Product Releases

Blend ppb & ppt Analyte Concentrations

Tue, 09/22/2009 - 12:34pm

The 491M/B/SD modular gas standards generator dynamically blends precisely known VOC/TOC gas standards with parts-per-billion (ppb) and parts-per-trillion (ppt) analyte concentrations. The 491M/B/SD:

  • Uses dynamic blending to circumvent the common problems with ppb and ppt standards.
  • Uses a modular, two-stage dilution approach and permeation tubes with measurable rates to control analyte flow.
  • Has a combined dilution flow requirement of 10 l/min or less.
  • Allows the “standard additions technique” to be used to ensure accuracy.


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