PM-900 is a laser-based particle sensor which uses light scattering method to detect and count particles and calculate PM1.0, PM2.5 and PM10 concentration in a given environment. The sensor
features an imported processing chip and photosensitive element. Signals are collected and processed by the microprocessor chip and then output in digital format. The sensor is ideal to
detect the concentration of different particles precisely in real time.
Air purifiers, air quality detectors, fresh air systems, air conditioners and automobiles with air purifying function, consumer electronics.
Value to Customers:
Consistent, stable, reliable.
Small zero drift, good repeatability.
Compact size, easy to mount.
Low power consumption, long service life.
High sensitivity, fast response.
Proven EMc and EMI performance, strong anti-interference
The sensor is based on the particle concentration analysis technology of Mie scattering theory. A laser light source illuminates a particle as it is pulled through the detection chamber. The particles are scattering when passing through the laser beam. The information processing circuit converts the light intensity signal of the scattered light via the
photoelectric sensor into a voltage pulse signal, which is preamplified, converted by AD into digital signal. After noise processing and optimal algorithm analysis, particle count with the equivalent particle size per unit volume can be obtained, and then the particle concentration is calculated. Refer to the following figure for how the principle works: