DOP Principle of leak detection method
Highefficiency filter leakage detector is usually adopt DOP generator in the filter upstream Send dust, Using a photometer (photometer)detection filter upstream and downstream aerosol concentration to determinewhether the for leaks. The sendingdust of purpose is high efficiency filter upstream dustparticle concentration compare lower, Use only particle counter in the case ofdon't hair dust under the circumstances detection, Compare difficult discoverout there for leaks, Need to supplement sending dust can obviously,easy discover leaks.
When airflowBy vacuum pump smoke to light scattering chamber,Thereinto particulate matter thescattered ray solstice photomultiplier, In photomultiplier tubes, light wavesconvert into electrical signals,This signal after amplification and digitization Bymicrowave processor the analyze, Thereby to determine the intensity of thescattered light. With the reference substance procreant the signalcontrast, Can the particulate matter in the direct measurement of gas massconcentration, Therefore its application is very extensive.