An optical interferometric sensor presents a first optical path defining a sensing arm and a second optical path defining a reference arm. The sensor includes with respect to the first and second optical path an optical splitter placed upstream and an optical combiner placed downstream. Along the sensing arm are placed a first waveguide comprising a substrate and a binding surface functionalized to bind to at least one marker of an analyte and a first optical element. Along the reference arm are placed a second waveguide including a substrate identical to the substrate of the first waveguide and a second optical element presenting the same optical response of the first optical element. The sensor further includes a single microfluidic channel running through the first and the second waveguide.

A polymer-based sensor for detecting agricultural analytes is disclosed, including stable polymer-based sensing films such as molecular imprinted polymers (MIPs) that can be incorporated in sensors for detecting herbicides and pesticides, as well as methods of making the sensing films.

A battery management system includes one or more fiber optic sensors configured to be disposed within an electrochemical battery. Each fiber optic sensor is capable of receiving input light and providing output light that varies based on the input light and an amount of free or dissolved gas present within the battery. A detector detects the output light and generates an electrical detector signal in response to the output light. Battery management circuitry determines the state of the battery based at least in part on the detector signal.

The present invention relates to a tuneable hydrogen sensing device, to a method for producing said thin-film device, to a use of said thin-film device for detecting a chemical species, to a sensor, such as a hydrogen sensor, to a device comprising said sensor, and to an apparatus for detecting hydrogen.

A point of care analyte detection and quantification system for healthcare application is provided. Related methods are also provided.

Presented herein are methods, systems, and apparatus for single analyte detection or multiplexed analyte detection based on amplified luminescent proximity homogeneous assay (alpha) technology, but using hollow polymer fiber optics doped with acceptor bead dye (e.g., thioxene, anthracene, rubrene, and/or lanthanide chelates) or donor bead dye (e.g., phthalocyanine) that carry a signal generated by the dopant via singlet oxygen channeling.