Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1991-10-22
1993-06-22
Tung, T.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204418, 204419, 204433, 204435, G01N 2726
Patent
active
052214567
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.
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Article from Sensors and Actuators, B1 (1990) pp. 293-297 entitled "Mechanistic and Response Studies of Iridium Oxide pH Sensors", by M. J. Tarlov et al.
Benton Barry W.
Majerus Lawrence R.
Rutt Donald R.
Sittler Fred C.
Toy Adrian C.
Bell Bruce F.
Rosemount Inc.
Tung T.
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