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Gas Reference Information

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PermaCal Calibration Gas Generator:

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.


  • Generating calibration gases for direct connection to GC

  • Generating sorbent tube calibrators/reference standards


  • Permeation oven: accepts up to 6 permeation tubes (up to 12 cm long)

  • Oven Temperature: 40 - 80 oC

  • Permeation oven flow: 100 mL/min

  • Total flow: 500 to 5,000 mL/min (depending on concentration setting)

  • Requires external source of Ultra Zero Air

  • Inlet pressure: 45 psig

  • Outlet pressure: atmospheric pressure

  • Small size (6" W x 14" D x 15" H) conserves lab bench space

  • LCD touch-screen display provides simplified user interface

  • Weight: 31 lbs

  • 1 year parts & labour warranty

  • CE & CSA certified

    Find out more


PermaCal Calibration Gas Generator



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