Conductive conductivity sensor

A method for the manufacture of a conductive conductivity sensor, having:

• a probe, which is immersible in a measured medium and which comprises at least two electrodes made of a first, electrically conductive material and at least one probe body made of a second, electrically non-conductive material, said at least two electrodes are at least partially embedded in said at least one probe body and are insulated from one another by said at least one probe body;
• and said at least two electrodes and said at least one probe body are embodied as a composite workpiece;
• the method comprising the steps of:
• injecting the first and second materials in a multicomponent injection molding method, especially a multicomponent powder injection molding method, simultaneously, or in a two stage multicomponent injection molding method one after the other, into a mold cavity for producing a green body;
• and
• debindering and sintering the green body for producing a composite workpiece, which includes electrodes made of the first material and a probe body made of the second material, wherein:
• in said first step, the first material is injected in a first stage into its own mold, so that a green body forms;
• and
• said green body is transferred in a second stage into another mold and injected around with the second material.

A conductive conductivity sensor, having:

• a probe, which is immersible in a measured medium and which comprises at least two electrodes made of a first, electrically conductive material and at least one probe body made of a second, electrically non-conductive material, wherein:
• said at least two electrodes are at least partially embedded in said at least one probe body and are insulated from one another by said at least one probe body;
• said at least two electrodes and said at least one probe body are embodied as a composite workpiece;
• the conductivity sensor has at least four electrodes;
• and
• in each case, the end faces of two electrodes are exposed in a respective one of two surfaces of said at least one probe body, which lie opposite one another.