Orion Research, Inc.

James Barbookles

Laura Brockway

Paul Sydlowski

Thomas Paquette

Jeffrey S Cohen

Steven J West

Loren Somes

Chin-I Shyr

Christopher McIntre

Moshe J Hirshberg

An improved ion-selective electrode with enhanced sensitivity and reliability. The electrode is readily formed from an electrode assembly sealingly joined to the upper end of an electrode chamber whose lower end opens into in a tube bore of substantial path length that provides a conductive path between the electrode assembly and a sensing tip of the electrode. The electrode assembly itself takes the form of a generally helical coil formed on a post extending from the upper end of the assembly and positioning a substantial length of conductive lead remote from the sensing tip of the electrode. The electrode chamber is thermally insulated from the main body of the electrode, and adverse temperature effects are thus greatly minimized. A self-cleaning junction has also been developed. Increased reliability for a given sensitivity have been found to result from the construction.

Ion-selective electrode

PH and concentration meter

The present invention comprises an electrochemical metering apparatus that provides for convenient storage and presentation of the analytical electrode, simple assembly, and two calibration modes. The apparatus includes an electrode storage and presentation assembly that permits the user to introduce the electrode into a sample solution while simultaneously observing the meter's output, and store the electrode when not in use. All structural components are intended to fit together with interlocking tabs and windows. A serial port fits within the construction of the main housing without the need for bolts, and battery clips that depend directly from the circuit board obviate the need for wiring connections. The present invention also features two calibration modes. A 'segment addition' mode permits separation of the voltage/concentration curve into individually plotted regions, the number of which depends on the number of reference solutions used in the calibration procedure. The segment corresponding most closely to the measured potential of a sample solution is used to calculate concentration. In an alternative calibration mode, one or more reference solutions are used to establish metered voltage/concentration combinations that are compared with expected, known values. Any discrepancies therebetween furnish a 'noise level' value associated with the apparatus that can be used to more precisely define the orientation of the voltage/concentration curve.

pH and concentration meter

Portable printer

The present invention comprises an electrochemical metering apparatus that provides for convenient storage and presentation of the analytical electrode, simple assembly, and two calibration modes. The apparatus includes an electrode storage and presentation assembly that permits the user to introduce the electrode into a sample solution while simultaneously observing the meter's output, and store the electrode when not in use. All structural components are intended to fit together with interlocking tabs and windows. A serial port fits within the construction of the main housing without the need for bolts, and battery clips that depend directly from the circuit board obviate the need for wiring connections. The present invention also features two calibration modes. A 'segment addition' mode permits separation of the voltage/concentration curve into individually plotted regions, the number of which depends on the number of reference solutions used in the calibration procedure. The segment corresponding most closely to the measured potential of a sample solution is used to calculate concentration. In an alternative calibration mode, one or more reference solutions are used to establish meterd voltage/concentraiton combinations that are compared with expected, known values. Any discrepancies therebetween furnish a 'noise level' value associated with the apparatus that can be used to move precisely define the orientation of the voltage/concentration curve.

Growing community of inventors

Malden, MA, United States of America

James Barbookles