Patent ID: 8610894
Filing Date: 2013-12-17
Classification: G01N

Abstract:
1. A dryness fraction measuring device, comprising: a light-emitting body irradiating moist steam with light at a plurality of wavelengths; a light-receiving element receiving light of a plurality of wavelengths that has traversed moist steam; and a dryness fraction calculating portion calculating the dryness fraction of the moist steam based on a received light intensity of the light at each of the plurality of wavelengths; wherein the dryness fraction calculating portion calculates the dryness fraction based on the received light intensities at two wavelengths; and wherein of the two wavelengths, the optical absorption of light at one of the wavelengths is correlated to the density of water molecules that exist as single molecules in the moist steam, and the optical absorption of light at the other wavelength is correlated to the density of water molecules that form clusters of two molecules in the moist steam.