Abstract: A contacting-type conductivity sensor includes an electrically-insulative plastic body and a plurality of electrodes. The plurality of conductive electrodes is disposed in the plastic body. Each electrode is constructed of plastic and fused with the electrically-insulative plastic body. A method of manufacturing the conductivity sensor is provided along with a single-use bioreactor employing the sensor.

Abstract: A pH sensing bioreaction system is provided. The system includes a bioreaction container having a plastic wall and a pH sensor attached to the plastic wall. The pH sensor includes a sensor body having a flange that is sealingly attached to the plastic wall. The sensor body has a reference electrolyte therein and a first sensing element disposed in the reference electrolyte. The first sensing element is configured to contact both the reference electrolyte and a sample solution inside the bioreaction container. A second sensing element is positionable into an interior of the bioreaction container. The pH sensor has a plurality of configurations that include a booted configuration in which at least one sensing element is isolated from the interior of the bioreaction container, and a service configuration in which the at least one sensing element is fluidically coupled to the interior of the bioreaction container.

Abstract: A pH sensing bioreaction system is provided. The system includes a bioreaction container having a plastic wall and a pH sensor attached to the plastic wall. The pH sensor includes a sensor body having a flange that is sealingly attached to the plastic wall. The sensor body has a reference electrolyte therein and a first sensing element disposed in the reference electrolyte. The first sensing element is configured to contact both the reference electrolyte and a sample solution inside the bioreaction container. A second sensing element is positionable into an interior of the bioreaction container. The pH sensor has a plurality of configurations that include a booted configuration in which at least one sensing element is isolated from the interior of the bioreaction container, and a service configuration in which the at least one sensing element is fluidically coupled to the interior of the bioreaction container.

Abstract: A contacting-type conductivity sensor includes an electrically-insulative plastic body and a plurality of electrodes. The plurality of conductive electrodes is disposed in the plastic body. Each electrode is constructed of plastic and fused with the electrically-insulative plastic body. A method of manufacturing the conductivity sensor is provided along with a single-use bioreactor employing the sensor.

Abstract: A process analytic sensor for sensing a characteristic of a process fluid is disclosed. The sensor includes a housing including a sensing portion having an electrical characteristic that varies with a characteristic of the process fluid. An instrument cable has at least one electrical conductor. An electrode connection space is located within the housing and the at least one electrical conductor is electrically coupled to a respective conductor of a sensing element of the sensing portion. A fill material is disposed in the electrode connection space. The fill material cures through exposure to moisture and the fill material is uncured and sealed within the electrode connection space.

Abstract: A sensor for analyzing a liquid sample is provided. The sensor includes a sensor body defining a chamber therein. A sensing cell is disposed within the chamber and is adapted to contact the sample solution. The sensing cell has a sensing cell fill solution therein, and a sensing electrode disposed within the sensing cell fill solution. A reference fill solution is disposed within the sensor body. A reference junction is arranged to contact the reference fill solution and the sample solution. A temperature sensitive device is disposed within the body and is configured to provide a temperature sensitive device output. A reference electrode is disposed within the sensor body in contact with the reference fill solution. A solution ground electrode is disposed within the sensor body and spaced from the reference electrode.

Abstract: An electrochemical sensor structure includes a housing having an inner surface defining a housing cavity. The sensor also has an inner body having an outer surface. The outer surface of the inner body and the inner surface of the housing have engaging portions which directly engage one another to form a channel therebetween. The channel defines an ionic junction in the sensor.

Abstract: An industrial process sensor includes a proximal end, a distal end, a longitudinal axis and an outer diameter surface. A cam follower surface is recessed into the outer diameter surface. A diameter reduction is formed on the outer diameter surface, between the cam follower surface and the distal end. The diameter reduction defines an annular process sealing shoulder that faces the distal end and lies in a plane intersecting the longitudinal axis. A sensor element is carried at the distal end. A cable is electrically coupled to the sensor element and extends from the proximal end.

Abstract: An Ion-sensitive Field Effect Transistor (ISFET) sensor for sensing ion activity of a solution includes a substrate and an ISFET semiconductor die. The substrate has front surface exposed to the solution, a back surface opposite to the front surface and aperture extending between the front and back surfaces. The ISPET semiconductor die has an ion-sensitive surface with a gate region. The ion-sensitive surface is mounted to the back surface such that the gate region is exposed to the solution through the aperture.

Abstract: A pH sensor has a core of an electrochemically inert insulating or semi-conductive material, and is coated with an electrically conductive, electrochemically sensitive coating. The preferred core is insulating and made of alumina, with a thin coating of iridium oxide deposited over at least a portion of the outer surface of the core. The coating is carried to a surface remote from the sensing surface and is used for making electrically conductive connections that lead to remote circuitry. The core is made in a form that can be supported and held in an insulating, electrochemically inert, deformable material that is sealed around the outer surface of the coating on the core to prevent leakage of chemicals being sensed. The body also permits sealing quite easily onto access ports on which the sensor housing is mounted. Various connections to the electrode coating can be made quite easily to provide for a unique sensor assembly.

Abstract: The present invention includes an ion diffusion junction in an electrochemical cell. The junction includes a polymer matrix that is impermeable to the sample solution. A plurality of inclusions are disposed within the junction matrix and oriented to form continuous hydrolytic pathways extending between the sample solution and the reference electrolyte such that ion diffusion occurs along the hydrolytic pathways.

Abstract: A solid electrolyte for use in a reference electrochemical half cell, the electrolyte comprising an insulative binder forming a matrix, a particulate salt dispersed within the binder and immobilized by the binder, and a hydrophilic polymer network disposed within the binder in an amount sufficient to effect ion diffusion within the electrolyte.

Abstract: An electrochemical sensor for measuring an electrochemical parameter such as pH in a flowing liquid has a housing with a lateral cutout or indentation. An indicator electrode and a reference junction extend into the indentation from opposite sides so that they are facing one another and are axially aligned along a common longitudinal axis which is generally perpendicular to the flow of liquid.