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.
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 sensor comes in a package similar to our MQ-3 alcohol sensor, and can be used with the breakout board below.
Features
- High sensitivity to Combustible gas in wide range
- Can detect Methane,Coal gas,CO etc Combustible gas
- Adjustable Sensitivity , Stable Performance
- 5V Working Voltage , support both the output digital value and the output analog value
- Port explanation : DO for digital output, AO for analog output