| 摘要 |
An air filter housing (1) has at least one filter chamber (2, 3) for receiving at least one filter unit (F), the filter chamber having an inlet end and an outlet end, and elements (18, 19) for measuring particle concentration in the air leaving the filter chamber. The measuring elements (18, 19) include a row of several particle detectors (20) affixed to a common support (21), members (23-31) for moving the support in a direction perpendicular to the row of detectors, and members for connecting each of the detectors to a counter. |
