The present disclosure relates to a measuring arrangement for measuring an ozone content in a measured medium, including: a first sensor surface and a second sensor surface; a first cover element adjacent the first sensor surface and including an ozone binder that binds ozone without releasing oxygen or any species further reacting to form oxygen; a second cover element adjacent the second sensor surface and including an ozone converter that reacts with ozone to form oxygen; a measuring sensor configured to generate a first measurement signal dependent on the oxygen concentration at the first sensor surface and a second measurement signal dependent on the oxygen concentration at the second sensor surface; and an electronic evaluation unit configured to determine the ozone content in the measured medium based on the first and the second measurement signals.

The present disclosure relates to an electrochemical sensor for determining a measurand correlating with a concentration of an analyte in a measuring fluid, comprising: a sensor membrane designed to be in contact with the measuring fluid for detecting measured values of the measurand; a probe housing which has at least one immersion region designed for immersion into the measuring fluid, wherein the sensor membrane is arranged in the immersion region of the probe housing; and a measurement circuit which is at least partially contained in the probe housing and is designed to generate and output a measurement signal dependent on the measurand, wherein the sensor membrane contains an optically detectable substance for marking the sensor membrane.

A self-supporting film (10) comprises a gas barrier layer (20); a semi-permeable layer (40); and an indicator material (30), preferably a colorimetric indicator material, is provided between the gas barrier layer (20) and the semi-permeable layer (40). The indicator material (30) is in direct contact with the gas barrier layer (20). The film (10) is particularly useful as an item of packaging, particularly in packaging for perishable materials.

Method and compositions using transition metal salts and/or ammonium chloride to liberate toxins and other molecules from cyanobacteria, useful for assaying for total cyanobacterial toxins in lakes, reservoirs and other waters.

In a sensor unit, a sensor element having an optical behavior that depends on at least one analyte is in diffusive contact with an auxiliary medium, which is present in a reservoir in the sensor unit, via a membrane. The reservoir and the membrane, on the one hand, and sensor element, on the other hand, can be removed from one another in order to place the sensor unit in a measurement state. The auxiliary medium can serve to wet the sensor element during storage of the sensor unit or also for calibrating the sensor element.

There is disclosed herein a device for determining the smoking status of a subject, wherein said device comprises a plurality of different specific binding molecules deposited to a solid phase to detect specifically the presence of two or three tobacco smoke exposure biomarkers in a biological sample, said biomarkers consisting of: (i) cotinine and total 4-(methylnitrosamino)-1-(3-, pyridyl)-1-butanol (NNAL); (ii) cotinine and N-acetyl-S-[2-carboxyethyl]-L-cysteine (CEMA); or (iii) cotinine and NNAL and CEMA.

An optochemical sensor unit including: an optical waveguide; a transmitting unit for emitting a first transmission signal for exciting a luminophore; a receiving unit for receiving a received signal comprising a signal component emitted by the excited luminophore; a measuring chamber for receiving a fluid, wherein the fluid includes magnetic microspheres; a membrane arranged between the measuring chamber and a measuring medium for exchanging an analyte between the measuring medium and the fluid in the measuring chamber, wherein the measuring diaphragm is impermeable to the magnetic microspheres; and an electromagnet for attracting magnetic microspheres to a sensor membrane with a fluid-contacting surface and/or to a fluid-contacting surface of the optical waveguide, or to a surface of a transparent substrate layer of the optical sensor unit that is connected to the optical waveguide.

The invention relates to a detector system suitable for detection of an aromatic hydrocarbon, comprising an organic polymeric sensor material that is permeable to the aromatic hydrocarbon, the sensor material comprising a molecular probe selected from the group of methanatoboron moieties. Further, the invention relates to the use of a detector system according to the invention for the detection of an aromatic hydrocarbon, preferably an aromatic hydrocarbon selected from the group of benzene, toluene and xylene.

A calibration method and related systems for colorimetric chemical assay and a fluid sensor apparatus using the same are provided. Reference measurements are taken from both a digital camera and a spectrometer. The digital camera is installed in the fluid sensor apparatus. Subsequently, color measurements from the digital camera are then converted and compared to prior spectrometric measurements to perform a colorimetric analysis.

Provided herein are devices, systems, and methods for measuring the presence of an analyte of interest in a sample. Certain embodiments of the present disclosure are related to culture measurement systems that include a culture vial and a sensor, wherein the sensor is a pH sensor, a responsive label, or an indicator compound, such that the sensor is incorporated into the culture vial for measurement of the pH of the sample.