Gerald F Schultz

US Patent:

6938482, Sep 6, 2005

Filed:

Jun 3, 2003

Appl. No.:

10/250084

Inventors:

Gerald Schultz - Brookline MA, US

Assignee:

General Electric Co. - Plainville CT

International Classification:

G01N007/00

US Classification:

7333501, 73 2901, 73 2905, 73 3105, 422 88

Abstract:

A humidity sensor element for a humidity sensing device includes a rigid, p doped silicon substrate, a non-porous terminal on one side of the substrate, a porous terminal on a second side of the substrate, and a layer of polyphenylsulfone between the porous terminal and the substrate. The sensor elements displays improved linear response with humidity changes and very low hysteresis.

US Patent:

20050150276, Jul 14, 2005

Filed:

Jan 9, 2004

Appl. No.:

10/707760

Inventors:

GERALD SCHULTZ - BROOKLINE MA, US

Assignee:

GENERAL ELECTRIC COMPANY - PLAINVILLE CT

International Classification:

G01N005/02

US Classification:

073073000

Abstract:

A method and Apparatus for measuring water of hydration in a polyelectrolyte membrane (PEM) employs a source of input radiation directed at an input location on the PEM, and a detector responsively positioned at an output location relative to the input location for determining a sensible change in the input radiation indicative of a level of water hydration in the PEM. The method measures hydration of the (PEM) by forming an input location in the PEM; launching a source of radiation into the input location for reaction with the PEM material; detecting the reaction of the input radiation with the PEM material; and determining a sensible change in the input radiation as a result of the reaction indicative of a level of water hydration in the PEM.