Level Sensors
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 Sensing、Flowline、Vega、Sick、Gems Sensors等任君挑選，可滿足不同的應用場景需求。
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1481 産品
1481 産品
比較 產品詳述 單價 | Brand | Device Type | Mounting Type | Switch Output | Body Material | Cable Length | Communication Protocol | Minimum Operating Temperature | Maximum Operating Temperature | Maximum AC Voltage | Maximum DC Voltage | Thread Size | Maximum Current | Maximum Pressure | Process Connection | Gasket Material | Measurement Range | For Use With | Hazardous Area Certification | Series |
|---|
个 HK$3,854.10 | Endress+Hauser | Capacitance | Flush Mount | PNP | Stainless Steel 316L | - | - | - | - | - | - | - | - | - | - | - | - | - | - | Liquipoint FTW33 |
个 HK$2,778.20 | Endress+Hauser | Vibronic Point Level Detection | DIN Rail | - | Polycarbonate, Polypropylene | 1000m | - | - | - | - | - | - | - | - | - | - | - | - | ATEX | Nivotester FTL325N |
个 HK$5,699.79 | Turck | Ultrasonic | - | - | Stainless Steel | - | - | - | - | - | - | - | - | - | - | - | - | - | - | LUS211 |
个 HK$1,924.30 | Endress+Hauser | Level Switch | DIN Rail | PNP | PP | - | - | - | - | - | - | - | - | - | - | - | - | - | - | Nivotester |
个 HK$6,006.00 | Endress+Hauser | Vibronic | Threaded Mount | PNP | PTB-FR | - | - | - | - | - | - | - | - | - | - | - | - | - | ATEX, IECEx | Soliphant T FTM20 |
个 HK$4,998.00 | SICK | Vibrating Level Switch | G1 Thread, Vertical/Horizontal | PNP NO/NC | PEI, Stainless Steel | - | - | -40°C | +150°C | - | 35V | - | 250 mA | 64bar | - | - | - | - | - | LFV200 |
个 HK$11,641.70 | Flowline | Radar | Flange Mount | Modbus | Polybutylene Terephthalate | - | - | - | - | - | - | - | - | - | - | - | - | - | - | LR85 |
个 HK$2,457.00 | Endress+Hauser | Vibronic | Flush Mount | PNP | Stainless Steel 316L | 5m | - | - | - | - | - | - | - | - | - | - | - | - | - | Liquiphant FTL31 |
个 HK$3,317.72 | Endress+Hauser | Vibronic | Flush Mount | PNP | Stainless Steel 316L | 5m | - | - | - | - | - | - | - | - | - | - | - | - | - | FTL33 |
个 HK$4,737.30 | Endress+Hauser | Point Level | Threaded Mount | Binary | Polycarbonate | - | - | - | - | - | - | - | - | - | - | - | - | - | ATEX | Soliswitch FTE20 |
个 HK$4,062.80 | Endress+Hauser | Capacitance | Wall Mount | PNP | PBT-FR | - | - | - | - | - | - | - | - | - | - | - | - | - | ATEX | Minicap FTC260 |
个 HK$4,897.10 | Endress+Hauser | Capacitance | Wall Mount | PNP | PBT-FR | - | - | - | - | - | - | - | - | - | - | - | - | - | ATEX | Minicap FTC262 |
个 HK$7,647.20 | Flowline | Ultrasonic Level Transmitter | Vertical | - | Polycarbonate | 3m | - | -35°C | +60°C | - | 24V | - | 20 mA | 30psi | - | Viton | - | - | - | EchoSonic |
N 
个 HK$2,002.00 | Endress+Hauser | Vibronic Level Switch | - | - | 316L, PPSU | 5m | - | - | - | - | - | - | - | - | - | - | - | - | - | FTL31 |
N 
个 HK$15,196.20 | Endress+Hauser | Radar Level Sensor | Screwing | - | PTFE | 5m | - | - | - | - | - | - | - | - | - | - | - | - | ATEX | FMR43 |
个 HK$9,700.00 | SICK | Guided Radar | Vertical | 0-10 V, 4-20 mA | PBT | - | IO-LINK | -20°C | +100°C | - | - | - | 100 mA | 10bar | - | PTFE | 1000mm | - | - | - |
个 HK$4,223.40 | Endress+Hauser | Point Level | Threaded Mount | Binary | Polycarbonate | - | - | - | - | - | - | - | - | - | - | - | - | - | ATEX | Soliswitch FTE20 |
个 HK$1,945.40 | Vega | Impedance Switch | 1/2" G/BSP Thread | PNP | Stainless Steel | - | IO-LINK | -40°C | +115°C | - | 35V | - | - | 25bar | - | Klingersil | - | Solids | - | VEGAPOINT 31 |
N 
个 HK$13,187.46 | SICK | Level Sensor | Threaded | 2x NPN/PNP | Stainless Steel | - | - | -40°C | +70°C | - | 35V | M12 | - | 16bar | - | - | - | Industrial Use | - | LXRC |
个 HK$2,457.00 | Endress+Hauser | Vibronic | Flush Mount | PNP | Stainless Steel 316L | 5m | - | - | - | - | - | - | - | - | - | - | - | - | - | Liquiphant FTL31 |
