include an easily removable filter cartridge comprised of a shell that conforms to the housing and includes the plate and porous filter elements the housing further includes a quick disconnect end cap that includes an electrical connection to a power supply an electrically conductive spring is interposed between the power supply and an adjacent plate this arrangement allows for a very simple safe quick and cost effective procedure to change filter cartridges the cartridge structure additionally allows for the easy checking of proper continuity between electrodes during the cartridge assembly application_number US 71725591 A description referring more particularly to the drawings the electrostatic filter of one embodiment of the present invention is generally indicated by the numeral 10 in fig1 and 3 as shown therein the filter 10 has a housing or case 12 including an open end side wall 13 of substantially cylindrical construction which is substantially symmetrical about its longitudinal axis the housing has a first or inlet end portion 14 and an opposite second or outlet end portion 16 spaced longitudinally therefrom the inlet end portion 14 includes inlet end cap 20 while the outlet end portion includes outlet end cap 30 both of which may be made easily removable in this embodiment however only the outlet end cap 30 is provided with a quick disconnect feature which will be more fully described infra the housing is of predetermined dimensions and provides an interior volume generally related to the anticipated rate of flow of fluids through the particular fluid system in connection with which the filter is adapted to be used the housing is preferably made of a non conductive material such as a plastic for reasons related to ease and cost of construction as well as ease of electrical.