MQ3 MQ-3 Alcohol Sensor Module Arduino Compatible

Power requirements: 5 VDC @ ~165 mA (heater on) / ~60 mA (heater off)
Current Consumption: 150mA
DO output: TTL digital 0 and 1 ( 0.1 and 5V)
AO output: 0.1- 0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V
Detecting Concentration: 0.05-10mg/L Alcohol
Interface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR)
Heater consumption: less than 750mW
Operating temperature: 14 to 122 °F (-10 to 50°C)
Load resistance: 200kΩ
Sensitivity S: Rs(in air)/Rs(0.4mg/L Alcohol)≥5
Sensing Resistance Rs: 2KΩ-20KΩ(in 0.4mg/l alcohol)

Product details

MQ-3 module is suitable for detecting Alcohol, Benzine, CH₄, Hexane, LPG, CO. Sensitive material of MQ-3 gas sensor is SnO₂, 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. MQ-3 gas sensor has high sensitivity to Alcohol, and has good resistance to disturb of gasoline, smoke and vapor.

This sensor provides an analog resistive output based on alcohol concentration. When the alcohol gas exist, the sensor’s conductivity gets higher along with the gas concentration rising.