Suspended particle concentration monitor
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United States of America Patent
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Aug 18, 1998
Grant Date -
N/A
app pub date -
Jul 23, 1997
filing date -
Jul 23, 1997
priority date (Note) -
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Abstract
A suspended particle concentration monitor includes near and far detector circuits with near and far elements sensing scattered visible or near infrared radiation projected into a fluid volume in which particle concentration is determined. The spacing and characteristics of the light sensitive elements and the gains of the near and far detector circuits are selected to produce generally equal peak signals at separate particle concentrations. A computer contains three tables each containing particle concentrations in respective portions of the particle concentration range being monitored. Based upon analysis of the near and far detector signals, one of the tables is selected and used to find the particle concentration corresponding to one of the near and far detector signals.
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