Description: This is a simple-to-use hydrogen gas sensor, suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm.

This sensor has a high sensitivity and fast response time. The sensor's output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.

This gas sensor can be used with the Gas Sensor Breakout, simplifying the interface from 6 to 3 pins-ground, power and analog voltage output-that are broken out with a 0.1" spacing. This board has two mounting holes and provides convenient pads for mounting the gas sensor's required sensitivity-setting resistor.

Pololu MQ gas sensor carrier with sensitivity-setting resistor
soldered in the horizontal/vertical orientation.

• MQ-8 Datasheet
• MQ Gas sensors, Arduino Playground tutorial
• Wiring Example for an MQ-series sensor