Patent ID: 6995563

Claim:
An electrodeless conductivity sensor comprising: a toroid assembly including at least primary and secondary toroidal electromagnetic coil windings disposed in spaced, coaxial relation to one another; a signal port coupled to said toroid assembly, said signal port configured for connection to a process variable transmitter; a housing defining a process flow path extending coaxially through, while being spaced from, said toroid assembly; said housing being electrically non-conductive; first and second connectors disposed at first and second ends of said flow path, respectively; said connectors being electrically conductive and non-metallic; said connectors configured for series coupling within a fluid flow conduit, wherein said connectors and said process flow path are configured to enable a process fluid to flow therethrough; wherein said connectors are configured for disposition in physical contact with the process fluid flowing therethrough; said primary toroid configured to induce an electric current in the process fluid as the process fluid passes through said flow path, wherein the current varies with conductivity of the process fluid; and said secondary toroid configured to detect the electric current in the process fluid as the process fluid passes through said flow path, the current being proportional to the conductivity of the process fluid.