Patent ID: 9182355
Filing Date: 2015-11-10
Classification: G01N

Abstract:
1. A system, comprising: a flow path containing a fluid and providing at least a first monitoring location and a second monitoring location; a first optical computing device arranged at the first monitoring location and having a first integrated computational element configured to optically interact with the fluid and convey optically interacted light to a first detector which generates a first output signal corresponding to a characteristic of the fluid at the first monitoring location; a second optical computing device arranged at the second monitoring location and having a second integrated computational element configured to optically interact with the fluid and convey optically interacted light to a second detector which generates a second output signal corresponding to the characteristic of the fluid at the second location; and a signal processor communicably coupled to the first and second detectors and configured to receive the first and second output signals and determine a difference between the first and second output signals, wherein at least one of the first or second integrated computational elements comprises a plurality of alternating layers of two different materials, the two different materials are selected from the group consisting of silicon, silica (SiO