Disclosed in the present invention is an enzyme-free glucose detection chip, including: a substrate; a detection portion, disposed on an end surface of the substrate; a plurality of protrusions, disposed at the detection portion; a conductive layer, disposed on a surface of the substrate having the protrusions; and a plurality of gold nanoparticles, dispersed on surfaces of the protrusions. In the enzyme-free glucose detection chip disclosed in the present invention, protrusions having gold nanoparticles are used as electrodes, are structures on a micrometer scale and a nanometer scale, and can directly react with glucose without any glucose oxidase or/and any medium.

An electrocardiography patch is provided. A backing includes two rounded ends connected by a middle section that is narrower than the two rounded ends. An electrode is positioned on a contact surface of the backing on each rounded end. A circuit trace is electrically coupled to each of the electrodes. A battery is positioned on an outer surface of the backing, opposite the contact surface, on one of the rounded ends.

An electrocardiography monitor is provided. A sealed housing includes one end wider than an opposite end of the sealed housing. Electronic circuitry is provided within the sealed housing. The electronic circuitry includes an electrographic front end circuit to sense electrocardiographic signals and a micro-controller interfaced to the electrocardiographic front end circuit to sample the electrocardiographic signals. A buzzer within the housing outputs feedback to a wearer of the sealed housing.

An electrochemical sensor array for detecting analytes in water, including a frame; a plurality of sensor electrodes each mounted to the frame, including a free chlorine working electrode including a gold thin film and having a free chlorine sensing surface to be exposed to the water; and a reference electrode including a silver thin film and a silver and silver chloride layer and having a reference sensing surface to be exposed to the water. A method of manufacturing an electrochemical sensor array for detecting analytes in water, including forming a free chlorine electrode, including forming a gold thin film on a first base layer; forming a reference electrode, including forming a silver thin film on a second base layer and applying a silver and silver chloride paste to a portion of the silver thin film; and arranging the free chlorine electrode and the reference electrode on a common frame.

The present invention relates to a new device for selective arsenic sensing using electrochemically reduced graphene oxide (ERGO) based reusable flexible electrode strip. Active electrode of the device was prepared by a very simple method in which the thin film of graphene oxide (GO) was reduced electrochemically at a low DC potential (0 to -1.5 V). The said device selectively detects As.sup.3+ in field water sample within a wide range of concentrations with a limit of detection of less than 25 ppb. More importantly, the selectivity of the electrode is independent of conductivity and TDS levels of measured field water samples which were collected from various parts of India. Selective detection of As.sup.3+ by ERGO was controlled by optimizing the surface electronic conductivity through structural modification of it during electroreduction process.

Disclosed is a reference electrode comprising: an ionic-liquid-containing membrane; and a hydrophilic membrane disposed on the ionic-liquid-containing membrane.

A fabricating method of a non-enzyme sensor element includes a printing step, a coating step and an electroplating step. In the printing step, a conductive material is printed on a surface of a substrate to form a working electrode, a reference electrode and an auxiliary electrode, and a porous carbon material is printed on the working electrode to form a porous carbon layer. In the coating step, a graphene film material is coated on the porous carbon layer of the working electrode to form a graphene layer. In the electroplating step, a metal is electroplated on the graphene layer by a pulse constant current to form a catalyst layer including a metal oxide.

ABA type block copolymers as a new class of temperature sensing polymers with tunable, high temperature coefficient of resistance (TCR). A sensor includes a heater, a thermal insulator between two thermometer layers, the heater generating a thermal gradient within the thermal insulator. The thermometers give an indirect measurement of fluid flow around the sensor, based on their temperature readings. The thermometers are flexible layers including ABA block polymers.

The present invention relates to a multi-ion sensor (1) for measuring ions in aqueous systems comprising a flexible or semi-flexible substrate (11), a reference electrode (13) applied to the substrate (11), at least three working electrodes (15a, 15b, 15c) applied to the substrate (11), wherein the substrate (11), the reference electrode (13) and the working electrodes (15a, 15b, 15c) form an ion-selective sensor unit (101), a connection device (17) for the ion-selective sensor unit (101) and a sensor housing (19) which accommodates an assembly of ion-selective sensor unit (101) and connection device (17), wherein the reference electrode (13) has dimensions of max. 4 mm×4 mm×4 mm.

The present invention is furthermore directed to a flow measuring cell (3) for measuring ions in aqueous systems as well as to a respective method for measuring ions in aqueous systems and a system for measuring ions in aqueous systems and for adjusting the ion contents in the aqueous systems.

A single-use disposable potentiometric reference sensor includes an insulating base substrate, a reference electrode disposed on the insulating base substrate where the reference electrode is a silver-silver chloride electrode, an internal layer disposed on the reference electrode where the internal layer is an amorphous salt layer that includes an amorphous polysaccharide and a salt having equi-mobility cations and anions, and a semipermeable cover membrane disposed over the internal layer where the semipermeable cover membrane has water vapor and ion permeability.