The working principle of on-line dust detector

On-line dust detector is a device for real-time monitoring and measurement of dust concentration in the air. Its working principle is mainly based on the principle of light scattering, as follows:

Laser light source: The detector uses a laser as a light source by sending a laser through the air sample to be detected.

Dust particle scattering: When the laser beam encounters dust particles in the air, the dust particles will scatter the laser, changing the propagation path and intensity of the laser.

Photodetector detection: the scattered laser light is received by the photodetector and converted into electrical signals.

Signal processing: The electronic components inside the detector process the electrical signal, and by calculating the intensity of the scattered light, the number and size of the dust particles can be calculated.

Concentration calculation: Based on the intensity of the scattered light and the known scattering coefficient, the concentration of dust in the air can be calculated.

Real-time monitoring: The detector displays the calculated dust concentration on the screen in real time, and can transmit the data to the remote monitoring system through the communication interface.

In addition, there are some on-line dust detectors that use the principle of electrostatic induction to infer dust concentration indirectly by measuring the behavior of dust particles in the electric field.

The advantage of the on-line dust detector is that it can continuously and real-time monitor the dust concentration, which helps to discover and control dust pollution in time, and protect the health of workers and environmental safety.