This is a simple breakout board for the MQ - 3, MQ - 4, MQ - 6, MQ - 7, and MQ - 8 gas sensors. With the Gas Sensor Breakout you will be able to utilize each oversized, oddly spaced pins featured on every MQ gas sensor product. This is an extremely handy and economical board to have around when detecting multiple types of gases.
All you need is the VCC at 5V, GND, and a resistor to an ADC, that is it!
Note: This is just the PCB. The appropriate sensors are listed below in the Recommended Products.