MQ-3 Alcohol Sensor Module for Arduino Raspberry Pi, Alcohol Detection in Breath
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MQ-3 Alcohol Sensor Module – Arduino / Raspberry Pi
Upgrade your projects with the MQ-3 Alcohol Sensor Module designed for Arduino and Raspberry Pi. This module detects alcohol and ethanol during exhalation, offering precise monitoring capabilities. Operating at DC 5V, with a compact size of 35 × 20 × 16 mm, the sensor provides analog and digital outputs for seamless integration into embedded designs.
Typical Applications
- Breathalyzer projects — DIY alcohol detection in exhaled breath.
- Safety interlocks — preventing vehicle / machinery start if alcohol detected.
- Industrial alcohol monitoring — workplace safety alarms.
- Educational electronics — teaching gas sensing + threshold detection.
MQ-3 Specifications
| Feature | Specification |
|---|---|
| Rated Voltage | DC 5V |
| Detection Gas | Alcohol, Ethanol |
| Number of Pins | 4 |
| Pin Assignment | AO (Analog) + DO (Digital) + GND + VCC (5V) |
| Size | 35 × 20 × 16 mm |
| Compatibility | Arduino / Raspberry Pi / STM32 / ESP32 / generic MCU |
| Condition | Brand New |
FAQ — MQ-3 Alcohol Sensor
Q: Burn-in needed?
A: Yes — 24h initial burn-in for stability. After that, 1-3 min warm-up from cold start.
Q: Commercial breathalyzer use?
A: No — hobbyist / educational / indicative only. For legal / commercial breathalyzer, use certified BAC testers.
Q: Bulk pricing?
A: Yes — email contact@lys-sz.com with your volume.
Related products
- MQ-2 Multi-Gas Sensor Module
- MQ-7 CO Gas Sensor Module
- MQ-9 Flammable Gas Sensor Module
- MQ-8 Hydrogen Gas Sensor Module
OEMs / kit makers stocking MQ-3? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouses.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
