Particle Sensor UnitPPD42NJ
Based on the light scattering method, it detects airborne particles continuously.
Pulse output 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.
More compact, lighter, and easy installation.
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)