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    液位感測器(亦稱「液位計」、「液位偵測器」)是一種用來監控、測量、和維持液位的儀器;它能確認容器、儲罐或料倉是否被裝滿。當液體達到預設的水位時,液位感測器便會自動發出信號,提醒使用者開啟(或關閉)控制閥。 

    液位感測器的種類 

    液位感測器有不同的種類,一般會根據要測量的液體類型、使用環境、和安裝位置而有所分別。不同的測量方法亦有專用的液位感測器,例如電容式、導波雷達、磁力翻板、平板型液位感測器(靜電容式開關)、或壓力式液位測量。以下是最常見的液位感測器類型: 

    電容式液位計 

    電容式液位計會通過感測器的安裝位置來提供基本的滿/空液位指示。電容式液位計通常都是非接觸式的,它會使用感應器來確定液位。即使在有殘留物積累,感測器也能準確地進行測量。 

    音叉式液位計 

    音叉式液位計會透過一根棒或叉去進行高頻率的振動。當探頭接觸到介質時,振動頻率便會發生變化,這時音叉式液位計就會輸出切換指令。音叉式液位計一般會用作防止液體滿溢、或作為低液位指示器使用;它亦適用於測量顆粒和粉末狀的固體物料。 

    電極式液位計 

    電極式液位計使用不銹鋼、且能發出電力的感測探頭,來測量特定的液位。電極式液位計通常會與液位控制繼電器一起使用,以設定和監控每個探針。它通常用作測量池塘、水庫、集水井、製藥業、封閉容器和開放式儲罐的液位。 

    超音波液位計 

    超音波液位計的原理是透過向液體發射超音波,然後計算脈衝從液體表面反射回來的所需時間,從而去確定液體的距離,以提供準確的測量結果。需注意,超音波感測器的反應可能會因湍流、壓力、濕度和溫度的變化而受到影響。 

    液位感測器的應用 

    液位感測器的常見應用領域包括:  

    • 製造業
    • 汽車工業
    • 水處理
    • 製藥過程
    • 發電廠

    選購各款精選液位感測器 

    RS 歐時提供一系列不同規格和型號的液位感測器,品牌包括SSt SensingFlowlineVegaSickGems Sensors等任君挑選,可滿足不同的應用場景需求。 

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