BS EN ISO 7027-2:2019规定了评估水域透明度的以下半定量方法。a） 使用透明测试管测量视野（适用于透明和微混浊的水），见第4条；b） 使用透明度测试盘测量上层水层的可视范围（尤其适用于地表水、洗澡水、废水，并经常用于海洋监测），见5.1；c） 潜水员在指定深度的能见度测量。交叉引用:CIE S 017/EISO 5725-2:1994购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS EN ISO 7027-2:2019 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.Cross References:CIE S 017/EISO 5725-2:1994All current amendments available at time of purchase are included with the purchase of this document.