Abstract: The present invention intends to enable light path length to be kept the same between sample measurement and reference measurement and thereby improve measurement accuracy, and is an optical analyzer that analyzes a sample flowing through a pipe having translucency. In addition, the optical analyzer includes: a light source unit that has a light source and a condenser lens; a light detection unit that detects light of the light source unit; and a support mechanism that movably supports the light source unit and the light detection unit. Further, the support mechanism moves the light source unit and the light detection unit between a sample measurement position and a reference measurement position.

Abstract: A liquid analyzer is one that performs analysis in a state of being immersed in a flowing analysis target liquid, and in order to simply make a good/bad determination and increase reliability, includes: a sensor adapted to, in a state where a responsive membrane is immersed in the flowing analysis target liquid, sense a predetermined component contained in the analysis target liquid; an analysis mechanism adapted to analyze the analysis target liquid with use of voltage generated in the sensor; and a resistance measurement mechanism adapted to, in the state where the responsive membrane is immersed in the flowing analysis target liquid, apply DC voltage to the responsive membrane to measure the resistance of the responsive membrane.

Abstract: An optical measurement cell including first and second translucent members, which sandwich an internal space storing test liquid, are configured so that light incident on the first translucent member passes through the internal space and is emitted from the second translucent member. The cell includes a first holding member that holds down the circumference of a light transmission area on an outward surface of the first translucent member; a second holding member that holds down the circumference of a light transmission area on an outward surface of the second translucent member; and seal members that are respectively interposed between the first translucent and holding members and between the second translucent and holding members. In addition, areas excluding parts of surfaces of the respective translucent members are coated with coated films, and the end parts of the coated films are positioned on light transmission area sides of the seal members.

Abstract: A main object of the present invention is to provide a membrane covered type peracetic acid concentration meter that can prevent various common problems, including problems that occur in the event of an internal solution leak into a sample solution. The membrane covered type peracetic acid concentration meter adapted to measure the concentration of peracetic acid in the sample solution includes: a membrane that allows peracetic acid to permeate; and the internal solution that dissolves peracetic acid having permeated the membrane. In addition, as the internal solution, a buffer solution having a buffering action on hydrogen ion concentration is used.

Abstract: An endoscope reprocessor includes a concentration sensor including a concave section in which a sensing section is housed and a permeable membrane configured to cover the concave section, a pressure resistant container in which the concentration sensor is housed, a medicinal-solution lead-in section configured to introduce a medicinal solution into the pressure resistant container, and a pressure adjusting section configured to adjust pressure such that an internal pressure of the concave section is low compared with an internal pressure of the pressure resistant container.

Abstract: An endoscope reprocessor includes a concentration sensor including a concave section in which a sensing section is housed and a permeable membrane configured to cover the concave section, a medicinal solution tank, to an inside of which at least the permeable membrane is exposed and on the inside of which a disinfection solution is stored, and a heating section configured to heat at least the permeable membrane.

Abstract: In order to avoid an electrode from disturbing a flow of a fluid in a flow channel in case that the electrode of an electric conductivity meter is arranged in the flow channel, the electric conductivity meter comprises two tubular electrodes inside of each of which respectively formed is an inner flow channel where the fluid flows, and an electrode holder that communicates each of the inner flow channels of the two electrodes and that holds the two electrodes. The electrode holder holds the two electrodes by making an engagement with each outer peripheral surface of mutually facing axial direction end parts of the two electrodes.

Abstract: In order that a temperature of a measurement object whose non-transmission wavelength range is narrow, such as isopropyl alcohol can be measured highly accurately without increasing the size of a radiation thermometer, the radiation thermometer includes an infrared detection element to detect infrared ray emitted from the measurement object. The radiation thermometer is designed to measure the temperature of the measurement object on the basis of intensity of infrared ray detected by the infrared detection element. The radiation thermometer further includes a filter group made up of a plurality of infrared filters arranged on an optical path of infrared ray introduced into the infrared detection element. The filter group permits transmission of at least infrared ray in each of a first wavelength range and a second wavelength range which are not overlapped with each other.

Abstract: To measure target component concentration in a liquid with higher accuracy without any dedicated apparatus or skill, a method is adapted to include: receiving a successive measurement value obtained by performing successive measurement of the target component concentration with use of a first measurement device immersed in the liquid; receiving a batch measurement value obtained by, with use of a second measurement device, performing batch measurement of the target component concentration in a part sampled from the liquid; and, when the batch measurement value is received, successively calculating a correlation value indicating the correlation between multiple successive measurement values and multiple batch measurement values respectively obtained in mutually corresponding multiple times of successive measurement and multiple times of batch measurement.

Abstract: In order to improve the endurance of this internal solution for a reference electrode beyond that in the prior art, the solution is made to contain a copolymerized material of a crosslinker having a plurality of non-acrylamide functional groups, and a non-acrylamide monofunctional hydrophilic monomer.

