A measuring electrode for chemical liquid in semiconductor process that measures a chemical liquid used for a semiconductor process comprises a first body having a first internal liquid chamber into which a first internal liquid is filled, and a flow tube for a part or all of which a responsive glass is used and that forms a flow channel where a chemical liquid as being a measuring object flows, wherein the flow tube is so arranged to penetrate the first body and the responsive glass makes contact with the first internal liquid in the first internal liquid chamber.

A water quality measurement apparatus is provided. The apparatus comprises an electrochemical cell, a pH sensor, a temperature sensor, a control circuit, a power source, a database, and a warning device. The electrochemical cell comprises a working electrode, a reference electrode, and a counter electrode. The control circuit provides predetermined adjustable potentials between the reference electrode and the working electrode and measures electrochemical currents between the working electrode and the counter electrode, to form a current diagram based on the predetermined adjustable potentials and the electrochemical currents. The database stores predetermined reference diagrams based on various pH values and temperatures, and is in communication with the control circuit. The warning device is configured to output warnings, wherein the control circuit triggers the warning device in the condition that the current diagram exceeds the predetermined reference diagram based on the same range of the pH values and the temperatures.

A gas sensor includes a sensor element having electrode pads, metal terminal members connected to the respective electrode pads, separators, and lead wires connected to the rear ends of the metal terminal members. Each metal terminal member has a forward locking portion and a rear locking portion provided at the forward and rear ends, respectively. The separator is composed of a forward separator and a rear separator connected to each other. The forward separator includes a first locking portion having a rearward-facing surface, and the rear separator includes a second locking portion having a forward-facing surface. The metal terminal member is held between the forward separator and the rear separator in a state in which the forward locking portion is in locking engagement with the rearward-facing surface and the rear locking portion is in locking engagement with the forward-facing surface.

A measuring electrode for chemical liquid in semiconductor process that measures a chemical liquid used for a semiconductor process comprises a first body having a first internal liquid chamber into which a first internal liquid is filled, and a flow tube for a part or all of which a responsive glass is used and that forms a flow channel where a chemical liquid as being a measuring object flows, wherein the flow tube is so arranged to penetrate the first body and the responsive glass makes contact with the first internal liquid in the first internal liquid chamber.

The present invention provides an electrolyte measuring device that makes it possible to detect failure in the device with a high degree of accuracy. The electrolyte measuring device has: an ion-selective electrode to which an ion solution including ions is supplied; a reference electrode; a measurement section to measure a potential difference between the ion-selective electrode and the reference electrode; and a current measurement section to measure an electric current flowing in the reference electrode.

A bend sensor comprising a sensor section in which a polymer electrolyte film is sandwiched between a pair of electrode films, wherein each of the electrode films contains: a block copolymer (Z) having a polymer block (S) composed of a structural unit derived from an aromatic vinyl compound, and containing an ion-conducting group, and an amorphous polymer block (T) composed of a structural unit derived from an unsaturated aliphatic hydrocarbon; and a conducting particle; which block copolymer (Z) forms a lamellar structure, which bend sensor therefore allows generation of enhanced voltage between the electrode films when deformation of the sensor occurs as it follows movement of an object, is provided.

A bend sensor comprising a sensor section in which a polymer electrolyte film is sandwiched between a pair of electrode films, wherein each of the electrode films contains: a block copolymer (Z) having a polymer block (S) composed of a structural unit derived from an aromatic vinyl compound, and containing an ion-conducting group, and an amorphous polymer block (T) composed of a structural unit derived from an unsaturated aliphatic hydrocarbon; and a conducting particle; which block copolymer (Z) forms a lamellar structure, which bend sensor therefore allows generation of enhanced voltage between the electrode films when deformation of the sensor occurs as it follows movement of an object, is provided.

An electrochemical sensor is used in a state of being immersed in water to be inspected for water quality inspection. The electrochemical sensor includes a working electrode, a reference electrode, a first counter electrode, and a second counter electrode. The working electrode, the reference electrode, the first counter electrode, and the second counter electrode are electrically isolated from each other.

An electrochemical sensor is used in a state of being immersed in water to be inspected for water quality inspection. The electrochemical sensor includes a working electrode, a reference electrode, a first counter electrode, and a second counter electrode. The working electrode, the reference electrode, the first counter electrode, and the second counter electrode are electrically isolated from each other.

The present disclosure relates to an amperometric sensor for measuring free chlorine, which sensor comprises:

an elongate body with a tip, wherein the circumferential surface of the body constitutes a counter electrode;

a reference electrode having a silver/silverchloride electrode surface arranged on the tip of the elongate body; and

a working electrode having a gold electrode surface arranged on the tip of the elongate body wherein the gold electrode surface is composed out of a string of electrically connected, spaced apart surface parts.