A probe for measuring a sample solution includes an outer body configured to receive an operational amount of a reference solution, and a sensor assembly including an inner body at least a portion of which is located inside the outer body. A shield is positioned between the outer surface of the inner body and the inner surface of the outer body. The shield is configured to be in contact with the reference solution and extends above the top surface of the reference solution when the probe is filled with an operational amount of the reference solution.

The invention relates to a system for detecting one or more analytes in a sample. The system comprises a probe for insertion into the sample, the probe having a first electrochemical sensor configured to detect a first analyte in the sample, and a second electrochemical sensor configured to detect a second analyte in the sample. A first potentiostat is connected to the first electrochemical sensor and configured to perform a first electrochemical measurement with the first electrochemical sensor. Additionally, a second potentiostat is connected to the second electrochemical sensor and configured to perform a second electrochemical measurement with the second electrochemical sensor. The first potentiostat and the second potentiostat are electrically isolated from one another.

A heavy metal detector includes a housing composed of a top cover and a base, and a main machine and an electrolysis module arranged in the housing, wherein the main machine includes a main machine circuit, and the main machine circuit includes a main controller, a power supply module, a signal acquisition and processing module, an electrolysis module interface and a signal conversion module. The electrolysis module interface is configured to connect the electrolysis module and the signal acquisition and processing module; the signal acquisition and processing module is configured to receive a characteristic electrical signal output by the electrolysis module, and output a detection result to the main controller; and the main controller displays the detection result on a display module. Multiple electrolysis module interfaces are provided. The base is provided with a plurality of electrolysis module installation ports and stirring devices corresponding to the electrolysis module installation ports.

An all-electronic high-throughput detection system can perform multiple detections of one or more analyte in parallel. The detection system is modular, and can be easily integrated with existing microtiter plate technologies, automated test equipments and lab workflows (e.g., sample handling/distribution systems). The detection system includes multiple sensing modules that can perform separate analyte detection. A sensing module includes a platform configured to couple to a sample well. The sensing module also includes a sensor coupled to the platform. The sensing module further includes a first electrode coupled to the platform. The first electrode is configured to electrically connect with the sensor via a feedback circuit. The feedback circuit is configured to provide a feedback signal via the first electrode to a sample received in the sample well, the feedback signal based on a potential of the received sample detected via a second electrode.

The potentiometric sensor element comprises a measuring element and a shield housing permanently bonded to the measuring element, in which housing an electronic sensor unit is accommodated and which is sealed off against external influences. The electronic sensor unit is connected to a contactless interface adapted to exchange energy and signals with a corresponding contactless interface in an electronic base unit. The shield housing comprises an outer sleeve and an inner sleeve, accommodated within the outer sleeve, wherein the electronic sensor unit is accommodated in the inner sleeve and is surrounded there by a first casting compound. The filled inner sleeve is in turn bonded permanently to the outer sleeve by means of a second casting compound, which is different from the first casting compound.

The invention refers to a device and a method of quantification of analytes concentration, making use of a device that comprises an electrochemical cell (1) which contains the analyte, a load (2) which is connected in parallel to the electrochemical cell (1), and a readout unit (3), which is connected in parallel with the load (2). This includes the stages of quantification of the concentration of analytes, the charge transfer from the electrochemical cell (1) to the load (2), the determination of the voltage across the load (2) and the determination of the analyte concentration from the correlation between the analyte concentration and the voltage across the load (2).

An electric transmission mechanism according to one aspect of the present invention may include a tubular ring fixed to a shaft electively connected to an electrode, at least one brush slidably contacting with a circumferential surface of the ring, a bearing including an inner race fixed to the ring, and a housing which is fixed to an outer race of the bearing and accommodates a contact part of the ring and the brush therein.

Systems and methods for measuring pH of a drilling fluid in a downhole drilling environment are disclosed. The system includes wireless pH sensing devices dispersed in the drilling fluid and circulated through a borehole. The wireless pH sensing devices include a capsule shell for protecting internal electronics from harsh downhole conditions. The electronics include an electrolyte insulator semiconductor field-effect (EIS) pH sensor structure, a controller, RF communications unit and power supply. The pH sensing devices periodically measure the pH of the fluid while circulating through the borehole. Upon return of the sensors above ground, the pH measurements are wirelessly provided to a monitoring computer, prior to recirculating the sensors through the borehole.

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.

A method of operating a gas detection device including a capillary-limited, electrochemical gas sensor includes operating the gas sensor in a sensing mode during which a signal from the gas sensor is representative of a concentration of the analyte gas measured by the gas sensor and in an interrogation mode during which the gas sensor is electronically interrogated by applying an electric signal to the gas sensor to generate a non-faradaic current flow between a working electrode and a counter electrode without the application of a test gas, periodically entering the interrogation mode, measuring a parameter of a gas sensor output during the interrogation mode, comparing the measured parameter to one or more previously measured parameters, determining an operational state from the comparison, and returning the gas sensor to the sensing mode if the operational state is determined to be within a predetermined range.