壓力開關的定義
壓力開關是控制壓力的一種開關，也可稱為壓力控制器，當壓力達到設定的壓力值時，就會有觸點信號輸出信號，最終達到控制設備的目的。由于結構的不同，壓力開關的原理大體類似，卻也有不同。
機械壓力開關的工作原理：機械壓力開關是純機械形變引起的開關動作，當壓力增加時，作用在不同的元件會產生形變，通過欄桿彈簧等啟動微動開關，使得電信號輸出。
電子壓力開關的工作原理：當系統內壓力高于或低于額定的安全壓力時，感應器內碟片瞬時發生移動，通過連接導桿推動開關接頭接通或斷開，當壓力降至或升額定的恢復值時，碟片瞬復位，開關自動復位。
不管是機械壓力開關還是電子壓力開關，都是通過檢測系統壓力，當壓力達到設定值，觸點狀態發生改變的控制壓力元件。
西安仕樂克控制器制造有限公司 (www.a3025.cn)
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