Description

The MQ3 Gas Sensor is a highly sensitive module designed to detect alcohol vapours in the air. It uses a low conductivity tin oxide (SnO2) material in clean air, and as the alcohol concentration increases, the sensor's conductivity increases, providing an output signal. This sensor is highly sensitive to alcohol and is resistant to interference from gasoline, smoke, and water vapour. It is a cost-effective solution for applications requiring alcohol detection, such as vehicle driver testing, workplace monitoring, and other ethanol vapour detection applications.

Why Choose the MQ3 Gas Sensor?

The MQ3 Gas Sensor provides reliable alcohol detection with a wide detection range of 10-1000ppm. It is designed to be highly responsive, providing both analog and digital output signals, making it easy to integrate into various systems. The sensor offers a long lifespan and rapid response and recovery times, ensuring consistent and accurate readings in a wide range of conditions. It also features a dual-panel design, which includes power and signal indicators, making it user-friendly for integration and use in real-time monitoring systems.

Key Features

High Sensitivity: Detects alcohol vapour reliably.
Dual Output: Provides both analog (AO) and TTL (DO) digital signals.
Wide Detection Range: Alcohol detection range from 10ppm to 1000ppm.
Easy Integration: TTL signal output can be directly connected to microcontroller or relay modules.
Rapid Response: Quick response time and recovery characteristics.
Durable Design: Long lifespan and stable performance.
Indicator Lights: Power and signal indicators for easy monitoring.

Technical Specifications

Input Voltage: DC 5V
Power Consumption: 150mA
DO Output: TTL digital 0 and 1 (0.1 and 5V)
AO Output: 0.1V to 4V (depending on alcohol concentration)
Operating Temperature: -20°C to +50°C
Response Time: Approximately 20 seconds to warm up
Mounting: Four screw holes for easy positioning

With its high sensitivity, dual output signals, and reliable performance, the MQ3 Gas Sensor is an excellent choice for alcohol detection in a variety of applications, including safety monitoring and vehicle driver testing. Its robust design and ease of use make it an invaluable tool for both professionals and hobbyists alike.