Feature 1 This sensor uses the principle of laser scattering, that is, the laser is irradiated on suspended particles in the air to produce scattering, and at the same time, the scattered light is collected at a specific angle to obtain the curve of the scattered light with time. 2 Furthermore, the microprocessor uses an algorithm based on the MIE theories to obtain the equivalent particle size of the particles and the number of particles of different sizes per unit volume. 3 0 error alarm rate, realtime response and support for continuous acquisition, minimum resolution particle size 0.3um. 4 Sixsided omnidirectional shielding, strong antiinterference performance, optional direction of air inlet and outlet. 5 Wide range of applications, users no longer need to design the air duct ultra-thin design, only 12 mm, suitable for portable devices.Item Type: PM2.5 Sensor ModuleMaterial: Aluminum alloyPurpose: PM2.5 detectionInput Voltage: 5VWorking Current: 100mACounting Efficiency: 50% at 0.3um 98% at 0.5 umResponse Time: 10 s Package List1 x PM2.5 Sensor Module1 x Terminal