Patent ID: 9403110
Filing Date: 2016-08-02
CPC Classification: B01D,F02M,G01N

Claim Text:
1. A filter assembly comprising: a filter housing; a qualified filter element; a plurality of magnetic elements disposed on at least one of the filter housing and the qualified filter element, the plurality of magnetic elements each having a magnetic field; a plurality of wires disposed on at least the other of the filter housing and the qualified filter element; and a control circuit that is electrically coupled to the plurality of wires and that detects an electrical current in the plurality of wires; wherein when the qualified filter element is installed in the filter housing, the plurality of wires cuts the magnetic field of at least one of the plurality of magnetic elements and thereby changes the electrical current in the plurality of wires; wherein the control circuit determines that the qualified filter element is installed in the filter housing based on a change in the electrical current in the plurality of wires.