Gas Fed Permeation Tubes

The Trace Source™ 57 Series refillable permeation tubes from Kin-Tek (USA) extend the range of analyte compounds available to include high-pressure gases such as O2, CO, CO2, CH4, C2H2, etc. The 57 Series tubes are used in Kin-Tek Gas Standards Generators to dynamically blend ppm and ppb mixtures directly from the pure gas.

Typically permeation tubes contain liquified analyte compound (and, of course, its vapor) as the permeate source. This limits the range of compounds available in permeation tubes. Series 57 tubes use a controlled pressure of the analyte vapor as the permeate source, thus allowing permeation tubes of very low boiling compounds.

Dilutions from less than 103:1 to over 109:1 can be achieved in a single step with Series 57 tubes. They are particularly useful for preparing trace mixtures containing atmospheric gases, light hydrocarbons, and hydrides, and acid gases. They can also be used to dilute multi-component mixtures.