The present disclosure relates to a method for manufacturing a sensor cap with at least one main body and a membrane for an optochemical or electrochemical sensor for determining and/or monitoring the concentration of an analyte in a measuring medium, a corresponding sensor cap, and a corresponding sensor. In one aspect of the present disclosure, a permeable membrane is provided with a surface for contacting the measuring medium, as well as a main body with at least one sector for connecting to the membrane. At least part of the membrane and main body are welded, wherein the membrane is at least partially applied to the at least one sector of the main body and a connection between the main body and membrane is sealed against the measuring medium.

An sensor (2) based on an optical-sensing technique measures gaseous or dissolved analytes in a measurement medium (4). The sensor has a sensor housing (6) and an optochemical sensor element (20, 220) arranged within the sensor housing. The optochemical sensor element (220) has a substrate (222), a sensing layer (224) and a barrier layer (230). The barrier layer is arranged to protect the optochemical sensor element from interfering substances (234) present in the measurement medium.

A photonic gas sensor and a method for producing a photonic gas sensor are disclosed. In an embodiment a photonic gas sensor includes a component housing with at least one cavity, a radiation-emitting semiconductor chip arranged in the cavity and configured to transmit electromagnetic radiation in a first wavelength range, a radiation-detecting semiconductor chip arranged in the cavity and configured to detect electromagnetic radiation in a second wavelength range and an active sensor element having a fluorescent dye configured to emit electromagnetic radiation in the second wavelength range upon being excited by electromagnetic radiation in the first wavelength range, wherein an intensity of the emitted electromagnetic radiation in the second wavelength range changes reversibly in presence of a gas to be detected.

The present disclosure relates to a method for manufacturing a sensor cap with at least one main body and a membrane for an optochemical or electrochemical sensor for determining and/or monitoring the concentration of an analyte in a measuring medium, a corresponding sensor cap, and a corresponding sensor. In one aspect of the present disclosure, a permeable membrane is provided with a surface for contacting the measuring medium, as well as a main body with at least one sector for connecting to the membrane. At least part of the membrane and main body are welded, wherein the membrane is at least partially applied to the at least one sector of the main body and a connection between the main body and membrane is sealed against the measuring medium.

A sensor for use in detecting an analyte, the sensor comprising a monofibre waveguide and a reactive film comprising a nanoporous material disposed at a distal end of the monofibre waveguide. The sensor is rugged, highly sensitive, and allows for rapid detection of analytes in very low amounts.

The molecule detecting apparatus of an embodiment includes a light source 31, a fluorescent layer 42 emitting different fluorescence depending on the kind of a target molecule 60 captured when being irradiated with light from the light source 31, a photodetector 32 configured to detect fluorescence, and the photodetector 32 is an array of avalanche photodiodes operating in Geiger mode.

A gas detection element for detection of a measurement target gas is provided. The gas detection element includes a gas detection layer including a chemochromic pigment; and a spacer. The spacer is permeable to the measurement target gas, is disposed on a first surface of the gas detection layer, and has an area smaller than an area of the gas detection layer.

An aqueous system comprises a pH-responsive visual indicator and a volatile pH modifier. A method of producing a visual signal comprises evaporation of a volatile pH modifier from a system further comprising a pH-responsive visual indicator.

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.

A system is for estimating a remaining lifetime of an aldehyde filter. The system comprises aa aldehyde filter (14) through which at least a portion of the gas is to be passed for removing aldehyde (10) from the gas (12) and a detecting medium (16) through which at least a portion of the gas is to be passed comprising photoluminescent carbon-based dots (18), a light source for emitting an excitation light (E) through the detecting medium for exciting the carbon-based dots which thereby emit luminescent light (L), a detector (28) for detecting the luminescent light (L), the luminescent light (L) having a luminescence property; and a controller (30) for determining information relating to intensity of a red, a green or a blue component of the luminescence property and estimating a remaining lifetime of the aldehyde filter from the determined information.