Steven R Wells

US Patent:

7799193, Sep 21, 2010

Filed:

Mar 5, 2007

Appl. No.:

11/681787

Inventors:

Steven Wells - Huntington Beach CA, US
Gert Burkhardt - Pasadena CA, US
Anthony Thai - Orange CA, US

Assignee:

Georg Fischer Signet LLC - El Monte CA

International Classification:

C25B 9/00
G01N 27/26
B23H 3/02

US Classification:

204433, 204400, 2042286, 204435

Abstract:

An electrochemical sensor is provided that includes a housing having an outer wall, a plurality of longitudinal walls disposed within the outer wall, and a reference chamber housing a reference electrode. The longitudinal walls define a plurality of longitudinal chambers. Ionic communication between the target fluid and the reference electrode passes sequentially through each of longitudinal chambers from a first longitudinal chamber to the reference chamber. In this manner, the sensor provides generally a long, tortuous flow path, or salt bridge, between the target fluid and the reference electrode, resulting in a high resistance factor for the sensor.

US Patent:

7867371, Jan 11, 2011

Filed:

Sep 21, 2006

Appl. No.:

11/533989

Inventors:

Steven Wells - Huntington Beach CA, US
Gert Burkhardt - Pasadena CA, US
Anthony Thai - Orange CA, US

Assignee:

Georg Fischer Signet, LLC - El Monte CA

International Classification:

G01N 27/30

US Classification:

204435, 204433, 204409, 2057875, 324438

Abstract:

An electrochemical sensor is provided that includes a housing defining a cavity for a reference electrolyte and defining an opening to the cavity configured to be proximate to a target fluid. The sensor further includes a junction plug comprising a porous material and a cross member impermeable to a target fluid positioned between the junction plug and the cavity. The cross member includes a planar portion disposed against the junction plug that defines an aperture to enable electrochemical communication between the target fluid and the reference electrolyte.

US Patent:

7909972, Mar 22, 2011

Filed:

Nov 28, 2006

Appl. No.:

11/564015

Inventors:

Steven Wells - Huntington Beach CA, US
Gert Burkhardt - Pasadena CA, US
Anthony Thai - Orange CA, US

Assignee:

Georg Fischer Signet LLC - El Monte CA

International Classification:

G01N 27/30

US Classification:

204433, 204435, 204409

Abstract:

An electrochemical sensor is provided that includes a housing having an outer wall, an axial bore circumscribed by the outer wall, and a barrier wall that aids in defining a reference cavity. The housing further including a plurality of cross members in spaced relation to one another disposed between the axial bore and the outer wall, each cross member defining an aperture. A junction plug is disposed at the distal end of the housing. The junction plug comprises a porous material that enables ionic flow through the junction plug. The sensor enables ionic communication between the target fluid and the reference electrode within the reference cavity through the apertures of the plurality of cross members. In this manner, the sensor provides generally a long, tortuous flow path, or salt bridge, between the target fluid and the reference electrode, resulting in a high resistance factor for the sensor.

US Patent:

8211282, Jul 3, 2012

Filed:

Sep 15, 2010

Appl. No.:

12/883115

Inventors:

Steven Wells - Huntington Beach CA, US
Gert Burkhardt - Pasadena CA, US
Anthony Thai - Orange CA, US

Assignee:

Georg Fischer Signet, LLC - El Monte CA

International Classification:

G01N 27/40
G01N 27/401

US Classification:

204433, 204400, 2042285, 204435

Abstract:

An electrochemical sensor is provided that includes a housing having an outer wall, a plurality of longitudinal chambers disposed within the outer wall, and a reference chamber housing a reference electrode. Ionic communication between the target fluid and the reference electrode must pass sequentially through each of longitudinal chambers from a first longitudinal chamber to the reference chamber. In this manner, the sensor provides generally a long, tortuous flow path, or salt bridge, between the target fluid and the reference electrode, resulting in a high resistance factor for the sensor.

