A monitoring device for a system for measuring process variables, in particular in liquid analysis, which measuring system comprises a sensor (2) for recording a process variable and a contactless, inductive plug-in connection (5) between the sensor (2) and a cable (6) for preferably bidirectional transfer of digital signals between the sensor (2) and a remote transducer (7), the monitoring system comprising: a coupling device (17) that can be placed on the plug-in connection (5) and operates without contact to record the signals transferred via the plug-in connection (5), an evaluation device (21) for evaluating the recorded signals, and a display device (22) for presenting the evaluated signals.

This disclosure provides techniques for extending useful life of a reference electrode, as well as a novel voltametric system and measurement cell design and related chemistries. An automated, repeatable-use system features a reference electrode that directly immerses a metallic conductor into an analyte, with electrolytes (e.g., chlorides) used for measurement being separately added and removed for each measurement cycles; the metallic conductor can optionally be left exposed to clean dry air in between measurements. In one implementation, the system can be restricted to application with specific analytes (e.g., ground water) that are known in advance to be free of substances that could degrade reference electrode use or lifetime. Cleaning solutions can optionally be used that would not be practical with conventional (insulated) reference electrode designs. In another embodiment, a measurement cell can be configured to receive separated electrode modules, permitting independent cleaning/removal of the working electrode (or other electrodes).

A test time for measuring hydrogen diffusion in a steel material is improved. The reproducibility of a position where hydrogen exists in the steel material is improved. A control terminal controls a solution supply/discharge control device, a gas supply control device, a first potentiostat/galvanostat, and a second potentiostat/galvanostat on the basis of a predefined procedure, so that a plurality of processing steps, which are performed for analyzing hydrogen diffused from the inside to the surface of a steel material to be measured, are performed continuously. Further, the processing of inactivating the surface of the steel material to be measured is performed before the main processing using a metal ion replacement method, or an inert gas is injected into the solution during the main processing.

A test time for measuring hydrogen diffusion in a steel material is improved. The reproducibility of a position where hydrogen exists in the steel material is improved. A control terminal controls a solution supply/discharge control device, a gas supply control device, a first potentiostat/galvanostat, and a second potentiostat/galvanostat on the basis of a predefined procedure, so that a plurality of processing steps, which are performed for analyzing hydrogen diffused from the inside to the surface of a steel material to be measured, are performed continuously. Further, the processing of inactivating the surface of the steel material to be measured is performed before the main processing using a metal ion replacement method, or an inert gas is injected into the solution during the main processing.

A sensor apparatus comprising a portable sensor body. The sensor body includes a support with one or more sensing electrodes, and electric connections connecting to the electrodes. The apparatus further includes a storage container, designed to receive at least a part of the support that includes one or more of the electrodes, for storing the sensor body. The container comprises a deformable wiper. The wiper is shaped correspondingly with the support and electrodes thereof, to wipe liquid (and/or other materials contained therein) off the support responsive to inserting the latter in the container and, conversely, responsive to de-inserting the support from the container. Mutually corresponding parts of the sensor body and the container may form a fastener, so as to be able to create a non-permanent joint between the sensor body and the container responsive to the sensor body being fully inserted in the container.

A self-vibrating pH probe comprise a housing containing an electronic assembly to which is coupled a vibration source element so that at least a portion of vibrations caused by the vibration source element propagate to the electronic assembly, the vibration source element being controllable for at least on/off operation. The self-vibrating pH probe further comprising a pH probe member having a probe tip at a first end, the probe member extending from the housing and mechanically and electrically coupled by a second end to the electronic assembly so that at least a portion of vibrations propagating to the electronic assembly further propagate to the probe tip; and further including a processor coupled to the electronic assembly for coordinating operation of the vibration source element and operation of the pH probe member.

In a device that measures biopotentials of cells in a solution, the solution is controlled at a constant temperature. A measurement device includes a substrate, a sensing control circuit, a temperature sensor, a front surface side heat radiating unit, a back surface side heat radiating unit, and a temperature control unit. A plurality of electrodes each detecting a potential in the solution is arranged on the front surface of the substrate. The sensing control circuit is arranged on the substrate and controls detection of potentials at the plurality of electrodes. The temperature sensor is arranged on the substrate and detects a temperature of the solution. The front surface side heat radiating unit is arranged on the front surface side of the substrate and radiates heat. The back surface side heat radiating unit is arranged on the back surface side that is a surface different from the front surface of the substrate, and radiates heat. The temperature control unit controls the temperature of the solution on the basis of the temperature detected by the temperature sensor.

A miniaturized electrochemical cell (2) comprising a main body (20) comprising a tip (21) wherein inlet (41) and outlet (51) hollow conduits of millimeter-size diameter are hollowed out separated by a partition wall (200) integral with the main body (20) in which an electrolytic liquid solution (10) flows, in a space between the tip (21) and a surface (90) of a conductor material to be analyzed (9) is identified a millimeter-size chamber for redox reactions (6), the tip (21) of the main body (20) comprises a millimeter-size opening (210) of millimetric dimension in communication with said millimeter-size chamber for redox reactions (6).

A miniaturized electrochemical cell (2) comprising a main body (20) comprising a tip (21) wherein inlet (41) and outlet (51) hollow conduits of millimeter-size diameter are hollowed out separated by a partition wall (200) integral with the main body (20) in which an electrolytic liquid solution (10) flows, in a space between the tip (21) and a surface (90) of a conductor material to be analyzed (9) is identified a millimeter-size chamber for redox reactions (6), the tip (21) of the main body (20) comprises a millimeter-size opening (210) of millimetric dimension in communication with said millimeter-size chamber for redox reactions (6).

The invention relates to a closure for an electrochemical reaction vessel, in particular a potentiostat, the closure comprising: a holder for holding electrodes arranged at an inner side of the closure such that, when the closure is attached to a reaction vessel, electrodes held by the holder extend into an interior space of the reaction vessel and into an electrolyte contained in the reaction vessel; and a plurality of contacts arranged at an outer side of the closure for providing electrical contacts with the electrodes.