• MQ-9 Carbon Monoxide and Combustible Gas Sensor Module for Arduino and Raspberry Pi.
  • MQ-9 Carbon Monoxide Gas Sensor Module for Arduino and Raspberry Pi, designed for high sensitivity and fast response.
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MQ-9 Carbon Monoxide Combustible Gas Sensor

MQ-9 Carbon Monoxide Combustible Gas Sensor

HK$25.00
HK$25.00
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Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

Product Features:

🔹 Gas Detection

  • Carbon Monoxide (CO)
  • Flammable gases (such as Methane, Liquefied Petroleum Gas (LPG), Propane)

🔹 High Sensitivity

  • Strong response to CO and combustible gases, ideal for air quality monitoring and alarm systems.

🔹 Fast Response and Recovery Time

  • Quickly detects changes in gas concentration and recovers promptly.

🔹 Adjustable Sensitivity

  • Built-in potentiometer allows fine-tuning of the detection threshold as needed.

🔹 Dual Output Design

  • Analog Output (AO): Continuous voltage output corresponding to gas concentration.
  • Digital Output (DO): High/Low level signal when gas concentration exceeds the set threshold.

🔹 Low Power Consumption

  • Suitable for long-term operation or battery-powered applications.

🔹 Simple Wiring Interface

  • Fully compatible with Arduino, ESP32, Raspberry Pi, and other development boards.

🔹 Preheat Requirement

  • Recommended to preheat the sensor for 24–48 second before first use for optimal detection accuracy.

🔹 Durable Design

  • Long service life, ideal for continuous monitoring applications.

Specifications:

  • Operating Voltage: 5V DC
  • Typical Detection Range:
    • Carbon Monoxide (CO): 10–1000 ppm
    • Flammable Gases: 100–10,000 ppm
  • Operating Temperature Range: -20°C to 50°C
  • Operating Humidity Range: 5%–95% RH (non-condensing)

Applications:

🏠 Smart Home Safety Systems
🛠 DIY Electronics Projects
🚗 In-vehicle Air Quality Monitoring
🏢 Industrial Environment Gas Detection

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