Features: 1. This sensor uses the principle of laser scattering, that is, the laser irradiates airborne particles 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. In addition, the microprocessor uses an algorithm based on MIE theories to obtain the equivalent particle size of the particles and the number of particles of different sizes per unit volume. 3. 0 false alarm rate, real-time response and support for continuous acquisition, the minimum resolution size of particles 0.3um. 4. Six-sided all-round cutting, strong anti-interference performance, optional direction of air intake and outlet. 5. Wide range of applications, users no longer need to design the air duct, ultra-thin design, only 12mm, suitable for portable devices. Specification: Item Type: PM2.5 Sensor Module Material: Aluminum Alloy Purpose: PM2.5 Detection Input Voltage: 5V Working Current: ≤100mA Counting Efficiency: 50% at 0.3um 98% at ≥0.5um Response Time: ≤10s Package List: 1 x PM2.5 Sensor Module 1 x Terminal