Dust Sensor

A dust sensor is an electronic device designed to measure the concentration of particulate matter (PM) or dust in the air. It detects tiny airborne particles, such as smoke, pollen, and dust, using optical or laser-based technology.

Key Components:

1. Light Source: Often an infrared LED or a laser.
2. Detector: A photodiode or light sensor to detect scattered light from particles.
3. Airflow Mechanism: Some sensors have fans to draw air into the detection chamber.

Working Principle:

• The sensor shines a light beam into the air.
• When particles pass through, they scatter the light.
• The scattered light is captured by the detector, which then calculates the particle concentration.

Applications:

• Air purifiers
• HVAC systems
• Environmental monitoring
• Industrial safety

Simple and cost-effective models include the Sharp GP2Y1010AU0F, while more advanced ones include laser dust sensors like the SDS011 for higher accuracy.