An industrial hygiene calibration manifold

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Abstract
The industrial hygiene calibration manifold provides a continuous, stable, dynamic, reproducible vapor sample in the concentration range of fractional to thousands of parts per million. The principle of operation is the gravimetric determination of the sample diffusion or permeation rate and the measurement of total volumetric flow. The manifold consists of the following components: an organic-free air system, vapor jacketed diffusion-permeation chamber, jacketed multicomponent Venturi-type mixing manifold, exponential dilution flask and jacketed sampling manifold. This manifold can be used to validate or calibrate various industrial hygiene analyses such as charcoal and detector tube technology, impinger techniques, respirator cartridge testing, and various survey instruments.

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