Eg&g, Inc.

Stanley B Hayes, Jr

Robert T O'Connor

A dew point hygrometer wherein separate reflective surfaces reflect light from separate light sources to a single light sensor. One surface is cooled to develop a coating of condensation. The other surface provides a standard to detect contamination build-up on both surfaces, and to detect variations in the operation of the single light sensor.

Dew point hygrometer with continuous balancing system

A dew point hygrometer which employs two cooled reflective surfaces with one surface being held at a lower temperature than the other. The lower temperature surface provides a wet mirror to detect dew formation and the dry mirror provides a standard which may be used to compensate for contamination build up on both surfaces.

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Norfolk, MA, United States of America

Stanley B Hayes, Jr