Features: PMS5003 is a kind of digital and universal particle concentration Sensors, which can be used to obtain the number of suspended particles in the air. the concentration of particles, and output in the form of digital interfaces. This Sensors can be inserted into variable instrument related to the concentration of suspended particles in the air or other environmental improvement equipments to provide correct concentration data in time. Lasers scattering principle is used for such Sensors. produce scattering by using Lasers to radiate suspending particles in the air, then collect scattering light in a certain degree, and finally obtain the curved of scattering light change with time. Perfect for health families, air Purifiers manufacturers, precise air particle detection. Ideal for integration into home air purifiers, office environment monitoring, and research laboratories, enhancing the effectiveness of air quality management. Specifications: Component:Plastic Size:Approx.50x38x21mm/1.96x1.49x0.82inch Package Includes: 1Pc PM2.5 Air Particle note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.