Patent ID: 7795883

Claim:
A grid sensor for measuring impedance distribution of a fluid in a measuring cross-section of a flow channel, comprising: a sensor body including a conduit wall forming an inner boundary of a measuring flow conduit, first and second grids of electrode wires that are insulated from one another and from the conduit wall of the measuring flow conduit, said electrode wires being attached in an electrically insulated manner to said sensor body such that each of said electrode wires span the a cross-section of the measuring flow conduit along a span direction, first ones of said electrode wires of said first grid intersecting, without touching, second ones of said electrode wires of said second grid at a pre-specified distance, and each of said electrode wires being individually electrically connectable from outside said sensor body; a spring being disposed in a hole in said sensor body, each of said electrode wires being mechanically connected via an insulating bead to said spring, an axis of the hole being in the span direction of a corresponding one of said electrode wires, and the spring being attached to said sensor body in the hole; each of said electrode wires being covered, on a side opposing said spring, with an insulating tube that is disposed in a channel in said sensor body that leads outward therefrom, said insulating tube terminating in a cavity inside said channel which is filled with a sealing mass, neither said insulating bead nor the insulating tube being disposed in the measuring cross-section.