MQ-3 Alcohol Detector Gas Sensor Module
MQ-3 Alcohol Detector Gas Sensor Module
MQ-3 Alcohol Detector Gas Sensor Module
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 The Tech Depot, 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 |
| Warranty | 7-day warranty on manufacturing defects |
| Support | Email & WhatsApp 24/7 Technical Assistance |
Key Features
- 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.
Why Choose the MQ-3 from The Tech Depot?
- 100% Authentic Sensor: Genuine MQ-3 sensing element sourced from authorized distributors - no clones or substandard imitations.
- Tested & Quality Checked: Every module undergoes inspection before dispatch to ensure proper heater function and sensor response.
- 1-5 days shipping: Fast delivery across India from our Bengaluru warehouse. Same-day dispatch available for orders placed before 2 PM.
- Expert Technical Support: Get help with wiring, code, calibration, and troubleshooting from our engineering team via email and WhatsApp - available 24/7.
- Comprehensive Documentation: We provide wiring diagrams, sample Arduino code, and calibration guidance to get you started immediately.
- Trusted by Engineers & Students: Thousands of makers, students, and professionals across India rely on The Tech Depot for quality components.
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
When will I receive my order?
Products ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.
Is technical support available?
Yes, 24/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.
What is your return policy?
7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Buy MQ-3 Alcohol Detector Gas Sensor Module Online in India
Purchase the MQ-3 Alcohol Detector Gas Sensor Module online at The Tech Depot - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on MQ-3 Alcohol Detector Gas Sensor Module with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy MQ-3 Alcohol Detector Gas Sensor Module at the best price in India? The Tech Depot 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.