DNS/ISO 7027-2:2019 

Water quality -- Determination of turbidity -- Part 2: Semi-quantitative methods for the assessment of transparency of waters


Committee: SLBS TC 01
Status: Public Comments
Start date: 14/10/2019
End date: 30/1/2020

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.