Contamination level indicator

Details Contamination level indicator Contamination level indicator

G - Physics

01

N

73/97

G01N 15/06 (2006.01)

Patent

CA 1217655

Abstract CONTAMINATION LEVEL INDICATOR Apparatus for providing an indication of the level of contaminant in a fluid includes a pervious barrier (12) disposed across a fluid path (11) so that the barrier (12) will be progressively blocked by contaminant in the fluid. Monitoring means responsive to the rate of blocking of the barrier provides an indication of the level of contaminant in the fluid. The monitoring means may be means for sensing measurements representing the rate at which the pressure of the fluid upstream of the barrier (12) rises. Alternatively the monitoring means senses measurements representing the rate at which the flow rate of fluid through the barrier (12) falls. The provision of an indication conveniently completes a measurement cycle and there is means for renewing the barrier, either by back-flushing the barrier(12) or alternatively by exchanging one barrier for another.

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