A measuring device includes: a first electrode immersed in sample water stored in a measuring tank; a second electrode immersed in the sample water; and a controller that: causes a power source to flow a current through the sample water between the first electrode and the second electrode; detects, based on a first digital signal, an interruption whereby an analog signal fluctuates by no less than a predetermined value; and calculates, based on a second digital signal, a concentration of a measurement target in the sample water. The first digital signal is acquired by sampling the analog signal with a first sampling period. The analog signal is based on the current flowing through the sample water. The second digital signal is acquired by sampling the analog signal with a second sampling period that is longer than the first sampling period.

An embodiment provides a method for stirring a sample in a cell, including: providing a cell comprising a sample chamber; placing a boron-doped diamond electrode on an inner surface of the sample chamber, placing a removable stir bar in the sample chamber, the removable stir bar directly contacting and touching the boron-doped diamond electrode; and wherein the stir bar can be operated to rotate within the sample chamber upon the boron-doped diamond electrode. Other aspects are described and claimed.

A water testing and measuring system is disclosed including a water generator configured to generate water by extracting water vapor from ambient air. A compound generator is configured to apply a compound to the water generated by the water generator. A processor is in communication with the water generator and the compound generator. A measurement device is in communication with the water generator, the compound generator and the processor.

A measuring device includes: a first electrode and a second electrode immersed in sample water stored in a measuring tank; a motor that rotates the first electrode; and a controller that operates, based on measurement results of current flowing through the sample water, in a measuring mode. In the measuring mode, the controller calculates a concentration of a measurement target in the sample water. The motor changes a rotational velocity of the motor.

A measuring device includes: a first electrode and a second electrode immersed in sample water stored in a measuring tank; a motor that rotates the first electrode; and a controller that operates, based on measurement results of current flowing through the sample water, in a measuring mode. In the measuring mode, the controller calculates a concentration of a measurement target in the sample water. The motor changes a rotational velocity of the motor.

An electrical stability testing device includes a cup configured to receive a fluid sample. The testing device also includes a pair of electrodes positioned at least partially within the cup. The electrodes are spaced apart from one another by a predetermined gap. The electrodes are configured to have the fluid sample positioned within the predetermined gap while performing an ES test on the fluid sample in the cup. The testing device also includes a wiper positioned at least partially within the cup. The wiper is configured to pass between the electrodes after the ES test has concluded. A width of the wiper is greater than the predetermined gap between the electrodes. The wiper is configured to deform as the wiper passes through the predetermined gap such that the width becomes substantially equal to the predetermined gap and sides of the wiper contact ends of the electrodes to clean the electrodes.

An electrical stability testing device includes a cup configured to receive a fluid sample. The testing device also includes a pair of electrodes positioned at least partially within the cup. The electrodes are spaced apart from one another by a predetermined gap. The electrodes are configured to have the fluid sample positioned within the predetermined gap while performing an ES test on the fluid sample in the cup. The testing device also includes a wiper positioned at least partially within the cup. The wiper is configured to pass between the electrodes after the ES test has concluded. A width of the wiper is greater than the predetermined gap between the electrodes. The wiper is configured to deform as the wiper passes through the predetermined gap such that the width becomes substantially equal to the predetermined gap and sides of the wiper contact ends of the electrodes to clean the electrodes.

In order to provide a method for cleaning, conditioning, calibration, adjustment and conditioning of an amperometric sensor of a measuring device for determining a content substance in an electrolyte, with a measuring chamber, sealed by a selectively permeable membrane, containing the electrolyte, in which the working electrode and a reference electrode connected electrically with the working electrode are arranged, wherein the membrane is permeable to the content substance which is to be determined, wherein the determination of the content substance takes place during a measuring interval in that a voltage is applied between the working electrode and reference electrode, the current which flows via the electrical connection between working electrode and reference electrode is measured and the content substance deduced from the measured current, said method achieving a comparable or even a better cleaning and conditioning effect than the methods known from the prior art, but for which a simpler equipment set-up is sufficient, a method is described which is characterised in that a conditioning agent is generated in the measuring device, wherein either an oxidising agent which is reduced at the working electrode or a reducing agent which is oxidised at the working electrode is used as conditioning agent.

In order to provide a method for cleaning, conditioning, calibration, adjustment and conditioning of an amperometric sensor of a measuring device for determining a content substance in an electrolyte, with a measuring chamber, sealed by a selectively permeable membrane, containing the electrolyte, in which the working electrode and a reference electrode connected electrically with the working electrode are arranged, wherein the membrane is permeable to the content substance which is to be determined, wherein the determination of the content substance takes place during a measuring interval in that a voltage is applied between the working electrode and reference electrode, the current which flows via the electrical connection between working electrode and reference electrode is measured and the content substance deduced from the measured current, said method achieving a comparable or even a better cleaning and conditioning effect than the methods known from the prior art, but for which a simpler equipment set-up is sufficient, a method is described which is characterised in that a conditioning agent is generated in the measuring device, wherein either an oxidising agent which is reduced at the working electrode or a reducing agent which is oxidised at the working electrode is used as conditioning agent.

Methods of maintaining accuracy in the measurement of one or more parameters of industrial water in industrial water systems are provided. The methods include the use of physical and/or chemical procedures to prevent and/or remove deposition from one or more surfaces utilized in measurement of the one or more parameters. The deposition may be caused by, for example, corrosion, fouling, or microbiological growth.