Embodiments of the present invention are directed to methods, systems, and software for assessing contaminant quantities in a fluid. Fluid enters a reaction chamber. A controller then signals two different sheets with different reagents to move into the reaction chamber. One sheet contains reagents to form a contaminant byproduct or gas, while the other sheet is saturated with reagent that will have a photometric effect upon reacting with the contaminant byproduct or gas. After the photometric effect has occurred, the controller moves the reacted portion of the other reagent sheet into alignment with a photometric sensor. This photometric effect is calculated to contaminant concentration. The concentration is recorded and the data is transmitted to memory. The fluid sample in the chamber is drained and the remaining solid waste is collected onto the first reagent sheet. Both sheets are individually collected into separate controllable collectors.

The timing of the reaction of moisture-sensitive reagents for detecting the presence of analytes, e.g. leukocytes in urine samples, is used to detect when the reagents have been compromised by excess humidity. The ratio of light reflectance at wavelengths characteristic of the products of reaction between the reagents and the analyte and an infra-red reference dye is measured at two preset times after a urine sample has been applied to a test strip and used to determine whether the reagents have been compromised by excessive humidity. The presence of unusually dark samples is determined from the reflected light at 470 and 625 nm in order to confirm that the test strips are humidity-compromised.

A mobile device based multi-analyte testing analyzer for use in medical diagnostic monitoring and screening, and a method of manufacturing the same are disclosed. A reflectance based, colorimetric test strip reader for use with a mobile device having a jack plug receiving socket, said test strip reader adapted for removably receiving a test strip having a test strip longitudinal axis, comprising a housing; a jack plug operably coupled to and extending from said housing and adapted for operable coupling with said jack plug receiving socket; a test strip adapter including structure defining a test strip receiving channel; a light source oriented within said housing for directing light toward said test strip receiving channel to illuminate a test strip arranged within said test strip adapter; and a light sensor oriented within said housing to sense light reflected from a test strip carried by said test strip receiving channel.

A urine test device includes a case in which a guide is formed, a strip tray including a strip moving body formed to be slidably movable through the guide, a plurality of strip seating parts formed on the strip moving body, and a strip fixing part configured to fix the strip seated on each of the plurality of strip seating parts, a tray movement driving part configured to slidably move the strip tray, a sensing module supported by the case and including a plurality of light-emitting diodes (LEDs) configured to emit white light for testing toward the plurality of moving strips from above the plurality of strips and a plurality of image sensors configured to detect colors of the plurality of strips, and a control part configured to control the tray movement driving part to move the strip tray.

The present invention provides a multichannel label-free biosensing fiber-optic system, which comprises one or more light sources coupled into optical fibers, one or more optical fiber circuits for performing coupling or/and directional transmission of optical-fiber guided lightwaves, one or more optical-fiber-input and optical-fiber-output optical switches, a plurality of optical fibers provided with label-free optical sensing elements working in the reflection manner on the optical fiber ends, and the light detection parts, wherein the optical-fiber-input and optical-fiber-output optical switch is provided with a plurality of outputs and/or a plurality of inputs, and with the plurality of outputs and/or plurality of inputs, by the switching function, the reflected light from the label-free optical sensing elements working in the reflection manner on the designated optical fiber ends is received by the light detection part, so that multichannel sensing is realized.

Quantitative colorimetric carbon dioxide detection and measurement systems are disclosed. The systems can include a gas conduit, a colorimetric indicator adapted to exhibit a color change in response to exposure to carbon dioxide gas, a temperature controller operatively coupled to the colorimetric indicator and configured to control the temperature of the colorimetric indicator, an electro-optical sensor assembly including a light source or sources adapted to transmit light to the colorimetric indicator, and a photodiode or photodiodes configured to detect light reflected from the colorimetric indicator and to generate a measurement signal, and a processor in communication with the electro-optical sensor assembly. The processor can be configured to receive the measurement signal generated by the electro-optical sensor assembly and to compute a concentration of carbon dioxide based on the measurement signal. Methods for using the systems are also disclosed including providing a breathing therapy to a patient or user.

A hydrogen sensor for detecting hydrogen in a fluid in physical contact with the sensor comprises a sensing element, a first protection layer, provided to prevent contact of the sensing element with a sensor poisoning gas in the fluid, wherein the first protection layer comprises PMMA. Further, a hydrogen detection system, an electrical device having such a system and a method for producing a sensor are provided.

The invention relates to a sensor module (1) for multiparametric analysis of a medium (105) and to the uses thereof. The sensor module (1) according to the invention is characterised by a combination of photonic and non-photonic measurement principles with parameter-sensitive coatings (103) on a substrate (100). A plurality of properties of a medium (105) can be detected over wide parameter ranges, wherein the most suitable method can be used for the corresponding parameter, at least for example with regard to the accuracy, the long-term stability, the resolution, the reproducibility, the energy consumption, the manufacturing costs, the necessary space requirements.

A colorimetric sensor for detecting an analyte of interest that includes a metal layer disposed upon a substrate, a plurality of nanostructures, and a corresponding plurality of metal deposits spaced apart from the metal layer. The metal layer defines a plurality of holes, each nanostructure includes a first portion disposed within a respective hole, and each metal deposit is disposed upon a second portion of a respective nanostructure. The sensor also includes a molecularly imprinted polymer layer that may cover the metal layer, the nanostructures, and/or the metal deposits. The molecularly imprinted polymer layer defines a cavity shaped to receive the analyte of interest, and the sensor is configured such that, when an analyte contacts the molecularly imprinted polymer layer and becomes disposed within the cavity, an optical property of at least a portion of the sensor changes thereby to cause a detectable color change in and/or from the sensor.

It is proposed to use self-mixing interferometry for determining an absorption. The monitoring device for use in lateral flow testing for detecting presence or amount of an analyte in a liquid includes a housing, the housing including a carrier holder for holding a carrier for transport of the liquid; at least a first light source which is a resonant-cavity light source having a cavity; and an evaluation unit, operationally connected to at least the first light source for detecting a measurement signal. The first light source is structured and arranged to illuminate with light a test range in a test area of a carrier held in the carrier holder; and to couple back into the cavity of the first light source a portion of the light coming back from the test range.