ZIYUN In Grove Dust Sensor,Detection Cigarette Smoke,House Dust Which Are Indoor Asthma Triggers,Detection Air Quality(An Environment Measuring The Dust Concentration) This Dust Sensor gives a good indication of the air quality in an environment by measuring the dust concentration. It can be applied to air quality sensing, dustless workshop implementation, cigarette smoke detection, air quality monitoring. Stable and sensitive detection of not only cigarette smoke but house dust which are indoor asthma triggers. Air is self-aspirated with the current of air generation mechanism with a built-in heater. Easy maintenance. High sensitivity lasts long term.ROHS certification