MQ3 Alcohol Sensor Module

The MQ-3 alcohol sensor is suitable for detecting alcohol or ethanol concentration in your breath, just like a normal breathalyzer. It has high sensitivity and fast response time. The sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor.

SKU: 40

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Description

Features of MQ-3 Alcohol Sensor

Sensor Type – Semiconductor
Easy SIP header interface
Compatible with most of the microcontrollers
Low-power standby mode
Requires heater voltage
Good sensitivity to alcohol gas
Fast response and High sensitivity
Long life and low cost
Requires simple Drive circuit

Specifications of MQ-3 Gas Sensor

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)
Dimensions: 32 x 22 x 16 mm