UL淋雨噴嘴(噴頭)符合UL60507-ENGL 1999、UL484-34、ANSI Z21.10.3-2004、ANSI Z21.58、ANSL B94.11M及CSA4.3-2004相關標準要求。

主要作用是用于電子電工產品、燈具、電柜、電器元件等產品在模擬淋雨的氣候條件下，對產品的物理以及其它相關性能進行測試。測試后，通過檢定來判斷產品的性能是否達到要求，以便于產品的設計、改進、檢定及出廠檢驗使用。

一般裝置需要3個噴嘴

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.