MQ-135 Air Quality Gas Sensor Module
🌿 MQ-135 Air Quality Gas Sensor Module – Comprehensive Overview
The MQ-135 is a versatile and cost-effective gas sensor module designed to detect a wide range of harmful gases, making it an excellent choice for air quality monitoring systems, smart home applications, and environmental sensing projects. This sensor is particularly sensitive to ammonia (NH₃), benzene (C₆H₆), alcohol, smoke, and carbon dioxide (CO₂), among other volatile organic compounds (VOCs).
🔍 Key Features
- Wide Detection Range: Capable of detecting gases such as ammonia, benzene, alcohol, smoke, and CO₂.
- Dual Output: Provides both analog and digital outputs for flexible integration.
- Adjustable Sensitivity: Features a built-in potentiometer to fine-tune the sensor's sensitivity.
- Preheating Requirement: Requires a warm-up time of approximately 20 seconds upon power-up for accurate readings.
- Low Power Consumption: Operates at 5V with a current consumption of around 150mA.
- Long Lifespan: Designed for extended use with proper calibration.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Operating Voltage | 5V DC |
| Power Consumption | ~150mA |
| Preheating Time | ~20 seconds |
| Analog Output Range | 0V to 5V |
| Digital Output | TTL logic level (0V or 5V) |
| Sensitivity Adjustment | Built-in potentiometer |
| Response Time | Fast response with high sensitivity |
🛠️ Applications
- Air Quality Monitoring Systems: Ideal for detecting pollutants in indoor and outdoor environments.
- Smart Home Automation: Integrate with IoT platforms for real-time air quality monitoring.
- Industrial Safety: Monitor hazardous gas levels in industrial settings.
- Environmental Research: Collect data for environmental studies and pollution tracking.
🔌 Wiring Guide for Arduino Integration
- VCC → 5V (Arduino)
- GND → GND (Arduino)
- A0 (Analog Output) → A0 (Arduino)
- D0 (Digital Output) → Digital Pin (e.g., D2 on Arduino)