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Radiometry of water turbidity measurementsAn examination of a number of measurements of turbidity reported in the literature reveals considerable variability in the definitions, units, and measurement techniques used. Many of these measurements differ radically in the optical quantity measured. The radiometric basis of each of the most common definitions of turbidity is examined. Several commercially available turbidimeters are described and their principles of operation are evaluated radiometrically. It is recommended that the term turbidity be restricted to measurements based upon the light scattered by the sample with that scattered by standard suspensions of known turbidity. It is also recommended that the measurement procedure be standardized by requiring the use of Formazin as the turbidity standardizing material and that the Formazin Turbidity Unit (FTU) be adopted as the standard unit of turbidity.
Document ID
19740014935
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Mccluney, W. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
April 1, 1974
Subject Category
Instrumentation And Photography
Report/Patent Number
X-913-74-109
NASA-TM-X-70641
Accession Number
74N23048
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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