Coolant filter with coolant additive sensor

摘要

A replaceable coolant filter assembly includes a housing, a filter element having and an end plate to define a fluid path through said filter and comprising a coolant additive sensor having a sacrificial sensing element disposed within said housing in contact with said fluid path. An electrical circuit connecting a microprocessor to the sensing element is grounded through the filter housing to an engine, the microprocessor being responsive to the opening of said sensing element circuit by corrosion an alarm device.