Optical pH sensor

Optics: measuring and testing – For light transmission or absorption – Of fluent material

Reexamination Certificate

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C436S528000, C435S287200

Reexamination Certificate

active

07835003

ABSTRACT:
An optical sensor for pH is described using a cross-linked network of bisilanes to immobilize a pH sensitive chromophore to a surface potentially exposed to a high pressure, high temperature environment such as wellbore effluents at a downhole location.

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