In March , 2018, accompanied by Waltonchain Chairman Do Sang Hyuk and Waltonchain Korea GM Shan Liang, the Representative Director of NIDS (Korea) Hwang Hak In visited KEDIHENG. Guo Rongxin, the GM of KEDIHENG, showed them the exhibition hall of KEDIHENG. Prof. Hwang Hak In and Guo Rongxin discussed the cooperation issues concerning dust sensor application to achieve the goal of mutual benefit.

Editor’s Note:

Dust sensors

Dust sensors can be applied to air cleaners in which dust concentration measurement is required, air quality (PM 2.5) detectors, air cleaning equipment, air conditioners and other environmental monitoring equipment.

Currently there are two main dust sensor types used in the field of PM 2.5 detection and air purification: infrared particle sensors and laser particle sensors.

The light source for infrared particle sensors is an infrared LED. And the light source for laser particle sensors is a laser diode.

1 µm or above particles can be detected by infrared particle sensors, and 0.3 µm or above particles can be detected by laser particle sensors. Laser particle sensors are advantageous compared to infrared particle sensors in terms of sampling number, data source and algorithm.

Infrared particle sensors are mainly used to detect industrial and mining dust with large particles and high concentration, and it cannot be used for PM2.5 detection. Laser particle sensors are mainly used for PM2.5 detection.