Optical Dust Sensor with Cable
π«οΈ Optical Dust Sensor (with Cable)
π Overview
The Optical Dust Sensor is a sensor used to measure dust concentration in air using light scattering.
π Commonly used in:
π¬οΈ Air quality monitoring
π Smart home systems
π Industrial pollution detection
π€ IoT environmental projects
π§ Working Principle
The sensor works on light scattering:
Inside β IR LED + photodiode
Dust particles pass through sensing chamber
Light hits particles β scatters
Photodiode detects scattered light β generates voltage
π Based on Light Scattering
β More dust β more scattered light β higher output signal
π Infographic Summary
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β π«οΈ OPTICAL DUST SENSOR β
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β π― Detects: Dust particles β
β β‘ Voltage: 5V β
β π Output: Analog β
β π Range: PM2.5 / PM10 β
β π‘ Method: Light scattering β
β π Response: Real-time β
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π Pin Configuration (Typical with Cable)
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β Dust Sensor β
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β VCC β 5V
β GND β Ground
β Vo β Analog Output
β LED β Control Pin
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π Some models include extra control pins for LED timing
βοΈ Key Specifications
β‘ Operating Voltage: 5V DC
π Output: Analog voltage
π Detectable Particles: PM2.5, PM10
β± Response Time: Fast (ms range)
π Low power consumption
π¦ Comes with cable for easy connection
π Key Features
π«οΈ Detects fine dust particles
π Real-time air quality monitoring
π§ Easy to interface
π¦ Compact and lightweight
π Low power usage
π§ͺ Applications
π¬οΈ Air pollution monitoring
π Smart air purifiers
π Industrial safety systems
π Vehicle cabin air monitoring
π€ IoT environmental stations
π Interfacing
Compatible with:
π΅ Arduino
π‘ ESP32 / ESP8266
π Raspberry Pi (with ADC)
π Read analog output and convert to dust density
π Working Example
π Air Quality Monitor:
Dust enters sensor
Light scatters
Voltage output changes
Microcontroller calculates dust level
Display air quality
β οΈ Important Notes
β οΈ Needs calibration for accurate PM values
β οΈ Sensitive to humidity and airflow
β οΈ Requires proper sampling timing
β οΈ Fan/airflow improves accuracy
π Optical Dust Sensor vs Gas Sensor
| Feature | Dust Sensor | Gas Sensor |
|---|---|---|
| Detects | Particles (PM) | Gases |
| Output | Analog | Analog/Digital |
| Use Case | Air quality | Gas leakage |
| Accuracy | Moderate | Moderate |
π‘ Pro Tip
Use a fan or airflow channel for better readings
Combine with temperature & humidity sensor for accuracy
π Ideal for building a DIY air quality monitoring system
