選擇防水防塵透氣產(chǎn)品時，先確定應(yīng)用、設(shè)備或外殼所需的防護等級非常關(guān)鍵。

由于NEMA需要進行IP中不包含的額外測試，因此IP防護等級無法“轉(zhuǎn)換”為NEMA等級。但是，NEMA防護等級可滿足或超出特定IP代碼的要求。

This document explains the format and classification of Ingress Protection (IP) ratings, according to the IEC 60529 standards.

This document explains the Underwriters Laboratory standard for testing the flammability properties of plastic materials used for parts in devices and appliances.

Description of standard test used to measure a membrane's ability to stop aqueous flow, and diagram of the apparatus used for water entry pressure testing.

Description of standard test used to measure airflow of low flowing media, and diagram of the apparatus used for Gurley airflow testing.

The key to choosing the appropriate membrane technology for a given application is understanding the environmental conditions and the surface tension of the fluids that the vent will encounter.

Description of standard test used to measure resistance of high flowing media, and diagram of the apparatus used for resistance testing.

Description of standard test used to measure the force required to separate the layers of a laminate, with diagrams of possible outcomes when water entry pressure has been exceeded.

Description of GORE? Oleophobic Membranes, oil repellancy testing, oil ratings, and surface tensions of typical fluids.

A variety of methods can be used to seal GORE? Membranes to plastic parts. This document describes two common methods: heat sealing, and ultrasonic welding.