MQ-9 Carbon Monoxide, Methane and LPG Gas Sensor Module

The MQ-9 Carbon Monoxide, Methane, and LPG Gas Sensor Module is a versatile sensor designed to detect the presence of carbon monoxide (CO), methane (CH4), and liquefied petroleum gas (LPG).

Here’s an in-depth overview of the MQ-9 sensor module:

• Purpose: The MQ-9 sensor module is engineered to identify carbon monoxide, methane, and LPG gases, making it a valuable component for safety applications and gas detection systems.
• Sensitivity: It exhibits high sensitivity to carbon monoxide, methane, and LPG gases.
• Principle: The sensor employs a semiconductor gas sensor, wherein the resistance of the sensing material alters based on the concentration of the target gases.

Features:

• Multi-Gas Detection: The MQ-9 module is specifically designed to detect multiple gases— carbon monoxide, methane, and LPG— in a single package.
• Analog and Digital Output: Like other MQ series sensors, the MQ-9 module offers both analog and digital outputs. The analog output can provide an estimate of the gas concentration, while the digital output can be set to trigger alerts when gas concentration surpasses a predetermined threshold.
• Adjustable Sensitivity: Many modules feature a potentiometer that permits users to adjust the sensor’s sensitivity.
• Affordability: The MQ-9 sensor module is cost-effective, making it a popular choice for various gas detection projects.

Using the MQ-9:

• Powering the Sensor: The sensor generally requires a 5V DC power supply.
• Calibration: To obtain precise readings, calibration may be necessary. This involves exposing the sensor to clean air to establish a baseline resistance value.
• Reading Values: Similar to previous MQ series sensors, you can use a microcontroller (e.g., Arduino) to read values from the MQ-9 sensor. Connect the analog output to an analog pin and the digital output to a digital input pin on the microcontroller.

Technical Details

• Model: MQ-9
• Current Consumption (mA): 150
• Operating Voltage (VDC): 5
• Do output: TTL digital 0 and 1 (0.1 and 5V)
• Ao output: 0.1-0.3V (relatively clean)

Physical Attributes

• Length * Width * Height (mm): 35 x 22 x 16
• Weight (gm): 7

Package Includes

• 1 x MQ-9 Carbon Monoxide, Methane, and LPG Gas Sensor Module