Abstract
An apparatus has been designed to facilitate the calibration of mercury vapor detectors. Known volumes of pure air, and air saturated with mercury, are mixed and introduced into a Lucite box which houses the meter under study. Calibration points are then obtained by adjusting the mercury vapor and air dilution ratios. Mercury concentrations are checked chemically by collecting the vapor in acidified potassium permanganate and analyzing by a dithizone extraction method.