Abstract: The present invention is one that makes it possible to continuously measure the resistivity of a liquid sample with accuracy as well as preventing the deterioration of the liquid sample associated with measurement, such as change in quality, and relates to a resistivity-measuring circuit C that measures the resistivity in order to sense the deterioration of the liquid sample. The resistivity-measuring circuit C is one that calculates the resistivity of the liquid sample by detecting voltage generated between an outer electrode and an inner electrode, and between the outer electrode and the inner electrode, applies square wave AC voltage having an amplitude of 1 V to 42 V and a frequency of 0.5 Hz to 30 Hz.

Abstract: In order to avoid an electrode from disturbing a flow of a fluid in a flow channel in case that the electrode of an electric conductivity meter is arranged in the flow channel, the electric conductivity meter comprises two tubular electrodes inside of each of which respectively formed is an inner flow channel where the fluid flows, and an electrode holder that communicates each of the inner flow channels of the two electrodes and that holds the two electrodes. The electrode holder holds the two electrodes by making an engagement with each outer peripheral surface of mutually facing axial direction end parts of the two electrodes.

Abstract: An endoscope reprocessor includes a concentration sensor including a concave section in which a sensing section is housed and a permeable membrane configured to cover the concave section, a medicinal solution tank, to an inside of which at least the permeable membrane is exposed and on the inside of which a disinfection solution is stored, and a heating section configured to heat at least the permeable membrane.

Abstract: An endoscope reprocessor includes a concentration sensor including a concave section in which a sensing section is housed and a permeable membrane configured to cover the concave section, a pressure resistant container in which the concentration sensor is housed, a medicinal-solution lead-in section configured to introduce a medicinal solution into the pressure resistant container, and a pressure adjusting section configured to adjust pressure such that an internal pressure of the concave section is low compared with an internal pressure of the pressure resistant container.

Abstract: In order to improve measurement accuracy by accurately calibrating sensitivity of a dissolved oxygen meter without impairing easiness in calibration, the present invention includes a dissolved oxygen measuring device that includes a cell to be loaded with a sample solution, and a dissolved oxygen meter that is attached to the cell and measures an oxygen concentration in the sample solution; and a mode switching mechanism to switch between a measurement mode, in which a sensor surface of the dissolved oxygen meter is substantially in contact with the sample solution in the cell, and a calibration mode, in which the sensor surface is substantially not in contact with the sample solution in the cell, by feeding air into the cell through a feed port disposed on the cell, and by discharging part of the sample solution through a discharge port disposed on the cell.

Abstract: A measuring device comprises a guard electrode that is arranged around a cathode, reduces oxygen that is not from an oxygen permeable membrane, and inhibits the oxygen from reaching the cathode. The guard electrode is electrically connected to an anode through a resistor having a prescribed resistance.

Abstract: A computer-implemented method for determining a water treatment parameter includes receiving, by a computer, measurements of a fluorescence emission spectrum of a water sample including a first peak emission wavelength and at least a second peak emission wavelength, emitted in response to an excitation wavelength, receiving, by the computer, an absorbance measurement obtained at the excitation wavelength of the water sample, determining, using the computer, a ratio of the measurements at either the second peak emission wavelength, or a sum of measurements at a plurality of peak emission wavelengths including at least the first peak emission wavelength and the second peak emission wavelength, to the first peak emission wavelength, and calculating, using the computer, a value for the water treatment parameter based on a combination of at least the ratio and the absorbance measurement.

Abstract: In order to improve measurement accuracy by accurately calibrating sensitivity of a dissolved oxygen meter without impairing easiness in calibration, the present invention includes a dissolved oxygen measuring device that includes a cell to be loaded with a sample solution, and a dissolved oxygen meter that is attached to the cell and measures an oxygen concentration in the sample solution; and a mode switching mechanism to switch between a measurement mode, in which a sensor surface of the dissolved oxygen meter is substantially in contact with the sample solution in the cell, and a calibration mode, in which the sensor surface is substantially not in contact with the sample solution in the cell, by feeding air into the cell through a feed port disposed on the cell, and by discharging part of the sample solution through a discharge port disposed on the cell.

Abstract: The present invention is one that makes it possible to continuously measure the resistivity of a liquid sample with accuracy as well as preventing the deterioration of the liquid sample associated with measurement, such as change in quality, and relates to a resistivity-measuring circuit C that measures the resistivity in order to sense the deterioration of the liquid sample. The resistivity-measuring circuit C is one that calculates the resistivity of the liquid sample by detecting voltage generated between an outer electrode and an inner electrode, and between the outer electrode and the inner electrode, applies square wave AC voltage having an amplitude of 1 V to 42 V and a frequency of 0.5 Hz to 30 Hz.