MQ-7 Carbon Monoxide Gas Sensor Module

The MQ-7 CO Carbon Monoxide Coal Gas Sensor Module detects the concentrations of CO in the air and outputs its reading as an analog voltage. The sensor can measure concentrations of 10 to 10,000 ppm.

The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V.

This module provides both digital and analog outputs. The threshold level for digital output can be easily adjusted using the preset on the board. The MQ-7 sensor module can be easily interfaced with Micro-controllers, Arduino and etc.

Technical Details

Type: Gas Sensor
Voltage: 5V
Sensitivity: ≥ 3%
Return time: ≤ 30 sec
Heater Resistance: ± 31Ω
Heater Current: ≤ 180mA
Heater Voltage: 5.0V ± 2V / 1.5 ± 1V
Heater Power: approx. 350mW
Temperature: -20°C ~ 50°C
Humidity: ≤ 95% RH
Oxygen Content: 21%
Dimensions: 35x20x11 mm
Weight: 20g

Standard Test Conditions

Temperature: 20°C ± 2°C
Humidity: 65% ± 5% RH
Standard Test Circuit: Vc: 5.0V ± 0.1V
Vh (high): 5.0V ± 0.1V
Vh (low): 1.5V ± 0.1V

Features

Product Type: Semiconductor gas sensor
Standard package: Metal Oxide packaging
High sensitivity, Fast response, and Long recovery life
Low power consumption
Simple drive circuit
Detection gas: Methane, natural gas, liquefied petroleum gas, hydrogen
Detectable concentration:
500-10000ppm for LPG and propane
1000-20000ppm for methane
500-10000ppm

Applications :

Home Safety: Detects carbon monoxide (CO) in homes to prevent poisoning.
Industrial Safety: Monitors CO levels in factories and workplaces with combustion processes.
Automotive Applications: Used in vehicle exhaust systems to monitor CO levels.
Breathing Safety Systems: Monitors CO levels in closed environments like submarines or space stations.
Portable Detectors: Handheld devices for field CO detection and safety checks.