LED
LCD
Description
Protect lives and ensure air safety with the highly sensitive MQ7 Carbon Monoxide Gas Sensor Module. This premium electronic module is specifically engineered to detect toxic Carbon Monoxide (CO) concentrations in the air, making it a critical component for indoor air quality monitors, industrial alarms, and smart home safety applications. Operating on a 5V circuit with alternating high/low voltage phases for internal heating, it provides both a clean analog output (for measuring exact ppm concentration) and a digital output with an adjustable onboard potentiometer threshold. You can easily connect this module to your favorite microcontroller platform. To build your next environmental monitoring project, check out our compatible Arduino development boards.
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
High Carbon Monoxide Sensitivity: Specifically optimized to detect harmful Carbon Monoxide levels while minimizing cross-interference from other gases.
Dual Output Architecture: Outfitted with an analog voltage pin for linear ppm calculations and a digital toggle pin for quick warning alarms.
Onboard Potentiometer Calibration: Built-in multi-turn trim potentiometer allows precise adjustment of the digital output alarm threshold.
Long-Term Operational Stability: Premium metal mesh filter and tin dioxide formulation ensure stable sensing performance over time.
Seamless Board Integration: Works directly with popular development frameworks including ESP32, ESP8266, and Raspberry Pi.
Specifications
Model Component: MQ-7 Gas Sensor.
Operating Voltage: 5V DC.
Heating Voltage: High phase (5V for detection) and Low phase (1.4V for clearing element).
Analog Output (A0): 0V to 5V output relative to carbon monoxide concentration density.
Digital Output (D0): TTL digital toggle switch (0 and 1).
Detection Concentration Range: 10 to 1000 ppm (Carbon Monoxide).
Circuit Pinout: VCC, GND, DO (Digital Output), AO (Analog Output).
| Item Type: | Gas Sensor |
| Operating Voltage (V): | 5 |
| Sensitivity (dBm): | ≥ 3%. |
| Return time | ≤ 30 sec |
| Heater Resistance | ± 31 Ω |
| Heater Current | ≤ 180 mA |
| Heater Voltage | 5.0V ± 2V / 1.5 ± 1V |
| Heater power consumption | approx. 350 mW |
| Ambient Temperature (°C) | -20 ~ + 50 |
| Humidity Range | ≤ 95% RH |
| Oxygen content | 21%. |
| Length (mm): | 35 |
| Width (mm): | 20 |
| Weight (g): | 20 |
| Shipping Weight | 0.01 kg |
| Shipping Dimensions | 4 × 4 × 4 cm |
