Theodore T. Puck

An Automatic Dewpoint Meter for the Determination of Condensable Vapors

A method for determination of very small concentrations of condensable vapors by measurement of the decrease in reflectivity of a cooled surface on which the vapor has been deposited is described. The method is applicable to mixtures of 2 components, one of which may be water. Use is made of the fact that a vapor will condense at a concentration below its vapor pressure in the presence of a second vapor whose liquid is soluble in that of the first. The most volatile component of the mixture is used in the pure state as a refrigerating agent whose evaporation cools the light‐reflecting surface to an accurately regulated temperature which produces condensation of the two components.An instrument embodying these principles is described which quantitatively measures triethylene glycol vapor in concentrations as low as 10−4 mm Hg. The construction is simple and the operation continuous and automatic. The calibration of the instrument is presented. By proper adjustment, automatic compensation for changing atmos...

The Dispersal and Control of Triethylene Glycol Vapor for Aerial Disinfection

(1946). The Dispersal and Control of Triethylene Glycol Vapor for Aerial Disinfection. American Industrial Hygiene Association Quarterly: Vol. 7, No. 3, pp. 10-16.