MQ-4 Gas Sensor Module

৳ 145

MQ-4 Gas Sensor Features

  • Good sensitivity to Combustible gas in wide range
  • High sensitivity to CH4, Natural gas.
  • Small sensitivity to alcohol, smoke.
  • Fast response Stable and long life
  • Simple drive circuit

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MQ-4 Gas Sensor Module

This is a simple to use MQ-4 High Sensitivity Gas Methane (CNG) Detector Sensor Module which can sense the presence of Compressed Natural Gas(CNG), methane(CH4), etc. in the air. The module uses our MQ-4 sensor. It simplifies the interface to the odd pin spacing of the sensor and provides the interface through standard 4 x 0.1″ header pins.

It provides an analog output corresponding to the concentration of the gases in the air and an easy-to-use digital output. The onboard potentiometer can be used to set the maximum gas concentration beyond which the digital output gets triggered. The MQ-4 can detect natural gas concentrations anywhere from 200 to 10000ppm.

Just power the module with 5V set the threshold and you can start getting the gas concentration of the air around the sensor! An onboard LED signals the presence of any gas.

The digital output can be easily interfaced with microcontrollers and other circuits. The analog output can be hooked up to an ADC of a microcontroller to get a wide range of sensor readings. This is a simple-to-use compressed natural gas (CNG) sensor, suitable for sensing natural gas (composed of mostly Methane [CH4]) concentrations in the air.

MQ-4 Gas Sensor Specifications

  • Sensor Type Semiconductor
  • Power requirements: VCC – 5V±0.1
  • DO output: TTL digital 0 and 1 (0.1 and 5V)
  • AO output: 0.1-0 .3 V (relative to pollution), the maximum concentration of a 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 is 21% (standard condition) – Oxygen concentration can affect sensitivity
  • Load resistance: 20KΩ
  • Sensing Resistance Rs: 10KΩ- 60KΩ (1000ppm CH4)
  • Preheat time: Over 24 hour
  • Standard Encapsulation Bakelite, Metal cap

Pinout Configuration

Pin NameDescription
VCCThis pin powers the module, typically the operating voltage is +5V
GNDUsed to connect the module to system ground
Digital Out (DO)You can also use this sensor to get digital output from this pin, by setting a threshold value using the potentiometer
Analog Out (AO)This pin outputs 0-5V analog voltage based on the intensity of the gas
The MQ-4 Gas Sensor Module works primarily by sensing the amount of methane or natural concentration gas in the air. Therefore immediately the mq4 senses methane, the sensor’s analog pin produces an analog signal similar to the quantity of CH4 in the air.

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Also do not forget to check out our other Gas / Air modules in the Gas & Air section. Thank you.


এটি MQ-4 উচ্চ সংবেদনশীলতা গ্যাস মিথেন (CNG) ডিটেক্টর সেন্সর মডিউল ব্যবহার করা সহজ যা বাতাসে সংকুচিত প্রাকৃতিক গ্যাস (CNG), মিথেন (CH4) ইত্যাদির উপস্থিতি অনুভব করতে পারে। মডিউলটি আমাদের MQ-4 সেন্সর ব্যবহার করে। এটি সেন্সরের বিজোড় পিন ব্যবধানে ইন্টারফেসটিকে সরল করে এবং স্ট্যান্ডার্ড 4 x 0.1″ হেডার পিনের মাধ্যমে ইন্টারফেস সরবরাহ করে।

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