Using Trace Source™ Permeation Tubes, Span Pac™ I – SD dilution system adds precisely known flow of span vapor into controlled, adjustable flow of clean matrix gas to create PPM calibration standard. Second dilution stage further dilutes mixture with matrix gas to lower concentration. Output concentration can be varied over range of up to 10,000:1 from single tube. System can also be used to create adjustable concentration while maintaining constant total flow with concentrations of up to 400:1.
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