Abstract: Provided are a concentration-factor measurement device and method for accurately calculating a concentration factor of circulating water, and a method for measuring a water-quality index value of the circulating water. The concentration-factor measurement device includes a light-absorbance measurement unit (1) for measuring absorbance by irradiating each of cells (12A-12C) with light, and an electrode measurement unit (2) equipped with electrodes (16, 17) that are inserted into a water sample in a container (20). For each item of water quality, the device calculates a concentration factor on the basis of a measured value measured when the water sample (W) is the circulating water, and a measured value measured when the water sample (W) is makeup water. A plurality of concentration factors are calculated on the basis of the measured values for plural items of water quality. Hence an accurate concentration factor can be obtained.

Abstract: A system for calculating a concentration of a water treatment chemical includes a water analyzer, databases storing information regarding a chemical component of the water treatment chemical, a server sending the information stored in the database, and a communication device sending the information acquired from the server to the water analyzer.

Abstract: A facility management system quickly creates information required for maintenance or the like of a water treatment facility, after water is sampled at the water treatment facility. The facility management system includes a management center including an operation database in which information indicating an operating status of a water treatment facility is stored, a portable water quality analyzer configured to perform water quality analysis on water taken from the water treatment facility, and a communication apparatus configured to acquire an analysis result from the portable water quality analyzer and wirelessly transmit the analysis result. The management center receives the analysis result transmitted from the communication apparatus, creates information indicating the operating status of the water treatment facility, by using the analysis result, and registers the information in the operation database.

Abstract: A system for calculating a concentration of a water treatment chemical includes a water analyzer, databases storing information regarding a chemical component of the water treatment chemical, a server sending the information stored in the database, and a communication device sending the information acquired from the server to the water analyzer.

Abstract: A bicycle pedaling force detector is basically provided with that basically includes a first sensor circuit, a wireless communicator and a first electrical connection member. The first sensor circuit is coupled to a first housing that is configured to be mounted to a crank assembly. The wireless communicator is coupled to a second housing that is configured to be detachably mounted to a crank assembly. The second housing is a separate member from the first housing. The first electrical connection member is configured to electrically connect the wireless communicator and the first sensor circuit.

Abstract: A bicycle crank assembly comprises a crank axle, a first crank arm, and a battery holding structure. The crank axle comprises a cavity and a first end portion. A battery unit is to be provided in the cavity. The first end portion has a first end opening which is in communication with the cavity. The first crank arm is configured to be mounted on the first end portion. The battery holding structure is configured to hold the battery unit in the cavity. The battery holding structure is configured so that the battery unit is replaceable through the first end opening in a state where the first crank arm is mounted on the first end portion of the crank axle.

Abstract: Provided are a concentration-factor measurement device and method for accurately calculating a concentration factor of circulating water, and a method for measuring a water-quality index value of the circulating water. The concentration-factor measurement device includes a light-absorbance measurement unit (1) for measuring absorbance by irradiating each of cells (12A-12C) with light, and an electrode measurement unit (2) equipped with electrodes (16, 17) that are inserted into a water sample in a container (20). For each item of water quality, the device calculates a concentration factor on the basis of a measured value measured when the water sample (W) is the circulating water, and a measured value measured when the water sample (W) is makeup water. A plurality of concentration factors are calculated on the basis of the measured values for plural items of water quality. Hence an accurate concentration factor can be obtained.

Abstract: A bicycle pedaling force detector is basically provided with that basically includes a first sensor circuit, a wireless communicator and a first electrical connection member, The first sensor circuit is coupled to a first housing that is configured to be mounted to a crank assembly. The wireless communicator is coupled to a second housing that is configured to be detachably mounted to a crank assembly. The second housing is a separate member from the first housing. The first electrical connection member is configured to electrically connect the wireless communicator and the first sensor circuit.

Abstract: Provided is a device for measuring the concentration of a dissolved component, whereby the concentration of a plurality of types of dissolved components in water can be measured easily and with good precision. A device for measuring the concentration of a dissolved component has: a cell assembly 3 in which a plurality of cells 1 are connected by a joint member 2 and integrated, and a measurement reagent is accommodated in each of the cells 1; and a measuring main body 5 having a measurement unit (light-emitting element 8 and light-receiving element 9) for measuring transmittance and absorbance, the cells 1 of the cell assembly 3 being inserted into the measurement unit. A cap 4 is detachably mounted to each cell 1.

Abstract: A facility management system quickly creates information required for maintenance or the like of a water treatment facility, after water is sampled at the water treatment facility. The facility management system includes a management center 40 including an operation database 44 in which information indicating an operating status of a water treatment facility 1 is stored, a portable water quality analyzer 20 configured to perform water quality analysis on water taken from the water treatment facility 1, and a communication apparatus 30 configured to acquire an analysis result from the portable water quality analyzer 20 and wirelessly transmit the analysis result. The management center 40 receives the analysis result transmitted from the communication apparatus 30, creates information indicating the operating status of the water treatment facility 1, by using the analysis result, and registers the information in the operation database 44.

Abstract: A bicycle crank assembly comprises a crank axle, a first crank arm, and a battery holding structure. The crank axle comprises a cavity and a first end portion. A battery unit is to be provided in the cavity. The first end portion has a first end opening which is in communication with the cavity. The first crank arm is configured to be mounted on the first end portion. The battery holding structure is configured to hold the battery unit in the cavity. The battery holding structure is configured so that the battery unit is replaceable through the first end opening in a state where the first crank arm is mounted on the first end portion of the crank axle.

Abstract: The method of using an amine compound represented by the formula NH2—(CH2)m—O—(CH2)n—OH, where each of m and n is an integer of 1 to 3, as a boiler anti-corrosive.

Abstract: The method of using an amine compound represented by the formula NH2—(CH2)m—O—(CH2)n—OH, where each of m and n is an integer of 1 to 3, as a boiler anti-corrosive.

Abstract: The boiler anti-corrosive of the present invention contains an amine compound represented by formula (1): NH2—(CH2)m—O—(CH2)n—OH??(1) (wherein each of m and n is an integer of 1 to 3), or contains an oxygen scavenger and the amine compound represented by formula (1). The anti-corrosive is generally used in a boiler operated with a superheater or a steam turbine, or in such a boiler to which treated water is fed, and can more effectively maintain the pH of boiler water and can prevent corrosion not only of the boiler tank but also in the entire boiler system including a feed-condensate system, without adding a large amount of phosphate salt or elevating the Na/PO4 mole ratio to 3 or higher.