Electrode device for monitoring liquid levels

Claim 1

An electrode device for use in monitoring conductive liquids comprising: a mounting having a central opening; a first electrode having a tie rod portion disposed through the central opening of said mounting and insulated therefrom; a clamping collar secured to said tie rod adjacent to one side of said mounting, said first electrode including an extending end portion connected to the clamping collar; a second electrode in the form of a tubular sleeve coaxially surrounding said first electrode and insulated therefrom, said second electrode including an end flange at one end, and having a central opening surrounding said first electrode between its collar and said one side of said mounting, the opposite end of said second electrode being open to permit the free end of said extending end portion of said first electrode to extend from said opening; a counter electrode in the form of a tubular sleeve and coaxially surrounding said first and second electrodes, said counter electrode having one end secured and electrically connected to said mounting; a pair of insulated washers disposed on each side of the end flange of said second electrode coaxial to its central opening for insulating said second electrode from said mounting and the clamping collar of said first electrode; a contact sleeve disposed through the central opening of said mounting and coaxially surrounding the rod portion of said first electrode, said sleeve disposed through one of said washer pair and supported on a second of said washer pair adjacent said clamping collar, said contact sleeve being disposed through the central opening and electrically secured to the end flange of said second electrode; and means engaging one end of said tie rod portion for securing said first electrode to the opposite side of said mounting and for securing the end flange of said second electrode and its washer pair between said side of said mounting and said clamping collar.