MQ-4 CNG Methane Natural Gas Sensor Module

The MQ-4 CNG Methane Natural Gas Sensor Module detects methane (CH4), CNG, and natural gases in the air across a range of 300ppm to 10000ppm. The methane sensor runs on 3V to 5V DC and uses the LM393 comparator IC (a chip that compares two voltage levels) to output a clean digital signal when gas concentration crosses a set level.

A non-obvious fact is that the MQ-4 sensor element needs a warm-up time of about 20 seconds after power-on before readings become reliable — most beginners skip this and get incorrect early readings. The mq4 sensor also responds to some other gases like hydrogen, so avoid using it in mixed-gas environments where accuracy is critical.

Hobbyists, and builders use this sensor for safety project and connect VCC, GND, and the digital output pin to get your first gas alert working. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability.

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Features:

• Detection range of 300ppm to 10000ppm covers household gas leak levels through industrial alert thresholds
• Detects methane, CNG, and natural gases making the module useful across kitchen and outdoor safety builds
• mq4 methane gas sensor onboard potentiometer lets you adjust sensitivity threshold without changing any code

Technical Specifications:

Applications:

• A kitchen gas leak alarm uses this sensor to detect methane and sound a buzzer
• Classroom safety demo lights an led when natural gas concentration crosses 300ppm in air
• Smart home gas monitor reads digital output and triggers a relay to cut the gas supply
• A methane gas detector project logs ppm readings for safety record

Package Includes:

• 1 x MQ-4 CNG Methane Natural Gas Sensor Module