Electronic interface for water filter system

A water filter system comprising:

• a removable filter unit having a body portion including a proximal end and a distal end, wherein the proximal end is adapted to be inserted into a filter head assembly;
• an electronic device disposed on the filter unit and adapted to engage an electronic connector on the filter head assembly, wherein the electronic device includes a protective cover having a generally triangular-type cross-section that extends away from an outer circumference of the body portion to an apex of the triangular-type cross-section, and wherein a plurality of exposed metallic contacts are disposed on a substantially planar surface of the protective cover;
• and
• an engagement protrusion extending from the proximal end, the engagement protrusion having a first portion that includes a first radius of curvature and a second portion opposing the first portion that includes a second radius of curvature that is larger than the first radius of curvature.

A water filter system comprising:

• a filter unit with an electronic device adapted for engagement with an electronic connector of a filter head assembly, wherein the electronic device includes a protective cover having a generally triangular-type cross-section that extends away from an outer circumference of the filter unit to an apex of the triangular-type cross-section;
• a plurality of exposed metallic contacts disposed on a substantially planar surface of the electronic device;
• an engagement protrusion extending from a body portion, wherein a cross-section taken anywhere across a longitudinal extent of the engagement protrusion has only one axis of symmetry;
• a side aperture disposed on the engagement protrusion;
• and
• an end aperture disposed on the engagement protrusion.