DIYables MQ3 Alcohol Gas Sensor Module for Ethanol Vapor Detection, High Sensitivity Analog and Digital Output for Arduino ESP32 Raspberry Pi DIY Projects, 2 Pack
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Quick Overview
The DIYables MQ3 Alcohol Gas Sensor Module is a high-sensitivity ethanol vapor detector designed for accurate alcohol measurement in DIY electronics projects. This sensor module detects approximately 0.05 to 10 mg/L alcohol levels and responds to benzene, hexane, and other VOC gases. Compatible with Arduino, ESP32, ESP8266, and Raspberry Pi platforms, it provides both analog voltage output and digital TTL output for flexible integration with microcontrollers.
This 2-pack module features a semiconductor sensing element with fast response and recovery times. The built-in potentiometer allows easy threshold calibration for customized sensitivity settings. Operating at 5V DC with low power consumption, the module includes a protective coating for durability in long-term applications. The dual output options make it versatile for various detection and monitoring projects.
Ideal for breathalyzer projects, safety monitoring systems, air quality detection, and alcohol vapor measurement applications. Perfect for makers, students, and professionals working with Arduino, ESP32, ESP8266, Raspberry Pi, and other microcontroller platforms for gas detection and environmental monitoring projects.
Key Features
- High Sensitivity Alcohol Detection — Designed for accurate ethanol vapor measurement, ideal for breathalyzer projects, safety monitoring and DIY electronics
- Wide Detection Range — Detects approximately 0.05 to 10 mg/L alcohol levels and responds to benzene, hexane and other VOC gases
- Dual Output Options — Provides analog voltage output and digital TTL output for flexible use with Arduino boards, ESP32, ESP8266, Raspberry Pi and other microcontrollers
- Adjustable Sensitivity — Built-in potentiometer allows easy threshold calibration for customized detection levels
- Stable and Reliable Performance — Features semiconductor sensing element with fast response and recovery times plus protective coating for durability in long-term applications
- Low Power Operation — Operates at 5V DC with low power consumption for energy-efficient projects
- Quick Response Time — Fast detection and recovery enables real-time monitoring applications
- Multi-Gas Detection — Responds to ethanol, benzene, hexane, and other volatile organic compounds
- LED Indicators — Onboard LEDs for power and digital output status indication
- Wide Compatibility — Works with Arduino, ESP32, ESP8266, Raspberry Pi, and other 5V microcontrollers
- Tutorial Support — Comprehensive tutorials for Arduino, ESP32, ESP8266, and Raspberry Pi
- Versatile Applications — Perfect for breathalyzers, safety alarms, air quality monitoring, alcohol detection systems, and VOC measurement
- ...NOTE
- If you are using the ESP32, you need to configure the ADC with 11 dB attenuation to set the voltage reference range to handle up to 3.3V.
- ...NOTE
SPECIFICATION
| Specification | Value |
|---|---|
| Product Type | Alcohol Gas Sensor Module |
| Model/Chip | MQ3 Semiconductor Sensor |
| Detection Gas | Ethanol vapor (alcohol), benzene, hexane, VOC |
| Detection Range | 0.05 to 10 mg/L (alcohol concentration) |
| Sensitivity | Adjustable via onboard potentiometer |
| Operating Voltage | 5 V DC (required for heater element) |
| Heater Voltage | 5 V DC |
| Power Consumption | Low power operation |
| Interface | Analog and Digital |
| Output Type | Analog voltage output and Digital TTL output |
| Output Logic Level | Compatible with 3.3V and 5V logic |
| Response Time | Fast response and recovery |
| Sensing Element | Tin dioxide (SnO2) semiconductor |
| Protection | Protective coating for durability |
| LED Indicators | Power LED and Digital Output LED |
| Dimensions | 32mm x 20mm (approx.) |
| Package Quantity | 2 pieces |
| Compatibility | Arduino, ESP32, ESP8266, Raspberry Pi, Arduino Nano ESP32, Arduino Uno R4, and other microcontrollers (requires 5V power supply, signal compatible with 3.3V logic) |
| Applications | Breathalyzer projects, safety monitoring, alcohol detection, air quality monitoring, VOC detection, gas leak detection, DIY electronics |
PACKAGE
A package includes:
| Qty | Items |
|---|---|
| 2 | MQ3 Alcohol Gas Sensor Modules |
Tutorials
- Arduino - Alcohol Sensor MQ3 tutorial
- Arduino Uno R4 - Alcohol Sensor MQ3 tutorial
- Arduino Nano - Alcohol Sensor MQ3 tutorial
- Arduino Nano ESP32 - Alcohol Sensor MQ3 tutorial
- ESP32 - Alcohol Sensor MQ3 tutorial
- ESP32 MicroPython - Alcohol Sensor MQ3 tutorial
- ESP8266 - Alcohol Sensor MQ3 tutorial
- Raspberry Pi - Alcohol Sensor MQ3 tutorial
- Raspberry Pi Pico - Alcohol Sensor MQ3 tutorial
COMPATIBLE HARDWARE
- Arduino boards (UNO, Mega, Nano, etc.) — Analog pin for analog output, digital pin for digital output, 5V power
- Arduino Uno R4 WiFi/Minima — Direct connection with 5V compatibility
- ESP32 development boards — Use 11dB ADC attenuation for analog reading, digital output compatible
- ESP8266 boards (NodeMCU, Wemos D1, etc.) — Analog input (A0) for analog output, digital pin for digital output
- Raspberry Pi (all models) — ADC required for analog output (MCP3008), GPIO for digital output
- Raspberry Pi Pico — Built-in ADC for analog reading, GPIO for digital output
- Arduino Nano ESP32 — Analog and digital pins with 5V tolerance
- Any microcontroller with analog input — 5V power supply and ADC capability for analog output
- Breathalyzer systems — Alcohol detection and measurement applications
- Safety monitoring devices — Gas leak detection and alarm systems