Core Technical Specifications

Operating Voltage: 4.5V to 5.5V DC (Typically 5V)
Current Consumption: Max 20mA (Peak current when pulsed)
Output Format: Analog voltage output (0 to over 3.5V)
Sensitivity: 0.5V per 0.1mg/m of dust concentration
Detection Range: Up to 600 g/m
Dimensions: 46.0 mm 30.0 mm 17.6 mm
Minimum Particle Detection Size: 0.8 microns

Required Circuit Interface ComponentsTo successfully interface the sensor with a microcontroller (like an Arduino), you cannot simply connect power and read data. The internal infrared LED must be pulsed cleanly. Most retail packages include these two crucial components:

150 Resistor: Used to limit current to the infrared LED.
220 F Capacitor: Acts as a decoupling capacitor to stabilize power during rapid current spikes when the LED pulses.

Pin Configuration (6-Pin Connector)

V-LED: Connects to 5V through the 150 resistor.
LED-GND: Connects directly to the system Ground.
LED: Connects to a digital output pin on the microcontroller to toggle the infrared emitter.
S-GND: Device circuit Ground.
Vo: Analog output voltage pin connected to an Analog-to-Digital Converter (ADC) input on your microcontroller.
Vcc: Main 5V power supply input.

Primary Applications

Smart Air Purifiers: Triggers fans when smoke or heavy house dust is introduced.
HVAC Systems: Air conditioners or indoor ventilation systems to monitor general air filtration quality.
DIY IoT Electronics: Cost-friendly introductory air pollution or fire/smoke alarm monitors.