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Detect Gas Changes with a Practical Air Sensor
The Gas CO Combustible Analog Sensor MQ9 For Arduino Gravity is a gas sensor with analog output designed for air-quality projects, leak alerts, and ventilation monitoring. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Power supply needs: 5V; Interface type: Analog; Size: 36.4x26.6mm(1.43"x1.05").
Important: Most gas and chemical sensors work best after warm-up and calibration. Readings can drift with temperature, humidity, and sensor age.
Why you’ll love it
- Key feature: High sensitivity to Methane, Propane and CO
- Gravity Analog Cable x1: Gravity Analog Cable x1
- Useful spec: Semiconductor
- Easy wiring: Analog
- Power range: 5V
- Compact size: 36.4x26.6mm(1.43"x1.05")
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| Gas CO Combustible Analog Sensor MQ9 For Arduino Gravity | gas sensor with analog output | Current item |
| Gas LPG Butane Propane Methane Alcohol Sensor Analog MQ2 For Arduino Gravity | gas sensor with analog output | analog output, gas detection |
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| Hydrogen Gas Analog Sensor MQ8 For Arduino Gravity | gas sensor with analog output | analog output, gas detection |
What you can build
This sensor is a good fit for gas leak alarms, indoor air monitors, safety demos, ventilation control, and science projects.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard and jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include fresh-air test setup, an enclosure with vents, and a display for local readout, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | Gas CO Combustible Analog Sensor MQ9 For Arduino Gravity |
|---|---|
| Sensor Type | Semiconductor |
| Interface type | Analog |
| Power supply needs | 5V |
| Size | 36.4x26.6mm(1.43"x1.05") |
| Interface | Analog |
| Category | gas sensors |
Wiring & usage notes
Connect power and ground, then read the sensor output with an analog-capable input or external ADC. Stable power and a clean ground help reduce noise. Most gas and chemical sensors work best after warm-up and calibration. Readings can drift with temperature, humidity, and sensor age.
What’s in the box
1 × Gas CO Combustible Analog Sensor MQ9 For Arduino Gravity
Frequently Asked Questions
What does the Gas CO Combustible Analog Sensor MQ9 For Arduino Gravity measure?
It is designed to measure gas concentration changes in air.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this Analog sensor?
This sensor gives an analog-style signal, so you read it with an ADC or an analog-capable input.
Does it need calibration?
Yes. Chemical and gas sensors usually need warm-up time, calibration, and periodic checking if you want stable readings.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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