MQ-4 Gas Sensor Module
The MQ-4 Gas Sensor Module is a highly sensitive and reliable device engineered to detect methane (CH₄) and natural gas concentrations in the air. Employing a gas-sensitive semiconductor sensor, this module delivers exceptional sensitivity to methane, ensuring rapid response and recovery times. It serves as a critical component in gas leak detection systems, industrial safety applications, environmental monitoring setups, and smart home devices.
Features:
- The gas sensing material used in the MQ-4 gas sensor is tin dioxide (SnO2) with low conductivity in clean air.
- It adopts high quality double panel design with power indication and TTL signal output indication
- It has DO switch signal (TTL) output and AO analog signal output
- The TTL output valid signal is low. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module)
- The voltage of the analog output, the higher the concentration, the higher the voltage.
- It has good sensitivity to gas and natural gas detection.
- there are four screw holes for easy positioning;
- product dimensions: 32 (L) * 20 (W) * 22 (H)
- has a long service life and reliable stability
- quickly response recovery characteristics
The digital output D0:
With the help of the potentiometer placed on the reverse side of the board, set is the threshold above which the output D0 is changed from a high to a low status. The output D0 can be linked directly with a microcontroller or commissioning set, including Arduino, or for example, with a module of a buzzer which will signal too low or high level of gassing the air.
Analog output A0:
The sensor has an analog output A0 which must be connected to the pin of the converter A/D (of analog input in Arduino). This will allow you to measure the proportional voltage signal and more accurately determine the concentration.
Pin Configuration:
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VCC: Power supply input (5V DC).
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GND: Ground.
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AO: Analog output, providing a voltage signal proportional to gas concentration.
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DO: Digital output, delivering a high or low signal based on the set threshold.
Specifications:
- Detection of gas: Natural gas/Methane
- Detection of Concentration:300-10000ppm
- Input voltage: DC5V
- Power consumption (current): 150mA
- Power supply: from 2.5 V to 5 V
- Analog and digital output
- Pins: Pin connectors, 2.54 mm pitch
- Board sizes: 32 (L) * 20 (W) * 22 (H)
- It has mounting holes with diameter: 2 mm
Application:
- Detecting methane gas leaks in residential and commercial settings.
- Monitoring methane levels in industrial environments for safety.
- Environmental monitoring to track methane emissions.
- Automotive systems to monitor exhaust gases.
- Integration into smart home safety systems.
Package Include:
- 1x MQ-4 Gas Sensor Module.
