Methane CNG Gas Sensor Module MQ4 (MQ-4)

Description: This is a simple-to-use compressed natural gas (CNG)sensor, suitable for sensing natural gas (composed of mostly Methane [CH4]) concentrations in the air. The MQ-4 can detect natural gas concentrations anywhere from 200 to 10000ppm.

• Operating voltage 5V
• Operating current 40mA
• Both digital and analog output
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• Popular sensor - a lot of examples available for different platforms 
• Port explanation : AO for analog output, DO for digital output, GND for ground, VCC for 5V voltage input

DOCUMENTS

• SNS-MQ4 datasheet
• Setting up SNS-MQx sensors
• Experimenting with gas sensors and Arduino