Accession Number : ADD005110

Title :   Hygrometer.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Gerber,Hermann E

Report Date : 11 Apr 1978

Pagination or Media Count : 6

Abstract : This patent describes a supersaturation hygrometer formed by a thermo-optical servo system which responds to water vapor changes in the range just above and below water saturation. The system includes a hydrophobic metal chip on which monodisperse submicron salt particles act as centers of water condensation. A change in scattered light from the solution droplets on the chip drives an infrared source which heats the chip to keep the size of the droplets constant. The infrared power is related to the chip ambient temperature difference which is proportional to the ambient water vapor pressure. (Author)

Descriptors :   *Patents, Hygrometers, Supersaturation, Water vapor, Light scattering, Infrared radiation, Servomechanisms

Subject Categories : Meteorology
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE