Dynamic dilution system

Measuring and testing – Instrument proving or calibrating – Gas or liquid analyzer

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137 7, G01N 3300

Patent

active

056612257

ABSTRACT:
An apparatus for generating a low concentration calibration gas mixture containing percent, ppm, ppb or ppt amounts of a desired analyte from a high concentration gas mixture and a high purity diluent using a series of source gas containing vessels and a series of parallel gas or chemical conduits controlled by mass flow controllers in a purged enclosure with conduits to purge gas conduits of residual gases or corrosive gases.

REFERENCES:
patent: 4101282 (1978-07-01), Ririe
patent: 4290296 (1981-09-01), Bredeweg et al.
patent: 5054309 (1991-10-01), Mettes et al.
patent: 5214952 (1993-06-01), Leggett et al.
patent: 5239856 (1993-08-01), Mettes et al.
patent: 5587519 (1996-12-01), Ronge et al.

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