The LNI Schmidlin PermaCal Calibration Gas Generator allows the preparation of Calibration Gas Standards at a wide user-definable concentration range.

PermaCal uses an external source of Ultra Zero Air and gas permeation tubes, combined with mass flow controllers to produce user-definable gas calibration standards.  A gas permeation tube contains a specific substance in liquid and vapour phases.  The diffusion rate of the vapour phase through the tube is a function of temperature.  By maintaining the tube at a constant controlled temperature, the gas permeation rate becomes constant.  Using mass flow controllers to generate a range of dilution flows of Ultra Zero Air, PermaCal can generate specific concentrations of calibration gas.

Applications:

• Generating calibration gases for direct connection to GC

• Generating sorbent tube calibrators/reference standards