Gravity: Arduino CO/Combustible Gas Sensor (MQ9)
The Gravity MQ-9 gas sensor detects carbon monoxide (CO) and combustible gases including methane and propane. It uses a semiconductor SnO2 sensing element that cycles between high and low temperatures — detecting CO at low temperature (1.5V) and combustible gases at high temperature (5.0V).
With a DFRobot Gravity interface, the sensor connects directly to any Arduino analog input for plug-and-play operation. Sensitivity is adjustable via an onboard potentiometer, and the analog output is proportional to gas concentration.
Key Features
- Dual Gas Detection – Detects both CO (10–1,000 ppm) and combustible gases (100–10,000 ppm)
- High Sensitivity – Particularly responsive to methane, propane, and carbon monoxide
- Gravity Interface – Plug-and-play analog connection to Arduino boards
- Adjustable Sensitivity – Onboard potentiometer for fine-tuning detection thresholds
- 5V Power Supply – Standard voltage for easy integration
- Compact Size – 36.4 × 26.6 mm (1.43" × 1.05")
Ideal For
- Domestic gas leakage detectors
- Industrial gas monitoring systems
- Portable gas detection devices
- Air quality monitoring projects
Package Contents
- 1× MQ-9 CO/Combustible Gas Sensor
- 1× Gravity Analog Cable
Resources
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Gravity MQ-9 gas sensor detects carbon monoxide (CO) and combustible gases including methane and propane. It uses a semiconductor SnO2 sensing element that cycles between high and low temperatures — detecting CO at low temperature (1.5V) and combustible gases at high temperature (5.0V).
With a DFRobot Gravity interface, the sensor connects directly to any Arduino analog input for plug-and-play operation. Sensitivity is adjustable via an onboard potentiometer, and the analog output is proportional to gas concentration.
Key Features
- Dual Gas Detection – Detects both CO (10–1,000 ppm) and combustible gases (100–10,000 ppm)
- High Sensitivity – Particularly responsive to methane, propane, and carbon monoxide
- Gravity Interface – Plug-and-play analog connection to Arduino boards
- Adjustable Sensitivity – Onboard potentiometer for fine-tuning detection thresholds
- 5V Power Supply – Standard voltage for easy integration
- Compact Size – 36.4 × 26.6 mm (1.43" × 1.05")
Ideal For
- Domestic gas leakage detectors
- Industrial gas monitoring systems
- Portable gas detection devices
- Air quality monitoring projects
Package Contents
- 1× MQ-9 CO/Combustible Gas Sensor
- 1× Gravity Analog Cable
