This is a very simple Breakout Board for all types of MQ series GAS Sensor. You can use this breakout board with MQ2 GAS Sensor, MQ3 Alcohol Sensor, MQ4 Methane GAS Sensor, MQ6 LPG Gas Sensor, MQ7 Carbon Monoxide (CO) Sensor, MQ135 Air Quality Sensor.
All you have to do is to apply 5volts Vcc and Ground and it will provide you with analog output which can be directly connected to ADC or to any analog circuit.
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