vthe higher concentrationthe higher voltage.