MQ-3 Alcohol Detector Gas Sensor Module
MQ-3 Alcohol Detector Gas Sensor Module
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Looking to buy MQ-3 Alcohol Detector Gas Sensor Module at the best price in India? Tech Depot India offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.
Detect alcohol vapors and ethanol concentrations with the MQ-3 Gas Sensor Module - a reliable and affordable solution for breathalyzer projects, safety systems, and air quality monitoring. Available at Tech Depot India, Bengaluru, with fast shipping and full technical support.
Specifications
| Sensor Type | MQ-3 Semiconductor Gas Sensor (SnO2) |
| Target Gas | Alcohol (Ethanol), with sensitivity to benzine, methane, LPG, and hexane |
| Detection Range | 0.04 mg/L - 4 mg/L Alcohol Concentration |
| Operating Voltage | 5V DC |
| Heater Voltage | 5V AC/DC |
| Heater Power Consumption | <= 750 mW |
| Output Type | Analog (A0) and Digital (D0) |
| Digital Output | TTL level with onboard comparator and adjustable potentiometer |
| Preheat Time | ~20 seconds (recommended 24-48 hours for first use calibration) |
| Sensitivity Adjustment | Onboard trimmer potentiometer for digital threshold tuning |
| Indicator LEDs | Power LED and Digital Output Trigger LED |
| Operating Temperature | -10 degreesC to 50 degreesC |
| Operating Humidity | <= 95% RH (non-condensing) |
| Board Dimensions | ~32 mm x 20 mm (compact breakout module) |
| Mounting | M3 mounting hole for secure installation |
| Interface Pins | VCC, GND, A0 (Analog Out), D0 (Digital Out) |
| Compatible Platforms | Arduino, ESP32, ESP8266, Raspberry Pi (with ADC), STM32, PIC |
| Origin | Original/Authentic MQ-3 Sensor Element |
Why Choose MQ-3 Alcohol Detector Gas Sensor Module?
100% Authentic
GST Invoice - A GST invoice is included with every order.
Expert Support - Dedicated technical help on WhatsApp and email.
Pan-India Delivery - Shipped across Bengaluru, Delhi NCR, Hyderabad and all of India.
Trusted by Makers - Used by students, hobbyists and professionals nationwide.
Key Features of MQ-3 Alcohol Detector Gas Sensor Module
- High Sensitivity to Alcohol Vapors: The MQ-3 uses a tin dioxide (SnO2) sensing element that exhibits a significant change in conductivity when exposed to alcohol, providing reliable detection even at low concentrations.
- Dual Output Modes: Analog output (A0) delivers a variable voltage proportional to gas concentration for precise readings, while the digital output (D0) provides a simple HIGH/LOW trigger based on the adjustable threshold - ideal for alarm-based systems.
- Onboard Potentiometer: Fine-tune the digital trigger threshold without any external components, allowing quick calibration for different sensitivity requirements and environments.
- Fast Response & Recovery: Rapid detection response time with quick recovery, making it suitable for real-time monitoring and repeated measurements.
- Wide Detection Range: Covers alcohol concentrations from 0.04 mg/L to 4 mg/L, suitable for everything from trace detection to high-concentration environments.
- Compact Breakout Board: The sensor comes pre-soldered on a convenient PCB module with clearly labeled pins, indicator LEDs, and a mounting hole for easy integration into projects and enclosures.
- Universal Microcontroller Compatibility: Works seamlessly with Arduino Uno/Nano/Mega, ESP32, ESP8266, Raspberry Pi (via external ADC like MCP3008), STM32, and virtually any 5V-compatible microcontroller platform.
- Low Cost, High Value: An extremely affordable sensor module that delivers dependable performance for prototyping, education, and real-world safety applications.
- Comprehensive Documentation: We provide wiring diagrams, sample Arduino code, and calibration guidance to get you started immediately.
How It Works
The MQ-3 sensor module operates on the principle of chemiresistance. The core sensing element is a small bead of tin dioxide (SnO2)
Frequently Asked Questions
Is technical support available?
Yes, responsive support via email and WhatsApp for setup, troubleshooting, and application guidance.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Customer Support
Email: techdepotindia@gmail.com
WhatsApp: Available for setup and troubleshooting help
Order your MQ-3 Alcohol Detector Gas Sensor Module today and start building your next project.
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