A method for determining whether a testing specimen is supplied to a testing system, which comprises: a reaction tank in which the testing specimen reacts; a light source for emitting testing light into the reaction tank from one side of the reaction tank; and a photoelectric sensor that is placed on the side of the reaction tank opposite to the light source for receiving the testing light traveled through the reaction tank and that converts the received testing light into an electrical signal. Determining. The amount of the testing specimen to be added into the reaction tank is set so that the level of the testing specimen is above the light path of the testing light while the reaction tank is cleaned. Whether the testing specimen is supplied is determined based on the presence of change of the electrical signal output from the photoelectric sensor. determined

In a method for measuring luminescence of a biological sample utilizing two different luminescence reagents, the sample is agitated to improve mixing with the second luminescence reagent, allowing for a shorter delay time between injection of the second reagent and measurement of the resulting luminescence activity. The improved mixing may also allow for a shorter measurement time, thereby improving throughput when assaying a large number of samples.

In a method for measuring luminescence of a biological sample utilizing two different luminescence reagents, the sample is agitated to improve mixing with the second luminescence reagent, allowing for a shorter delay time between injection of the second reagent and measurement of the resulting luminescence activity. The improved mixing may also allow for a shorter measurement time, thereby improving throughput when assaying a large number of samples.

An apparatus for sensing a chemical of interest in a fluid of interest includes: a tube permeable to the chemical of interest, having a polymer, and configured to be disposed into the fluid of interest; and a reactant disposed in a hollow portion of the tube and configured to react with the chemical of interest causing a change to transmissiveness of light. The apparatus further includes: a light source configured to illuminate the reactant; a photodetector configured to detect light traversing the reactant; a processor coupled to the photodetector and configured to determine a rate of change of detected light in response to the chemical of interest reacting with the reactant in order to sense the chemical of interest; and a reactant purging system in fluid communication with the hollow portion and configured to purge out pre-existing reactant present in the hollow portion with new unreacted reactant.

Disclosed is a test strip device, comprising a strip body and a blocking element. The strip body has a first face and a second face. The strip body has an injection opening, a flow channel and a reaction receptacle. The injection opening reaches the first face, the flow channel is in fluid communication between the injection opening and the reaction receptacle, and the flow channel is in fluid communication with the injection opening through a flow channel opening. The blocking element is vertically movably disposed in the injection opening, and the blocking element selectively closes the flow channel opening. Therefore, the back flow of a sample can be prevented, so as to ensure chemical reaction of the sample and a reagent and thus improve accuracy of the test results.

Embodiments of the present disclosure pertain to a colorimetric system for detecting a substance, the colorimetric system that includes a first chemical container adapted for releasing a first chemical; a second chemical container adapted for releasing a second chemical; a flow modulation sheet adjacent each chemical container; and an encapsulation covering the flow modulation sheet and each chemical container, where the encapsulation comprises a window defining a target area of the filter paper such that the target area is adapted for applying the substance; where the flow modulation sheet comprises a design adapted for automatically controlling a first flow of the first chemical and a second flow of the second chemical to the target area after simultaneously releasing the first and second chemicals; and where the design comprises a first void disposed in the flow modulation sheet.

Disclosed is a test strip device, comprising a strip body and a blocking element. The strip body has a first face and a second face. The strip body has an injection opening, a flow channel and a reaction receptacle. The injection opening reaches the first face, the flow channel is in fluid communication between the injection opening and the reaction receptacle, and the flow channel is in fluid communication with the injection opening through a flow channel opening. The blocking element is vertically movably disposed in the injection opening, and the blocking element selectively closes the flow channel opening. Therefore, the back flow of a sample can be prevented, so as to ensure chemical reaction of the sample and a reagent and thus improve accuracy of the test results.

In a method for measuring luminescence of a biological sample utilizing two different luminescence reagents, the sample is agitated to improve mixing with the second luminescence reagent, allowing for a shorter delay time between injection of the second reagent and measurement of the resulting luminescence activity. The improved mixing may also allow for a shorter measurement time, thereby improving throughput when assaying a large number of samples.

Disclosed is a measurement apparatus for analyzing a cell contained in a specimen, comprising: a chamber for preparing a measurement sample in which the cell is stained with first and second fluorescent dyes contained in a reagent supplied from at least one reagent container; a liquid feeding section for feeding the reagent from the reagent container to the chamber via a liquid feeding tube provided between the reagent container and the chamber; and a detection section that acquires first and second signals each corresponding to fluorescence of a first wavelength and fluorescence of a second wavelength emitted from the cell stained with the first and second fluorescent dyes in response to irradiation of the measurement sample flowing in a flow cell with light; and an analysis section that analyzes the cell on the basis of the first and second signals.

Disclosed is a measurement apparatus for analyzing a cell contained in a specimen, comprising: a chamber for preparing a measurement sample in which the cell is stained with first and second fluorescent dyes contained in a reagent supplied from at least one reagent container; a liquid feeding section for feeding the reagent from the reagent container to the chamber via a liquid feeding tube provided between the reagent container and the chamber; and a detection section that acquires first and second signals each corresponding to fluorescence of a first wavelength and fluorescence of a second wavelength emitted from the cell stained with the first and second fluorescent dyes in response to irradiation of the measurement sample flowing in a flow cell with light; and an analysis section that analyzes the cell on the basis of the first and second signals.