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MQ-3 Alcohol Gas Sensor Module – KSH 600 at HIMA TRONICS Mombasa – Top quality sensors. Best electronics in Kenya. Shop now for Arduino, ESP32, sensors and IoT devices.
MQ-3 Alcohol Gas Sensor Module – KSH 600 at HIMA TRONICS Mombasa – Top quality sensors. Best electronics in Kenya. Shop now for Arduino, ESP32, sensors and IoT devices. - View 2
MQ-3 Alcohol Gas Sensor Module – KSH 600 at HIMA TRONICS Mombasa – Top quality sensors. Best electronics in Kenya. Shop now for Arduino, ESP32, sensors and IoT devices. - View 3
Home / Sensors / MQ-3 Alcohol Gas Sensor Module

MQ-3 Alcohol Gas Sensor Module

SKU: HMJ047 Category: Sensors
KSH 600.00
In Stock
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Product Description

MQ-3 Alcohol Gas Sensor Module

= High-Sensitivity Alcohol Vapor Detector for Arduino Projects =

The MQ3 gas sensor module is a costeffective, semiconductor-based sensor designed to detect alcohol vapors in the air. It's the ideal component for building breathalyzers, car alcohol alarms, and portable gas detectors .

Reliable Alcohol Detection High sensitivity to alcohol with detection range of 25500 ppm and fast response time .
Dual Output Modes - Provides both analog (AO) and digital (DO) signals for flexible integration.
Operating voltage is 5V DC (module), 2.5V to 5.0V .
The sensor's analog output voltage increases with the concentration of alcohol vapor.
For Arduino projects, the sensor typically requires a 20second warmup period for stable readings .
This sensor is sensitive to alcohol vapor; it may require recalibration for the specific environment and may have small sensitivity to benzene .

= Technical Specifications =

ParameterValue
Target GasAlcohol, Ethanol
Detection Range0.05 10 mg/L or 25 500 ppm
Operating Voltage5V DC (module)
Heater Consumption<900mW
Response Time≤10s (70% response)

= Key Features =

+High Sensitivity and Selectivity - Excellent response to alcohol, with quick response and recovery time .

+Simple Interface Standard 4pin header (VCC, GND, DO, AO) for easy connection.

+Adjustable Sensitivity - Onboard potentiometer for setting the digital output threshold.

+Low Cost A budgetfriendly solution for alcohol detection projects.

== Applications ==

  1. Breathalyzer and personal alcohol detector projects .
  2. Car alcohol ignition interlock systems (for vehicle safety) .
  3. Portable gas detectors and safety devices .
  4. DIY electronics and IoT projects requiring vapor detection.
Versatile Safety Component - Widely used with Arduino for breathalyzer and safety systems .
Easy Arduino Integration - Simple analog output reading via an analog pin .

√ Includes mounting holes for secure installation.

√ Compatible with Arduino, ESP32, and Raspberry Pi.

√ Provides both analog and digital output options.

= Troubleshooting =

Slow response or inaccurate readings:

  • Ensure a sufficient warm-up period (20 seconds to 48 hours for calibration) .
  • Adjust the sensitivity potentiometer.

No output:

  • Check the 5V power supply.
  • Verify the wiring connections.