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.
SDO | ISO: International Organization for Standardization |
Document Number | ISO 7027 |
Publication Date | Not Available |
Language | en - English |
Page Count | |
Revision Level | |
Supercedes | |
Committee | ISO/TC 147/SC 2 |