MQ-3 Alcohol Gas Sensor Module
₵30.00
This module uses the MQ-3 Alcohol Gas Sensor, an affordable semiconductor sensor that detects alcohol gases in concentrations from 0.05 mg/L to 10 mg/L. It features SnO2 as the sensitive material, which increases its conductivity as alcohol concentration rises.
The MQ-3 sensor is highly sensitive to alcohol and resistant to smoke, vapor, and gasoline interference. It provides both digital and analog outputs, with an adjustable digital output threshold. The module is easy to interface with microcontrollers, Arduino boards, Raspberry Pi, and more.
12 in stock (can be backordered)
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Features
- High sensitivity to alcohol vapors.
- Detects alcohol concentrations ranging from 0.05 to 10mg/L.
- Provides both analog and digital output signals.
- Fast response and recovery times for timely detection.
- Simple drive circuit for easy implementation.
- Long service life with stable performance.
- Adjustable sensitivity via onboard potentiometer.
- Compact design suitable for various applications.
Specifications
| Parameter | Value |
|---|---|
| Sensor Type | Semiconductor (SnO₂) |
| Target Gas | Alcohol vapor |
| Detection Range | 0.05–10mg/L |
| Operating Voltage | 5VDC |
| Heater Voltage (VH) | 5.0V±0.1V AC or DC |
| Load Resistance (RL) | Adjustable |
| Heater Resistance (RH) | 31Ω±3Ω (Room Temp) |
| Heater Consumption | ≤900mW |
| Sensitivity (S) | Rs(in air)/Rs(0.4mg/L alcohol) ≥5 |
| Preheat Time | ≥24 hours |
| Operating Temperature | -10°C to 50°C |
| Operating Humidity | ≤95% RH |
| Dimensions | 35mm x 22mm x 30mm |
PINOUT
- VCC – Input Power Supply
- GND – Supply Ground
- DO – Digital Output
- AO – Analog Output
Applications
- Breathalyzer devices for personal or professional use.
- Alcohol detection systems in vehicles.
- Industrial safety equipment for monitoring alcohol vapors.
- Integration into microcontroller-based projects for alcohol monitoring.
- Educational projects and laboratory experiments involving gas detection.
Package Contents
- 1x MQ-3 Alcohol Gas Sensor Module.
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