随着饮用水设施努力提高产品质量，人们越来越关注过滤器的性能。相对复杂的仪器，即。颗粒计数器通常用于量化，从而有助于进一步改善过滤器出水质量。然而，通常用于饮用水行业的颗粒计数器仅限于检测尺寸大于2微米的颗粒。虽然当用作隐孢子虫和贾第虫的替代检测方法时，这是一个合理的大小范围，但它不一定是最佳量化过滤操作的最合适大小范围。 我们描述了一种设计用于对亚微米颗粒敏感的激光浊度计，并将其产生的数据与几个过滤周期的颗粒计数进行比较，检查成熟、稳态运行和突破等特征。包括2个参考文献、图表。

As drinking water facilities strive to improve the quality of their product, an increasing amount of attention is being focussed on filter performance. Instrumentation of relatively high sophistication, viz. particle counters, are commonly being employed in an attempt to quantify, and thereby help in further improving filter effluent quality. Particle counters typically used in the drinking water industry, are however, limited to examining particles greater than 2 microns in size. While this is a reasonable size range when used as a surrogate detection method for cryptosporidium and giardia, it is not necessarily the most appropriate size range for best quantifying filter operation. We describe a laser nephelometer designed to be sensitive to sub-micron particles and compare data produced by it to particle counts on several filter cycles, examining features such as ripening, steady state operation, and breakthrough. Includes 2 references, figures.