With the rapid development of industrialization and the increase in vehicles, the urban environment has gradually been affected, leading to higher concentrations of PM2.5 and frequent smoggy weather. The primary task in addressing smog pollution and improving air quality is to control PM2.5. Current weather forecasts also monitor PM2.5 concentrations to remind everyone to take protective measures. When indoor air is polluted, many people choose air purifiers to clean the air. The dust sensor within an air purifier is an extremely important component. What role does the dust sensor play in an air purifier?

The dust sensor is used to detect the dust concentration in the air around us, which is the PM2.5 value. The working principle of the dust sensor is based on the principle of light scattering: an LED emits light which reflects upon hitting dust particles; the receiving sensor then detects the intensity of this reflected light and outputs a signal, determining the dust concentration based on that signal intensity.

Indoor air quality and dust concentration are matters of great concern. In rooms with poor ventilation, a large amount of suspended particulate matter and dust can exist, which over time can cause dizziness and breathing difficulties, or in severe cases, symptoms like chest tightness, cold sweats, and nausea. Indoor air quality poses a serious threat to human health. To solve indoor air quality issues, besides frequently opening windows for air circulation, installing an air purifier is also essential. An air purifier mainly consists of a dust sensor, a filtration system, and a monitoring system. The role of the dust sensor in an air purifier is to detect and display indoor dust concentration; based on this concentration, the control system adjusts the fan intake, the purifier filters dust from the air, and clean air is output.

The LD13 laser dust sensor is a high-precision particulate matter concentration sensor based on Laser Mie Scattering theory. It can continuously collect and calculate the number of suspended particles of different sizes in the air per unit volume—namely the particle size distribution—and convert it into mass concentration to be output via a universal digital interface. This sensor can be embedded into air purifiers to provide timely and accurate concentration data.

LUFTMY's current product line includes laser dust sensors, dust sensors, micro-dust sensors, and infrared sensors. Through continuous R&D and the manufacturing of latest processes, these products offer high sensitivity, consistency, and stability, earning widespread recognition and praise from customers in the industry. For more product information or sample requests, please contact our customer service.