Alcohol Gas Sensor (MQ-3) + Carrier board

Sensitive material of MQ3 gas sensor is SnO2, which with lower conductivity in clean air. When the target alcohol gas exist, The sensor’s  conductivity is more higher along with the gas concentration rising. MQ3 gas sensor has high sensitity to Alcohol, and has good resistance to disturb of gasoline, smoke and vapor. The sensor could be used to detect alcohol with different concentration, it is with low cost and suitable for different application.

0J2254

The MQ-3 semiconductor gas sensor detects the presence of alcohol gas at concentrations from 0.04 mg/L to 4 mg/L, a range suitable for making a breathalyser. The sensor’s simple analog voltage interface requires only one analog input pin from your microcontroller. This alcohol gas sensor detects the concentration of alcohol gas in the air and ouputs its reading as an analog voltage. The concentration sensing range of 0.04 mg/L to 4 mg/L is suitable for breathalysers (the legal limit of breath alcohol concentration, or BrAC, in most US states is 0.08 grams per 210 liters, or 0.38 mg/L). The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V. Please read the MQ3 datasheet for more information about the sensor.

NOTE: The MQ-3 is heater-driven so be aware that the sensor will become warm and may even emit a smell at first. This is completely normal.

Quick Spec

  • Detects the presence of alcohol gas at concentrations from 0.04 mg/L to 4 mg/L
  • MQ-3 sensor can operate at temperatures from -10 to 50°C
  • Consumes less than 150 mA at 5 V.

Resources

Sample Code



int mq3_analogPin = A0; // connected to the output pin of MQ3 

void setup(){
  Serial.begin(9600); // open serial at 9600 bps
}

void loop()
{
  // give ample warmup time for readings to stabilize

  int mq3_value = analogRead(mq3_analogPin);
  Serial.println(mq3_value);

  delay(100); //Just here to slow down the output.
}


Shipping List

  • 1 x MQ-3 Alcohol Sensor
  • 1 x Pololu Carrier Board


Alcohol Gas Sensor (MQ-3) + Carrier Board

  • Brand: Pololu Electronics
  • Product Code: 1634
  • Stock

    Warehouse Stock Status Location
    Centurion In Stock D84
    Stellenbosch In Stock A0251
  • R110.00 (Inc Tax: R126.50)


  • 5 or more R95.00

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