Abstract
A method of measuring the remaining useful life of a filter may comprise flowing a particulate-laden fluid through a filter and measuring a parameter of the flow during the flowing. From the measurements of the parameter, measurements of the remaining useful life of the filter that vary linearly during the time in which the fluid is flowing through the filter may be produced. The method may include, storing in a store a previously measured correlation between the parameter and the remaining life for a trial filter corresponding to the filter on flowing the particulate-laden fluid therethrough. The store may receive the measurements of the parameter and output measurements of the remaining useful life corresponding to the received measurements of the parameter and derived from the previously measured correlation.
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