該浮球液位開關(guān)有一個帶永磁體的浮球，該浮球能夠可靠地隨著液位的變化在導向管中上下運動。導向管內(nèi)裝有一個磁干簧觸點（填充惰性氣體）。當浮球接近時，永磁體產(chǎn)生的磁力會透過浮球的無磁性壁和導向管，使觸點發(fā)生吸合。通過使用磁體和磁干簧觸點可以實現(xiàn)非接觸式開關(guān)動作，從而可避免產(chǎn)生磨損， 且無需使用電源。該浮球開關(guān)可進行多個開關(guān)點測量。WIKA 浮球開關(guān) 液位傳感器

開關(guān)狀態(tài)總是隨著液位變動而進行切換： 常開型 (S) /常閉型 (O) /轉(zhuǎn)換型（U）觸點。

通過使用一個浮球就能實現(xiàn)對2個雙穩(wěn)態(tài)開關(guān)點的操作，即當液位超過或低于開關(guān)點位置時，液位開關(guān)能夠保持原來的開關(guān)狀態(tài)。

浮球液位開關(guān)安裝簡單且無需維護，因此安裝、調(diào)試和運行成本都很低。WIKA 浮球開關(guān) 液位傳感器

DescriptionA float with a permanent magnet moves reliably along with the liquid level on a guide tube. Within the guide tube is fitted a reed contact (inert gas contact), which is energised, through the non-magnetic walls of the float and guide tube, by the approach of the float magnet. By using a magnet and reed contact the switching operation is non-contact, free from wear and needs no power supply. The contacts are potentialfree. Float switches are also available with multiple switch points.The switching functions always refer to a rising liquid level: Normally open, normally closed or change-over contact.WIKA data sheet LM 30.01 ? 05/2021for further approvals see page 3Fig. left: Stainless steel version, mounting thread, model FLS-SFig. right: Plastic version, flange connection, model FLS-PThrough the use of a float for a max. of 2 switch points a bistable switch behaviour can be achieved, meaning that the switching status also remains available, when the filling level continues to rise above or drop below the switch point.The float switch is simple to mount and maintenance-free, so the costs of mounting, commissioning and operation are low.