Contaminant error reduction system for dew point hygrometers

Details Contaminant error reduction system for dew point hygrometers Contaminant error reduction system for dew point hygrometers

1978-10-06

1980-08-12

Kreitman, Stephen A.

Measuring and testing

Gas content of a liquid or a solid

By vibration

73 29, G01N 2502

Patent

active

042166691

ABSTRACT:
The invention relates to the periodic interruption of normal control at the condensation temperature by cooling the condensing surface to a temperature well below the prevailing dew point for a time sufficient to provide a heavy growth and coalescence of the condensate so as to dissolve all of the soluble material and create a medium by which molecules of solute can migrate. Immediately after cooling, the condensing surface is heated to a temperature well above the prevailing dew point so as to cause total evaporation of the solvent (condensate) and recrystallization or precipitation of the solute into clusters or isolated colonies. The resulting change in mirror reflectance is compensated after total evaporation by automatic adjustment of the light intensity of the source.

REFERENCES:
patent: 2720107 (1955-10-01), McBrair
patent: 3195344 (1965-07-01), Francisco
patent: 3623356 (1971-11-01), Bisberg

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