The online airborne particle counter is a system that measures the size and quantity of airborne particles contained in a unit volume of air in a clean air environment.This online particle counter adopts a new international sensor for detecting the concentration of airborne particles in the air,it is a high-tech product integrating optics and laser technology electronic technology, computer technology, precision machinery, aerodynamics, and other disciplines.It is characterized by high measurement accuracy, reasonable detection, stable performance,multiple functions, unique modeling, small size, light weight,easy installation, It is mainly used for online monitoring of cleanliness in clean environments，evaluating the change trend of ambient air dust particles, online monitoring, early warning, and alarming of ambient air quality and fugitive dust, etc..This transmitter is designed to detect particle size classes and sampling methods in accordance with international standards (ISO14644, EU-GMP), and its performance indicators comply with national standards and national metrological verification regulations,It is widely used in online environmental monitoring in pharmaceutical, microelectronics, optics,medicine and health, biological products, atmospheric analysis, aerospace, and other departments.