Experiment 1 - Alcohol detector

Experiment 1 - Alcohol detector

* Objective

To determine the level of Alcohol in any liquid.

* Application

This sensor has a good level of sensitivity it can be used as a portable alcohol detector.

* Procedure

MQ303A is a semiconductor sensor for Alcohol detection. It has very good sensitivity and fast response to alcohol, suitable for portable alcohol detector just plugging with sensything. Below you find the conversion of ADC data to the content of alcohol to be detected with milligram per litre. When the content of alcohol is more than 0.8 it detects the presence of alcohol.

* Excerpts from the code:

float adc_data = (float)((bit32*VFSR*1000)/FSR);     //In  mV
float v = (adc_data/10) * (5.0/1024.0);
float mgL = 0.67 * v;

if(mgL > 0.8)
{   
	Serial.print("mg/L : %f \n");
	Serial.print(" Alcohol Detected");
	Serial.println(mgL);
 }
else
{    
	Serial.print("mg/L : %f \n");
	Serial.print(" Alcohol Not Detected");
	Serial.println(mgL);
}  

* Pin mapping and connection instructions:

Download the Alcohol Sensor code