Winsen MQ-2- Smoke Sensor

SKU: 938342
In Stock


  1. Operating Voltage is +5V
  2. Can be used to Measure or detect LPG, Alcohol, Propane, Hydrogen, CO, and even methane
  3. Can be used as a digital or analog sensor
  4. Long life and low cost
  5. Simple drive circuit
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Winsen MQ-2 Smoke Sensor is an original and brand new smoke and propane gas sensor. With a long lifespan and low price, for domestic gas leakage and flammable gas alarm use.

The sensitive material of the MQ-2 gas sensor is SnO2, which with lower conductivity in clean air. When the target flammable gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.

MQ-2 gas sensor has a high sensitivity to propane and smoke, also can detect natural gas and other flammable steam well. It is at low cost and suitable for different applications of detecting kinds of flammable gases.

Applications :

It is widely used in domestic gas leakage alarms, industrial flammable gas alarms, and portable gas detectors.


  1. Responsive to a wide range of gases
  2. Compatible with 5V
  3. Cost-efficient

Package Includes:

1 x Winsen MQ-2- Smoke Sensor

Additional information

Model Type


Sensor Type


Standard Encapsulation

Bakelite, Metal cap

Target Gas

Flammable gas, smoke gas sensor

Detecting Range

300~10000ppm(flammable gas)

Loop Voltage (Vc)

≤24V DC

Heater Voltage (VH)

5.0V±0.1V AC or DC

Tem. Humidity:

20+/-2C, 55%+/-5%RH

Output Voltage

2.5V~4.0V(in 2000ppmC3H8)

Load Resistance


Heater Resistance

29Ω±3Ω(room tem.)


Ro(in air)/Rs(2000ppm C3H8)>5

Length (mm)


Diameter (mm)


Weight (gm)