This document specifies the following semi-quantitative methods for the assessment of transparency of waters:
a) measurement of visual range using the transparency testing tube (applicable to transparent and slightly cloudy water), see Clause 4;
b) measurement of visual range in the upper water layers using the transparency testing disc (especially applicable to surface, bathing water, waste water and often used in marine monitoring), see 5.1;
c) measurement of visibility by divers in a destined depth, see 5.2.
NOTE The quantitative methods using optical turbidimeters or nephelometers are described in ISO 7027-1.
Status: PublishedPublication date: 2019-01
Edition: 1Number of pages: 12
Technical Committee: ISO/TC 147/SC 2 Physical, chemical and biochemical methods
- ICS :
- 13.060.60 Examination of physical properties of water
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ISO 7027-2:2019Stage: 60.60
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