UL淋雨喷嘴(喷头)符合UL60507-ENGL 1999、UL484-34、ANSI Z21.10.3-2004、ANSI Z21.58、ANSL B94.11M及CSA4.3-2004相关标准要求。

主要作用是用于电子电工产品、灯具、电柜、电器元件等产品在模拟淋雨的气候条件下，对产品的物理以及其它相关性能进行测试。测试后，通过检定来判断产品的性能是否达到要求，以便于产品的设计、改进、检定及出厂检验使用。

一般装置需要3个喷嘴

19.17 Rain test apparatus

19.17.1 The rain test apparatus shall to consist of 3 spray heads mounted in a water supply pipe rack asshown in Figure 19.17.1. The spray heads shall be in accordance with Figure 19.17.2.

19.17.2 The water pressure shall be maintained at 34.5 kPa (5 psi) at each spray head.

19.18 Sprinkler test apparatus19.18.1 The sprinkler test apparatus shall consist of a single spray head mounted as shown in Figure19.18.1.

The spray head shall be in accordance with Figure 19.17.2.

19.18.2 The water pressure shall be maintained at 140 kPa (20 psi) at the spray head.