Water quality. Determination of turbidity -- Semi-quantitative methods for the assessment of transparency of waters
This document specifies the following semi-quantitative methods for the assessment of transparency of waters:
measurement of visual range using the transparency testing tube (applicable to transparent and slightly cloudy water), see Clause 4;
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;
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 | BSI: British Standards Institution |
| Document Number | ISO 7027-2 |
| Publication Date | Feb. 26, 2019 |
| Language | en - English |
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| Revision Level | |
| Supercedes | |
| Committee | EH/3/2 |