BSI BS EN ISO 7027-2:2019

Current Revision
Water quality. Determination of turbidity -- Semi-quantitative methods for the assessment of transparency of waters

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BSI BS EN ISO 7027-2:2019

Water quality. Determination of turbidity -- Semi-quantitative methods for the assessment of transparency of waters

PUBLISH DATE 2019
PAGES 20
BSI BS EN ISO 7027-2:2019

This document specifies the following semi-quantitative methods for the assessment of transparency of waters:

  1. Measurement of visual range using the transparency testing tube (applicable to transparent and slightly cloudy water), see Clause 4;

  2. 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;

  3. 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.

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