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MQ-7 Sensor
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MQ-7 Sensor

Technical Documents

MQ-7 GAS SENSOR

Application Resources

Z2M part_number application resource Z2M part_number Project code MQ-7 Semiconductor Sensor for Carbon Monoxide

EMS-00010-F

(Last updated) Jun 20, 2026

MQ-7 Sensor

CO gas detection module

Subcategory
EMS - Input: Sensors

Description

The MQ-7 Carbon Monoxide Sensor Module is a gas sensor used to detect carbon monoxide (CO) in the air. It measures changes in conductivity to provide analog and digital outputs. It is widely used in safety systems, air quality monitoring, and IoT projects.

Manufacturer Details

Manufacturer Part Number
Hanwei Electronics MQ-7
Zhengzhou Winsen Electronics MQ-7
DFRobot MQ-7

Technical Specifications

Model MQ-7
Ambient temperature -20 ~ + 50 °C
Characteristic gas 100 ppm CO
Heating current ≤ 180 mA
Heating power approx. 350 mW
Heating resistance ± 31 Ω
Heating voltage 5.0V ± 2V / 1.5 ± 1V
Humidity ≤ 95% RH
Operating Voltage 5 V
Oxygen content 21%.
Range 10 ~ 1000 ppm
Return time ≤ 30 s
Sensitivity ≥ 3%.
Length 3.5 cm
Height 1.1 cm
Width 2 cm

Part Family Variants (8)

Variant Title Status
EMS-00010-A Smoke Gas Sensor Published
EMS-00010-B MQ-3 Sensor Published
EMS-00010-C MQ-4 Gas Sensor Published
EMS-00010-D MQ-5 Gas Sensor Published
EMS-00010-E MQ-6 LPG Gas Sensor Published
EMS-00010-F Current MQ-7 Sensor Published
EMS-00010-G MQ-135 Sensor Published
EMS-00010-H Hydrogen Sensor Published

Frequently Used Together

Frequently paired together in real-world projects.

ED - Electronic Device
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EDT-00001-F

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