食品、制药和生物技术行业的卫生标准要求使用清洁剂清洁加工机器，或使用过热蒸汽进行消毒。各种法规，例如欧洲协会 EHEDG(欧洲卫生工程与设计集团)的法规和美国法规“ASME BPE”为所有使用的组件(包括测量设??备)制定了指南，以确保*佳的清洁性。一个非常重要的任务是避免间隙，这意味着难以进入的空间以致于介质残留物可能会留在那里。此外，所用材料的表面粗糙度应尽可能低以防止粘附。

　　原文：

　　Hygienic standards of the food, pharmaceutical, and biotechnology industries require processing machines to be cleaned with detergents, or sterilised, with superheated steam. Various regulations such as those of European association EHEDG (European Hygienic Engineering & Design Group) and US regulations “ASME BPE” set guidelines for all components used, including measuring equipment, to ensure optimum cleanability. A very important task is to avoid clearances, which means spaces that are so hard to access that residues of media can remain there. Additionally, the surface roughness of the materials employed should be as low as possible to prevent adhesion.