FILTER LIFE MEASUREMENT

摘要

A filter (11) is connected to a measurement device as a particulate-laden fluid is flowed through the filter (11). The device measures the differential pressure across the filter (11) and passes this measurement to a control unit (21) which contains a store (27) holding measurements of the remaining useful life of the filter (11) that vary linearly with time and correlated to measurements of differential pressure. For each measurement of differential pressure produced by a transducer (17), the control unit (21) outputs the corresponding measurement of remaining useful life. This continues until the remaining useful life is zero. An alarm (26) may be sounded at this stage or at any predetermined stage.