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MQ-2 Gas Sensor Module For H2, LPG, CH4, CO, Smoke or Propane Detector Module ( Pack of 25)

MQ-2 Gas Sensor Module For H2, LPG, CH4, CO, Smoke or Propane Detector Module ( Pack of 25)

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  • This is MQ-2 Gas Sensor Module For H2, LPG, CH4, CO, Smoke or Propane Detector Module ( Pack of 25)
  • The Operating Voltage of the gas sensor is +5V.
  • Can be used to Measure or detect LPG, Alcohol, Propane, Hydrogen, CO and even methane.
  • Can be used as a Digital or analog sensor.
  • The Sensitivity of Digital pin can be varied using the potentiometer.
  • These gas sensors have a long life and low cost.
  • It has a Simple drive circuit.

MQ-2 Gas Sensor Module 

The MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module is useful for gas leakage detection (home and industry). It is suitable for detecting H2, LPG, CH4, CO, Alcohol, Smoke, or Propane. Due to its high sensitivity and fast response time, measurements can be taken as soon as possible. The sensitivity of the sensor can be adjusted by the potentiometer

MQ-2 gas sensor using gas-sensitive material is to be clean air in the lower conductivity of tin oxide (SnO2). When the sensor when flammable gases are present in the environment in which the conductivity of the sensor with an increasing concentration of combustible gas in the air increases.

Use a simple circuit to convert the changes in conductivity and output signal that corresponds to the concentration of the gas. MQ-2 gas sensor's higher sensitivity to liquefied petroleum gas, propane, hydrogen, detection of gas, and other combustible vapours are ideal. This sensor can detect a variety of flammable gas, and is a low-cost sensor for many applications.

Check out the entire range of Gas Sensors.


  • Safety of home
  • Control of air quality
  • Measurement of gas level

Package Includes:

  • 25 x MQ2 Gas Sensor Module

MQ2 Gas Sensor Specifications

Model  MQ2 Gas Sensor 
Operating Voltage  5V (DC)
Analog Output Voltage 0V to 5V
Digital Output Voltage 0V or 5V (TTL Logic)
Dimensions  3.6 x 2 x 1 cms
Weight  5 grams

Shipping & Returns

  • All orders confirmed before 3 pm IST are shipped on the
    same day, barring rare pickup delays on holidays or disturbances
  • Delivery time in Metro cities is 1-3 days, Others it is
    3-7 days. It varies based on location, reliant on courier services
  • Return window: 7 days from receipt unless stated
    otherwise. No refunds/replacements after
  • Returns only for non-working/damaged products are accepted
  • Initiate return requests to our customer service team via Support ticket or contact us at +91-8123057137
  • Refunds are processed within 3-4 working days post inspection and approval.

For more details, please check our Shipping and Return Policy

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1. What are gas sensors? How do they work?

  • Gas sensors (also known as gas detectors) are electronic devices that detect and identify different types of gasses. They are commonly used to detect toxic or explosive gasses and measure gas concentration. Gas sensor detect the presence or concentration of gases in the atmosphere. Based on the concentration of the gas the sensor produces a corresponding potential difference by changing the resistance of the material inside the sensor, which can be measured as output voltage. Based on this voltage value the type and concentration of the gas can be estimated.

2. How to adjust the sensitivity of MQ-2 gas sensor?

  • In order to adjust the sensitivity of this sensor for the particular type of gas, you need to keep this sensor in the particular gas type you want to detect. Now we have to rotate the potentiometer on the sensor.
  • Rotate it till the Red LED on the sensor gets ON. If we have to increase the sensitivity, rotate it clockwise, and if we have to decrease the sensitivity we have to rotate it anticlockwise.
  • When we are rotating this potentiometer basically we are adjusting the threshold value of the sensor. The comparator on this board is constantly checking the threshold value.
  • Once this threshold gets crossed the digital pin goes high and the LED will turn on. In this way calibrate your sensor, it may take some time but once you calibrate it, it will give you accurate readings.