Patent ID: 6159384
Filing Date: 2000-12-12
Classification: B01D,C02F,Y02W

Abstract:
A filter bed for a liquid filtration system, comprising:(a) an underdrain;(b) at least one layer of filter media situated on top of said underdrain;(c) a controller located outside the filter bed to determine pressure differentials from a plurality of pressure readings; and,(d) a differential pressure monitor located within the filter bed for measuring pressure at a plurality of heights in the filter bed, the monitor comprising:a body having an upper end and a lower end, said body having a generally uniform cross section;a plurality of pressure sensors located on said body for obtaining pressure readings at a plurality of corresponding heights across said at least one layer of filter media wherein the monitor is at least partially submerged in the filter media; and,a transmitter to transmit the pressure readings from said pressure sensors to said controller.