Ceiling PM2.5 sensor, is a based on ZigBee / SmartRoom HA protocol detect airborne dust concentration sensor using optical methods. This product is able to monitor dust in the air, monitoring air quality, and the ability to distinguish between different dust particle concentration. This product is widely used, in addition to the common smart home system can also be used in intelligent buildings, municipal engineering, wisdom farming, factories, and other intelligent systems. [Intelligent home experience center QQ exchange group: 197 503 349] Features: 1, support ZigBee / SmartRoom HA protocol; 2, ZigBee / SmartRoom Device Type: Repeater; 3, reliable, stable and accurate data; 4, the smallest detectable particles diameter of 0.5μm; ten years of research and development operations, 127 patents, more than 1,000 domestic dealers, 400 million of capital financing, Nanjing IOT Sensor Technology Co., Ltd., a well-deserved giant field of intelligent home! Free agent training, security service, museum and renovation subsidies, technical counseling support, year-end rebates, smart home leading brands, international ZigBee Alliance China regional headquarters, the Allianz Group was welcome to join!