MQ-7 Carbon Monoxide (CO) Gas Sensor

Name: MQ-7 Carbon Monoxide (CO) Gas Sensor
SKU: TS-P1427
Availability: InStock

The MQ-3 Working Principle. When alcohol vapours are present, they react with oxygen ions on the surface of the tin dioxide (SnO₂) layer, reducing resistance.

$3.95

10 in stock

This item: MQ-7 Carbon Monoxide (CO) Gas Sensor

10 in stock

$3.95

Male Header 16 Pin Straight 2.54mm 5 pack

1 × Male Header 16 Pin Straight 2.54mm 5 pack

83 in stock

$1.95

Right Angle 10 Pin PCB Mount Boxed Header

1 × Right Angle 10 Pin PCB Mount Boxed Header

147 in stock

$0.65

Title	Qty	Discount
Qty Discount	4 - 9	5% $3.75
Qty Discount	10 +	8% $3.63

SKU: TS-P1427

Categories:Components & Parts, Gas Sensor

Description

Additional information

Applications

Support & Utility

Q & A

The MQ-7 Gas Sensor is a semiconductor sensor designed specifically for detecting carbon monoxide (CO). It is widely used in indoor air quality monitoring, gas leak detection, and safety alarm systems.

The sensor uses a SnO₂ (tin dioxide) sensitive layer that changes resistance in the presence of CO, providing an analog voltage output proportional to the gas concentration.

Specifications:

Gas sensor – MQ-7
Detectable Gases: Carbon monoxide (CO)
Detection range20 – 2000 ppm
Heater voltage (V<sub>H</sub>): 5V ±0.2V
Heater resistance:31 Ω ±3 Ω
Load resistance: Adjustable (typically 20 kΩ)
Heater consumption: ≤900 mW
Preheat time: 24 hours for best stability
Output type: Analog voltage (0–5V)
Dimensions: 16.5mm Diameter, 9.5mm High excluding pins, Pins – 6mm
Note: Outer Case colour can change, Black, Orange, Red or Grey

Package Includes:

MQ-7 Carbon Monoxide (CO) Gas Sensor

	Check out our Clearance and on-sale items. Development Resources: Demo Codes, Schematics, Datasheets, Etc
	Hackaday serves up fresh hacks every day from around the Internet.
	Instructables is a community for people who enjoy creating and sharing their projects. Explore, share, and do your next project with us!
	Where the world builds software
	Raspberry Pi Foundation: What would you like to make today?
	Arduino’s mission is to enable anyone to enhance their lives through Accessible electronics and Digital Technologies.
	Wikipedia is a free online Encyclopedia created and edited by volunteers worldwide and hosted by the Wikimedia Foundation.
Notes:	There may be slight size deviations due to manual measurement and variations in measurement. Due to variations in photography lighting and angles, the picture may not accurately reflect the actual colour of the item.