Optical Sensing PPD20V, Particle sensor, dust, Measuring instrument

Shinyei Technology

Particle Sensing

Particle Sensor UnitPPD20V

Based on the light scattering method, it always detects the An analog voltage that corresponds to concentration per unit volume of particles can be obtained, with using an original detection method based on light scattered principle similar to the particle counter.


  • Stable and sensitive detection of not only cigarette smoke but house dust which are considered as indoor asthma triggers.

  • Air is self-aspirated by the air current generation mechanism with a built-in heater.

  • Easy maintenance. Sustainable high sensitivity.

  • Compact and light, and easy installation.

  • Voltage output

How It Work

  • Heater (resistor) generating updraft. Infrared light beam from LED has been focused with Lens to sensing point at the center.
  • Airborne particles have been taken into the sensor box with the updraft.
  • Particle passing through sensing point scatters light, and receptor receive scattered light through the lens and transformed into pulse signal. Pulse per unit time is proportional to the particle concentration. Pulse signal are to be converted into voltage output. (PPD20V)


Air Purifier, Air Quality Monitor, Air Conditioner, Ventilator