Method and apparatus for particle concentration detection using a cloud chamber

摘要: Method and apparatus for sampling the gaseous medium of a zone or area to determine concentration, changes in submicron particles suspended that using an elongated cloud chamber. A light source phototransistor are disposed chamber spaced apart so as be electronically responsive varying levels light. microprocessor is connected programmable memory EPROM has pre-programmed data instructions on particle concentration levels. The sequences operate valves sequentially sample chamber, opens exhaust valve create condition reduced gas pressure therein. containing then precipitates condenses portion proportion particles. measures change intensity due storage device records each sensed measured dangerous concentrations can detected being treated.