Gravity: Analog Gas Sensor (MQ2)

Gravity: Analog Gas Sensor (MQ2) — DFRobot — SEN0127

MQ2-based analog gas sensor detecting LPG, propane, and methane with adjustable sensitivity via onboard potentiometer. Outputs analog voltage; compatible with 5 V Arduino-class platforms.

Pinout

Logical pinout · physical placement not verified
GRAVITY: ANALOG GAS SEVCCSIGGND
  • VCC
    Type · Power
  • GND
    Type · Ground
  • SIG
    Type · Signal

Start wiring

I2C · Analog · UART · 3.3 – 5 V · Breakout

Waveshare lists MQ-2 for combustible gases and smoke, MQ-3 for alcohol, and MQ-135 for mixed indoor pollutants such as NH3, NOx, alcohol,…

Module pins: VCC, GND, SIG. Schematik maps them to your board in the app.

Air quality

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MQ gas sensors, VOC/eCO2 indicators, NDIR true-CO2 modules and PM1/PM2.5/PM10 particulate sensors — over 100 listings across very different detection chemistries.

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