| 摘要 |
<p>A handheld device for detecting the presence of biological and chemical airborne particles. The device collects a sample by drawing air in through a filter that allows air t pass through but collects particles in the air that are larger than the pore size of the filter, which may be selected to meet the user's needs. The filter is then subjected to an optical detection assembly that utilizes UV light directed on the filter and detects visible light emitted by any collected particles via a photomultiplier tube. Prior to collecting a sample, the filter is subjected to the optical detection assembly to generate a baseline reading, which is compared with the test results of the collected sample to determine the presence or absence of particles, such as mold.</p> |
