MQ-3 – Hamtech Electronics Technologies https://hamtechtechnologies.com Sun, 30 Nov 2025 16:46:54 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.2 https://hamtechtechnologies.com/wp-content/uploads/2025/11/h-100x100.webp MQ-3 – Hamtech Electronics Technologies https://hamtechtechnologies.com 32 32 MQ-3 Alcohol Sensor https://hamtechtechnologies.com/product/mq-3-alcohol-sensor/ https://hamtechtechnologies.com/product/mq-3-alcohol-sensor/#respond Thu, 20 Nov 2025 19:51:29 +0000 https://hamtechtechnologies.com/index.php/product/mq-3-alcohol-sensor/ The MQ-3 Alcohol Sensor is designed to sense alcohol vapors with high sensitivity and stability. It is commonly used in breathalyzer projects, vehicle alcohol detection systems, and indoor alcohol monitoring applications.
The sensor provides both analog and digital outputs and includes an onboard potentiometer to customize the digital detection threshold.
It is easy to interface with microcontrollers such as Arduino, ESP32, and Raspberry Pi (via an ADC for analog input). The MQ-3 offers fast response time and a wide detection range, making it suitable for real-time alcohol detection and safety systems.

Key Features

  • Detects alcohol vapors (ethanol)

  • High sensitivity and fast response

  • Analog and digital output modes

  • Adjustable sensitivity through onboard potentiometer

  • Built-in LED indicator for digital alerts

  • Reliable and long-lasting sensing element

  • Compatible with Arduino, ESP32, Raspberry Pi

Specifications

Feature Details
Operating Voltage 5V DC
Detection Range 10–1000 ppm alcohol (ethanol)
Output Analog voltage, Digital HIGH/LOW
Sensitivity High to ethanol vapor
Preheat Time 24–48 hours (first use)
Current Consumption ≤150 mA
Operating Temperature -10°C to 50°C
Dimensions 32 × 20 × 22 mm

Applications

  • DIY breathalyzer devices

  • Alcohol detection in vehicles (driver safety systems)

  • Workplace safety monitoring

  • Indoor air quality systems involving alcohol vapor detection

  • IoT-based ethanol/alcohol monitoring

  • Academic and research projects involving gas sensing

Compatible Boards / Circuits

  • Arduino (Uno, Nano, Mega)

  • ESP32 / ESP8266

  • Raspberry Pi (via ADC such as ADS1115)

  • Displays, alarms, and IoT dashboards

]]> https://hamtechtechnologies.com/product/mq-3-alcohol-sensor/feed/ 0