MQ-4 Methane Gas Sensor Module

MQ4 Gas senso r is a Metal Oxide Semiconductor (MOS) type Gas Sensor mainly used to detect the Methane (CNG) gas concentration in the air either at home or in industry.

• This sensor contains a sensing element, mainly aluminum-oxide based ceramic, coated with Tin dioxide, enclosed in a stainless-steel mesh.
• Whenever gas comes into contact with the sensing element, the resistivity of the element changes.
• The change is then measured to get the concentration of the gases present.
• Its sensing range of 300-10000 PPM is suitable for gas leak detection.
• The combustion of Methane is highly exothermal means it will release a vast amount of heat if ignited which when used in a controlled way is beneficial but if an accident occurs it will be devastating.
• Specifications Power requirements: VCC - 5V±0.1 DO output: TTL digital 0 and 1 (0.1 and 5V) AO output: 0.1-0 .3 V (relative to pollution), for maximum concentration of a voltage of about 4V Detection Gas: Natural gas/Methane Detection Concentration: 200-10000ppm (Natural gas / Methane) Interface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR) Heater consumption: less than 750mw Operating temperature: 14 to 122 °F (-10 to 50°C) Preheat time: Over 24 hours Product To use the Sensor Module, you have power the device with 5V supply and the Power LED will start to glow.
• You should give it some time for its preheating period before start reading the output.
• While measuring the gas present, the Output LED will glow in a specific concentration of the gas.
• You can change it by using the potentiometer.
• Else you can also use the Analog Output to see how your program reacts to different concentrations of gases present.
• Additional Resources MQ4 sensor Datasheet MQ4 Mehane Gas Sensor Based Arduino Project.