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Introducing the MQ-4 Methane Gas Sensor, the ideal solution for detecting CH4 and CNG gases. With its advanced features and high sensitivity, this sensor ensures accurate and reliable gas detection in a wide range of applications.


  • Wide Range Sensitivity: The MQ-4 Methane Gas Sensor offers excellent sensitivity to combustible gases, allowing it to detect a variety of gases efficiently.
  • High Sensitivity to CH4 and Natural Gas: With its specialized design, this sensor provides exceptional sensitivity to CH4 and natural gas, ensuring accurate and timely detection.
  • Small Sensitivity to Alcohol and Smoke: The sensor exhibits minimal sensitivity to alcohol and smoke, preventing false alarms and ensuring accurate gas detection.
  • Fast Response and Stability: The MQ-4 sensor boasts a fast response time, enabling quick detection of gas presence. Additionally, it offers exceptional stability and long life for extended and reliable operation.
  • Simple Drive Circuit: Featuring a straightforward drive circuit, this sensor is easy to integrate into existing systems or projects.


  • Sensor Type: Semiconductor
  • Power Requirements: VCC – 5V±0.1
  • Digital Output (DO): TTL digital 0 and 1 (0.1 and 5V)
  • Analog Output (AO): 0.1-0.3 V (relative to pollution), maximum concentration voltage of about 4V
  • Detection Gas: Natural gas/Methane
  • Detection Concentration: 200-10000ppm (Natural gas / Methane)
  • Interface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR)
  • Heater Consumption: Less than 750mW
  • Operating Temperature: 14 to 122 °F (-10 to 50°C)
  • RH Related Humidity: Less than 95%Rh
  • O2 Oxygen Concentration: 21% (standard condition) – Oxygen concentration can affect sensitivity
  • Load Resistance: 20KΩ
  • Sensing Resistance Rs: 10KΩ – 60KΩ (1000ppm CH4)
  • Preheat Time: Over 24 hours
  • Standard Encapsulation: Bakelite, Metal cap


  • VCC: Powers the module, typically operating at +5V
  • GND: Connects the module to system ground
  • Digital Out (DO): Provides digital output based on set threshold value
  • Analog Out (AO): Outputs 0-5V analog voltage based on gas intensity


  1. Gas Leakage Detection: The MQ-4 Methane Gas Sensor is an essential component in gas leakage detection equipment for homes and industries, ensuring the safety of occupants and preventing potential hazards.
  2. Industrial Combustible Gas Detector: With its reliable and accurate gas detection capabilities, this sensor is ideal for industrial settings where combustible gas detection is crucial for maintaining a safe working environment.
  3. Portable Gas Detectors: The compact and versatile design of the MQ-4 sensor makes it suitable for use in portable gas detectors, providing users with a portable and reliable solution for gas detection on the go.

Ensure safety and peace of mind with the MQ-4 Methane Gas Sensor. Its advanced features, high sensitivity, and ease of use make it the perfect choice for various gas detection applications. Order yours today and experience reliable and efficient gas detection like never before.



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