ISO 7027:1999 is an ISO standard for water quality that enables the determination of turbidity. The ISO 7027 technique is used to determine the concentration of suspended particles in a sample of water by measuring the incident light scattered at right angles from the sample. The scattered light is captured by a photodiode, which produces an electronic signal that is converted to a turbidity.
- ISO 7027:1999 - Water quality -- Determination of turbidity http://www.iso.org/iso/catalogue_detail.htm?csnumber=30123
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