... cigarette smoking,alcohol,perfum or other strong smell in air3.Sensor:imported from Janpan4.Application:school,office,home,shopping mall and ... .Function:Constantly monitor the presence of cigarette smoke in air4.Sensor:semiconductor gas sensors imported (stability 10 years)5.Voltage:AC100V ... °F)12.Weight:8513.Size:135*90*30(MM)When sensor built-in felt smoke,it will blink and remind with ...