MQ-135 Air Quality & Harmful Gas Sensor Module
Monitor the air you breathe with the versatile MQ-135 Air Quality Sensor Module. This sensor is designed to detect a wide range of harmful gases and is an excellent choice for building indoor or outdoor air quality monitoring systems, pollution detectors, and environmental sensing projects.
The MQ-135 is sensitive to various pollutants, including Ammonia (NH3), sulfide, benzene vapor, smoke, and CO2. While not a precision instrument for specific gas measurement, it provides a reliable indication of the overall air quality. This breakout board makes it easy to use, featuring a dual-output system for maximum flexibility. The **Analog Output (A0)** provides a real-time voltage reading that corresponds to the general pollution level, while the **Digital Output (D0)** acts as an alarm, triggering when the air quality drops below a user-defined threshold.
This trigger point can be precisely calibrated using the onboard potentiometer. For any project focused on environmental awareness and monitoring, the MQ-135 is a valuable and cost-effective tool.
Key Features:
- Sensor Model: MQ-135
- Primary Detection: General air quality, Ammonia (NH3), Benzene, Sulfide, Smoke, CO2
- Dual Output: Provides both Analog (voltage) and Digital (HIGH/LOW) signals
- Adjustable Sensitivity: Onboard potentiometer to configure the digital alarm threshold
- Operating Voltage: 5V DC
- Interface: 4-pin header (VCC, GND, D0, A0) for simple connection
- Wide Detection Scope: A great all-around sensor for pollution monitoring
Applications:
The MQ-135 sensor is ideal for creating a variety of environmental projects, including indoor/outdoor air quality monitors, office or factory pollution detectors, smoke detectors, and educational experiments for Arduino and other microcontrollers.
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