What are the disadvantages of air sampling very early smoke alarms?

Air sampling style detector consists of sampling pipe network, sampling holes, detection host and other components

It has a wide range of applications, high sensitivity, sampling pipe network layout flexibility, and can be adapted to the environment of the place. Because of its detection mode to rely on the extraction of air samples to do analysis, so the quality of its construction on the use of the detector has a great impact on the environment in some of the more dirty places, the sampling hole is easy to be blocked, the need to do frequent blowing. For such detectors, due to its extremely high sensitivity, its detection technology is fundamentally divided into two kinds of light scattering and cloud chamber, for the light scattering type of equipment, when the environment in dirty places using high sensitivity will often have false alarms trouble.