Optical Dust Sensor with Cable
Optical Dust Sensor (with Cable)
Overview
The Optical Dust Sensor is a sensor used to measure dust concentration in air using light scattering.
Commonly used in:
Air quality monitoring
Smart home systems
Industrial pollution detection
IoT environmental projects
Working Principle
The sensor works on light scattering:
Inside IR LED + photodiode
Dust particles pass through sensing chamber
Light hits particles scatters
Photodiode detects scattered light generates voltage
Based on Light Scattering
More dust more scattered light hi OPTICAL DUST SENSOR Detects: Dust particles Voltage: 5V Output: Analog Range: PM2.5 / PM10 Method: Light scattering Response: Real-time
Pin Configuration (Typical with Cable)
Dust Sensor VCC 5V GND Ground Vo Analog Output LED Control Pin
Some models include extra control pins for LED timing
Key Specifications
Operating Voltage: 5V DC
Output: Analog voltage
Detectable Particles: PM2.5, PM10
Response Time: Fast (ms range)
Low power consumption
Comes with cable for easy connection
Key Features
Detects fine dust particles
Real-time air quality monitoring
Easy to interface
Compact and lightweight
Low power usage
Applications
Air pollution monitoring
Smart air purifiers
Industrial safety systems
Vehicle cabin air monitoring
IoT environmental stations
Read analog output and convert to dust density
Working Example
Air Quality Monitor:
Dust enters sensor
Light scatters
Voltage output changes
Microcontroller calculates dust level
Display air quality
Important Notes
Needs calibration for accurate PM values
Sensitive to humidity and airflow
Requires proper sampling timing
Fan/airflow improves accuracy
Optical Dust Sensor vs Gas Sensor
Feature | Dust Sensor | Gas Sensor |
Detects | Particles (PM) | Gases |
Output | Analog | Analog/Digital |
Use Case | Air quality |
Pro Tip
Use a fan or airflow channel for better readings
Combine with temperature & humidity sensor for accuracy
Ideal for building a DIY air quality monitoring sys