MQ-3 alcohol content sensor module

MQ-3 alcohol concentration sensor module used to detect alcohol concentration in the environment, breathing. High-sensitivity sensor with fast response, sensitivity adjustable by rheostat. The sensor provides an analog output based on the alcohol content.  MQ-3 alcohol concentration sensor module can detect gas, alcohol, and ethanol.

SPECIFICATIONS:

• Dimensions: 32 x 22 x 27 mm
• Main chip: LM393, MQ-3 gas sensor.
• Supply voltage: DC 5V.
• There are 2 types of analog and TTL output signals.
• TTL output signal is of low value. (Low level signal output can be connected directly to the microcontroller).
• Analog output 0 ~ 5V, the higher the alcohol content, the higher the voltage.
• High sensitivity and good selectivity with ethanol vapors.
• Durable and reliable stability.
• Sensitive and fast recovery.

Pinout:

Instruction for using MQ-3 sensor with Arduino:

Connection:

Code for MQ-3 sensor:

void setup() 
{
  Serial.begin(9600);
}
 
void loop() 
{
  
  Serial.println(analogRead(A0));
  delay(1000);
}