PM2.5 module

The PM2.5 infrared module uses infrared turbidity detection method to detect fine dust with particles > 1 μm. The PM2.5 laser module uses a stable airflow system such as a fan or blower, and uses an optical sensor to identify dust particles > 0.3 μm.

PM2.5 module: The civil market is divided according to light source
• Infrared dust sensor - mainly used for qualitative detection of PM2.5
• Laser dust sensor - mainly used for qualitative and quantitative detection of PM2.5

PM2.5 module applications:
• Air purifiers, car air purifiers, air conditioners, air quality monitoring, environmental monitoring and handheld air quality detection, etc.

Nuvoton PM2.5 module solution:
• PM2.5 infrared module: the main control adopts  N76E003  microcontroller (1T enhanced 8051 18 KB Flash, built-in 12-bit ADC)

• • Infrared turbidity detection method: The light source is an infrared LED. The air inlet and outlet mainly rely on resistance heating to obtain hot air flow. When particles pass through, a high level is output, and the output signal is mostly PWM. Particles >1um indicate preliminary grade and are suitable for industrial and mining dust detection.

• • Main control microcontroller: N76E003
    • 1T enhanced 8051 Flash
    • 18 KB Flash ROM, 1 KB Data RAM
    • Built-in 12-bit ADC
    • Wide voltage operating range: 2.4V ~ 5.5V, industrial-grade operating temperature: -40 ~ 105 °C
    • Built-in high-precision RC oscillator 16MHz, ±1% error at normal temperature; ±2% error at full temperature and full voltage
    • Excellent ESD & EFT immunity: EFT / 4.4 kV & ESD / HBM, up to 7 kV
    • Package: TSSOP20/QFN20 (3mm x 3mm)

• PM2.5 laser module: The main control adopts M031  microcontroller (32-bit Arm® Cortex®-M0, built-in 2 Msps ADC)

• • Using a stable airflow system such as a fan or blower, optical sensors in the air path obtain information such as particle tangential movement speed, normal movement speed, particle size, and reflective intensity. Using particle size and reflective intensity information, the size of passing particles can be accurately determined; at the same time, the total particle mass and concentration can be calculated by measuring the number of particles per unit time through the sensor. It has a variety of digital interfaces, particles >0.3um, indicating value, suitable for home, car, handheld and other air detector purifiers.

• • Main control microcontroller: M031
    • Arm® Cortex®-M0 48 MHz
    • 16 ~ 128 KB Flash ROM, 2 ~ 16 KB Data RAM
    • Built-in 12-bit ADC up to 2 Msps and 5-channel PDMA
    • 512 Byte SPROM facilitates project management and encryption
    • Built-in high-precision RC oscillator 48 MHz, ±2% error at full temperature and full voltage
    • Voltage operating range: 1.8V ~ 3.6V (supports 5V interface), industrial-grade operating temperature: -40 ~ 105°C
    • Excellent ESD & EFT immunity: EFT / 4.4 kV & ESD / HBM, up to 7 kV
    • Package: TSSOP20/28, QFN33, LQFP48/64