MQ-3 Alcohol Gas Sensor Module
WITH INDICATOR: Features a double-sided circuit board design, equipped with a power indicator and a TTL output indicator for easy monitoring.
GOOD SENSITIVITY: Provides both TTL switching (DO) output and analog (AO) output. It exhibits high sensitivity for detecting alcohol gas and other combustible gases.
OUTPUT: The TTL output is valid at low levels (when the output is low, the indicator light is on), allowing direct connection to a microcontroller (MCU) or relay module.
VOLTAGE: The analog output voltage increases with higher gas concentration, offering rapid response and recovery characteristics for effective gas detection.
EASY TO POSITION: Includes four screw holes, making installation and positioning simple and convenient.
€2,29
The MQ-3 gas sensor is designed to detect alcohol vapor with a sensitivity range of 0.04-4mg/L alcohol. It features both digital (DO) and analog (AO) outputs, with rapid response and recovery characteristics for precise alcohol concentration detection.
Features:
- Sensitivity Range: Detects alcohol vapor in the range of 0.04-4mg/L.
- Output Types: Digital TTL output (0.1V and 3.3V) and analog output (0.1V to 4V).
- Power Requirements: DC 5V input voltage and 150mA current consumption.
- Response Time: Requires 20 seconds warm-up for stable readings.
- Standard Test Conditions: 20±2°C, 65%±5% relative humidity, with a warm-up time of 48 hours.
Applications:
The MQ-3 sensor is commonly used in alcohol detection systems, breath analyzers, and safety devices where monitoring alcohol vapor is critical for safety or regulatory compliance.
Hardware Overview
| VCC | Positive power supply (5V) |
| GND | Negative power supply |
| DO | TTL switching signal output |
| AO | Analog signal output |
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