MQ-4 Methane, Natural Gas Sensor Module, 5V AO + DO Output (2 Pcs)
$15.98
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MQ-4 Methane, Natural Gas Sensor Module, 5V AO + DO Output (2 Pcs)
$15.98
About this item
- MQ-4 module for methane, natural gas: SnO2 sensing element heated inside a metal mesh cap
- Analog output AO rises with gas concentration; digital output DO switches at a level you set
- 5V DC supply, 4-pin 2.54 mm header (VCC / GND / DO / AO), power and signal LEDs
- Onboard LM393 comparator and threshold potentiometer, so DO can drive a buzzer or LED with no extra code
- Two modules per pack; needs warm-up and your own calibration - a prototyping module, not a certified detector