Patent ID: 8182682

Claim:
A fluid treatment element mountable in a housing, the fluid treatment element comprising: a hollow fluid treatment pack having first and second axial ends and including a porous fluid treatment medium having an upstream side and a downstream side; first and second end caps mounted to the first and second ends, respectively, of the fluid treatment pack to direct fluid through the porous fluid treatment medium from the upstream side to the downstream side, at least one of the first and second end caps having a outer surface which faces away from the fluid treatment pack and an inner surface which faces toward the fluid treatment pack; and a spring-biased electrical contact arrangement mounted to said at least one end cap, wherein the spring biased electrical contact arrangement includes a spring and a moveable conductive pin electrically coupled to at least one of the fluid treatment pack and said end cap, wherein the moveable conductive pin has a contact surface and is moveable between a first position wherein the contact surface is farther from the outer surface of said end cap and a second position wherein the contact surface is closer to the outer surface of said end cap, and wherein the spring is arranged to bias the conductive pin toward the first position to force the contact surface into electrical contact with a conductive portion of a housing, wherein the spring-biased electrical contact arrangement further includes a casing which houses the spring and at least a portion of the moveable conductive pin.