The dust concentration sensor is mainly used to continuously monitor the total dust concentration in dust workplaces such as mines and cement plants. It is a high-tech sensor developed by using the principle of laser scattering to meet the needs of monitoring dust concentration in existing coal mines. It can monitor and display the underground dust concentration in real-time, on-site and continuously under the natural airflow state, and output the on-off signal of the water spraying dust suppression device at the same time, thus achieving the best effect of dust measurement and dust suppression.

The outside air enters the sensor darkroom through the labyrinth air inlet under the suction of the exhaust fan. When the floating dust in the air is irradiated by the parallel light emitted by the laser generator in the darkroom, the scattered light intensity of the dust is directly proportional to the mass concentration, and the scattered light is converted into photocurrent by the photoelectric converter, and then converted into photoelectric pulse number directly proportional to the scattered light intensity by the photocurrent integration circuit of the main control board. The relative mass concentration of dust can be measured by counting the number of pulses, and the mass concentration of dust in the air (mg/m3) can be directly displayed on the digital display screen by calibrating the preset K value on the keyboard during work.

CW-76S dust sensor (dust detector) is a high-tech product which integrates aerodynamics, digital signal processing and photoelectricity independently developed by Shenzhen Sainawei. It is mainly used to detect the dust mass concentration (PM value) in the atmosphere, and is suitable for construction sites, urban grid monitoring, mobile monitoring and other fields and occasions. It is the core module of air quality detection system.