Gravity MQ-9 Gas Sensor Module – CO, Methane & Propane

The awesome advancements of modern technology and electronic sensors allow Makers to see more than our eyes ever could. Sometimes, that ability is lifesaving. The MQ-9 Gas Sensor Module is an environmental sensor to detect the presence of combustible gases. Part of the Gravity series, this MQ-9 sensor is built onto a breakout board for easily integrating the sensor into a circuit. The convenient operating voltage of 5V caters for standard light-weight electronics projects. The gas sensor uses the conductivity of the material S_nO₂ (Tin Oxide) within the netted dome to identify whether CO and combustible gases are present, with various levels of conductivity being translated to corresponding levels of gas saturation in the surrounding air.

The Gravity MQ-9 Gas Sensor offers fast response times and detection cycling between high and low temperature to find CO, methane and propane in the air. Capable of identifying CO at 10 per 1000 parts per million (ppm) and combustible gases at 100 per 10,000ppm, the sensor unit is perfect for domestic and industrial gas detector applications. These features, in conjunction with the long lifespan of materials used to build the Gas Sensor, make it an excellent investment for anyone who might be concerned with the saturation levels of dangerous gases within a home, workplace or even factory environment.

Typical Applications for the Gravity MQ-9 Gas Sensor Module:

The MQ-9 Gas Sensor Module is a valuable investment if you need to be able to sense the levels of CO and combustible gases in an environment, as it provides an early warning for dangerously high saturation levels. It is designed to detect dangerous levels within a minute and half at most, and can be connected to almost any circuit – allowing it to be used for safety automation or as a visual or audible alarm.

The module has also been designed in Breakout Board style, with an easy gravity analog cable to simply connect to with a control board like an Arduino. So, whether you want to connect this sensor up to an audible alarm, an automated reaction system or even to the internet in order to alert you via mobile or internet messaging services, this MQ-9 Gas Sensor Module is a good quality yet inexpensive solution.

Additional Resources:

• If you’re unsure where to start, we recommend taking a look at the original DFRobot Gravity MQ-9 Gas Sensor Wiki Page, where you can find a good range of resources, including schematics and sample codes.

As self-proclaimed “Robo-holics”, DFRobot is a company comprised of over 100 staff members, of which 30% are engineers who love to build robots. It was started in 2008 with the goal of embracing and promoting open-source hardware, with a core focus on Arduino, Raspberry Pi and their very own LattePanda development boards. Since then, DFRobot have manufactured over 1300 unique modules, sensors and components that all work together and complement each other, allowing users like us to enjoy a full spectrum of cutting edge robotics and electronics without having to pay premium prices.

With the primary goal of developing and manufacturing great quality products, while making them accessible to as many people as possible, DFRobot are rapidly becoming one of the most common-place brands in the world of open-source robotics and electronics. With more than 1300 products developed in-house, and an impressive range of different categories and specialisations, there are few brands in the world who can compete in terms of quality, accessibility and genuine innovation.