Grove - Dust Sensor This Dust Sensor reports air quality by measuring the dust concentration in the environment. The level of Particulate Matter in the Air (PM level) is measured by calculating the LPO time per unit time. The LPO time depends on the intensity of the PM level. This sensor can provide reliable data for air cleaner systems; Responds to 1 um diameter PM. You can use this sensor in projects such as air cleaner, air quality monitoring, air conditioning system, smart fan. The sensitive and stable detection system not only detects particles such as cigarette smoke, but also detects particles that we can call house dust, which can trigger asthma attacks. Features: Grove compatible connection interface; Supply voltage ; Minimum particle size it can detect: 1um ; PWM output ; Technical Specifications: Dimensions: 59mm x45mm x22mm; Weight :28g ; Operating Voltage :4.75~5.75V ; Current drawn in standby mode: 90mA; Detectable particle density range :0~28,000 / 0 ~ 8000 pcs/liter / pcs/0.01cf ; Operating temperature :0~45 °C ; Minimum particle size it can detect :>1μm ; Dimensions: 59(W) × 45(H) × 22(D) mm ; Humidity range: 95% rh or less;