MQ-4 High Sensitivity Gas Methane Detector Sensor Detector Module fr Arduino AVR

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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.
? Signal output indicator
? Dual Signals output (analog output and TTL output)
? TTL output signal is low level, allows to connect with SCM directly
? Analog output 0~5V voltage
? High sensitivity
? Long working lifetime and stable performance
? Quick response and recovery
Technical Data:
? Chipset: LM393 / MQ-4 sensor
? Working voltage: DC 3~5V
? Detecting range: 300~10000ppm