一、概述气体中微量水分测量与控制技术,在现代工业,如电子、电力、石油化工、原子能以及宇航技术等部门中得到广泛的应用。由于微量水分测量多采用性能好的传感器,需要建立测量的标准和方法,校准仪器,统一量值。水渗透管正起到以上的作用。它是一种结构简单、性能稳定、使用方便的微量水分发生源,和动态配气装置联用可连续产生微量水分标准气体。由于渗透管的渗透率采用重量法标定,所以量值准确可靠,可以作为校准微量水分分析仪器的工作标准。本文介绍用聚四氟乙烯丙烯材料制成的水渗透管,渗透率范围3～12微克/分,渗透率 First, an overview of trace moisture measurement and control technology in the modern industry, such as electronics, power, petrochemicals, atomic energy and aerospace technology and other departments have been widely used. As the use of trace moisture measurement performance of many sensors, the need to establish standards and methods of measurement, calibration equipment, unified value. Water permeation tube is playing the above role. It is a simple structure, stable performance, easy to use trace moisture sources, and dynamic gas distribution device can be used in conjunction to produce trace moisture standard gas. Because of the permeability of permeation tubes gravimetric calibration, accurate and reliable value, can be used as a calibration standard working standard moisture analyzer. This article describes water permeation tubes made of polytetrafluoroethylene propylene, with permeabilities ranging from 3 to 12 μg / min, permeabilities