Delphi Probe Air Meters measure the mass of air ingested by the engine using hot wire anemometry. The concept is simple, the implementation is unique. The heart of the design is a platinum-based, glass-coated, heated sensing element which is a low mass, quick responding device used in a bridge circuit configuration. The element leads have the unique combination of high electrical conductivity and low thermal conductivity to maximize the signal to noise ratio of the air flow. The "brains" of Delphi Probe Air Meters are contained in a custom integrated circuit.
