Patent ID: 11879330
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Measurement (Instruments)
Classification: CPC E  G | IPC E  G

Claim 9:
10. A system, comprising:
an optical source configured to provide an illumination light;
an optical computing device; and
a controller,
wherein the optical computing device comprises:
an ion selective substrate placed in a sample cell that interacts a sample with the ion selective substrate to modify an optical characteristic of the ion selective substrate according to an ion concentration in the sample, wherein the sample cell optically interacts the illumination light with the ion selective substrate and generates a sample light;
an optical element that interacts with the sample light to provide a modified light that has a property indicative of a property of the sample; and
a detector that receives the modified light and provides an electrical signal proportional to the property of the modified light to the controller, and

wherein the controller is configured to determine the property of the sample from the property of the modified light; and
wherein the ion selective substrate comprises a membrane, the membrane configured to change an optical property in a selected wavelength range, according to the property of the sample, wherein the membrane comprises multiple materials each having different cutoff concentrations.