Gravity: MQ9 Gas Sensor - CO & Combustible Gas Detector

Arduino CO/Combustible Gas sensor detects CO and gases using MQ-9 with SnO2 material. Adjustable sensitivity, analog output, suitable for diverse applications.

Output1
Gravity MQ9 analogue gas sensor output. DFRobot product specification states Output Signal: Analog (0-5V) and Pin Definition: 1-Output.
Type · analog outputVoltage · 0-5V analogue output per DFRobot product specification
VCC2
5V DC supply input. DFRobot product specification states Operating Voltage: 5V DC ±5% and Pin Definition: 2-VCC.
Type · powerVoltage · 5V DC ±5% per DFRobot product specification
GND3
Ground reference. DFRobot product specification states Pin Definition: 3-GND.
Type · groundVoltage · 0V

Pin	Position	Type	Function	Voltage

Start wiring

0-5V analogue output per DFRobot product specification · 5V DC ±5% per DFRobot product specification

Verify supply voltage and logic levels before powering up.

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

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4 groups

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Pinout

Start wiring

Air quality

Temp and humidity

Environment sensors

Light and colour