US Patent:

8317989, Nov 27, 2012

Filed:

Jan 18, 2011

Appl. No.:

13/008839

Inventors:

Steven Wells - Huntington Beach CA, US
Gert Burkhardt - Pasadena CA, US
Anthony Thai - Orange CA, US

Assignee:

Georg Fischer Signet LLC - El Monte CA

International Classification:

G01N 27/30

US Classification:

204433, 204435, 204409, 2057875

Abstract:

An electrochemical sensor is provided that includes a housing having an outer wall, an axial bore circumscribed by the outer wall, and a barrier wall that aids in defining a reference cavity. The housing further including a plurality of cross members in spaced relation to one another disposed between the axial bore and the outer wall, each cross member defining an aperture. A junction plug is disposed at the distal end of the housing. The junction plug comprises a porous material that enables ionic flow through the junction plug. The sensor enables ionic communication between the target fluid and the reference electrode within the reference cavity through the apertures of the plurality of cross members. In this manner, the sensor provides generally a long, tortuous flow path, or salt bridge, between the target fluid and the reference electrode, resulting in a high resistance factor for the sensor.

US Patent:

8336375, Dec 25, 2012

Filed:

Jun 18, 2010

Appl. No.:

12/819076

Inventors:

Anthony Thai - Orange CA, US
Steven Wells - Huntington Beach CA, US
Gert Burkhardt - Pasadena CA, US

International Classification:

G01F 15/02

US Classification:

73199

Abstract:

A flow cell assembly for fluid sensors is provided. The assembly includes a housing configured to couple to an external source of fluid for measurement. The assembly further includes a flow regulator and a flow meter disposed within the housing to facilitate controlled fluid. The housing defines one or more measuring chambers each configured to receive a fluid sensor. Each measuring chamber includes an inlet aperture and a gravity overflow spaced apart from the inlet aperture. Each measuring chamber is configured to receive a fluid sensor such that a sensing end of the fluid sensor is disposed proximate to an inlet aperture of the measuring chamber, thereby ensuring controlled fluid pressure proximate to the sensing end.

US Patent:

20110240470, Oct 6, 2011

Filed:

Sep 24, 2010

Appl. No.:

12/889876

Inventors:

Steven Wells - Huntington Beach CA, US
Gert Burkhardt - Pasadena CA, US
Anthony Thai - Orange CA, US

Assignee:

Georg Fischer Signet LLC - El Monte CA

International Classification:

G01N 27/30

US Classification:

204435

Abstract:

An electrochemical sensor is provided that includes a housing defining a cavity for a reference electrolyte and defining an opening to the cavity configured to be proximate to a target fluid. The sensor further includes a junction plug comprising a porous material and a cross member impermeable to a target fluid positioned between the junction plug and the cavity. The cross member is disposed proximate to the junction plug, defining an aperture to enable electrochemical communication between the target fluid and the reference electrolyte.

US Patent:

20200217698, Jul 9, 2020

Filed:

Jan 9, 2019

Appl. No.:

16/243980

Inventors:

- El Monte CA, US
Steven Wells - Huntington Beach CA, US

Assignee:

Georg Fischer Signet LLC - El Monte CA

International Classification:

G01F 1/58

Abstract:

A magnetic flowmeter assembly for measuring the velocity of a conductive fluid in a flow path. The flowmeter assembly includes a coil driver for providing a drive current to a coil assembly, an electrode for measuring an electrical signal created by the conductive fluid flowing through a magnetic field created by the coil assembly, and a micro-processor for controlling the magnetic flowmeter. The micro-processor determines the electrical conductivity of the fluid based on the sensed electrical signal. The micro-processor then modifies the frequency of the coil driver in response to the fluid's electrical conductivity to optimize the sampling rate of the flowmeter. The flowmeter assembly modifies the coil driver frequency by either increasing the drive frequency for highly conductive fluids or decreasing the drive frequency for less conductive fluids.