Wafer Device

Wafer devices have only a small permeable window, or wafer, so permeation rates are typically an order of magnitude lower than rates for tubular devices. Since permeation occurs only through the polymeric wafer, the permeation rate is controlled by varying the wafer material, the thickness of the wafer, and the diameter of the permeation opening. Gases whose high vapor pressure at normal permeation temperatures prevent their containment in a tubular device can be contained in a wafer device. Wafer devices are available in different styles to allow use in calibrators made by various manufacturers.

VICI Metronics, Inc., 2991 Corvin Drive, Santa Clara, CA 95051. Tel: 408-737-0550; Fax: 408-737-0346.