壓力開關是如何實現自動報警的
如今市場上，壓力開關可分為機械壓力開關和電子式壓力開關，這兩種開關都可以實現自動報警功能，但是方法卻不一樣，下面分別介紹下這兩種壓力開關是如何實現報警的。
機械式壓力開關是在壓力增加時，作用在不同的傳感壓力元件即膜片、波紋管、活塞三大元件產生形變，向上移動，通過欄桿彈簧等機械結構，啟動最上端的微動開關，使得電信號輸出來達到自動報警的功能。
電子式壓力開關是近幾年比較流行使用的，一般使用在工控控制要求比較高的系統上或者是用來代替電接點壓力表的。這種壓力開關內設精密壓力傳感器，通過高精度儀表放大器放大壓力信號，通過高速MCU采集并處理數據，采用4位LED實時數顯壓力，繼電器信號輸出。上下限控制點可以自由設定，利用回差設置可以有效保護壓力波動帶來的反復動作，保護控制設備。
西安仕樂克控制器制造有限公司 (www.shelok.net)
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