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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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 |
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个 HK$7,400.00 | SICK | Vibrating Level Switch | 1.5" Triclamp | PNP | PEI, Stainless Steel 1.4404 | - | IO-LINK | -40°C | +70°C | - | 30V | - | 250 mA | 64bar | - | - | - | - | - | LFV200 |
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$1,993.20 | SICK | Capacitive Level Switch | - | NPN, PNP | Stainless Steel | - | - | -40°C | +70°C | - | 12 → 35V | M12 | - | 25bar | - | - | - | - | - | LFC |
个 HK$10,500.00 | SICK | Vibrating Level Switch | Vertical/Horizontal G1 1/2 Thread | DPDT Relay | Aluminium, Stainless Steel | - | - | -50°C | +150°C | 253V | 72V | - | <3A AC/<1A DC | 25bar | - | - | - | - | - | LBV310 |
个 HK$1,993.20 | SICK | Capacitive Level Switch | - | NPN, PNP | Stainless Steel | - | - | -40°C | +70°C | - | 12 → 35V | M12 | - | 25bar | - | - | - | - | - | LFC |
个 HK$9,700.00 | SICK | Guided Radar | Vertical | 0-10V, 2 PNP, 4-20mA, NPN | PBT | - | IO-LINK | -20°C | +100°C | - | - | - | 100 mA | 10bar | - | PTFE | 500mm | - | - | - |
个 HK$4,917.50 | SICK | TDR Level Sensor | - | NPN, PNP | Plastic PBT | 700mm | - | -20°C | +60°C | - | 12 → 30V | M12 | - | 10bar | Probe | - | - | - | - | LFP0700 |
个 HK$4,413.70 | SICK | TDR Level Sensor | - | NPN, PNP | Plastic PBT | 25mm | - | -20°C | +60°C | - | 12 → 30V | M12 | - | 10bar | Probe | - | - | - | - | LFP0025 |
个 HK$4,917.50 | SICK | TDR Level Sensor | Probe Mount | PNP | Plastic PBT | 300mm | IO-LINK | -20°C | +100°C | - | 30V | 3/4 in NPT | - | 10bar | NPT 3/4 | - | - | - | - | LFP0300 |
个 HK$5,202.00 | SICK | Vibrating Level Switch | G1 Thread | PNP | PEI, Stainless Steel 1.4404 | - | IO-LINK | -40°C | +70°C | - | 30V | - | 250 mA | 64bar | - | - | - | - | - | LFV200 |
个 HK$4,917.50 | SICK | TDR Level Sensor | - | NPN, PNP | Plastic PBT | 600mm | - | -20°C | +60°C | - | 12 → 30V | M12 | - | 10bar | Probe | - | - | - | - | LFP0600 |
N SICK G6 Series Miniature Photoelectric Sensor Level Sensors, PNP Output, Threaded, ABS, Plastic Body
个 HK$12,641.14 | SICK | Miniature Photoelectric Sensor | Threaded | PNP | ABS, Plastic | 2m | - | -30°C | +55°C | - | 30V | - | - | - | - | - | - | Industrial Use | - | G6 |
个 HK$7,348.80 | SICK | Ultrasonic Level Sensor | - | PNP | Stainless Steel | - | - | -25°C | +70°C | - | 9 → 30V | M12 | - | 6bar | - | - | - | - | - | UP56 |
个 HK$5,235.10 | SICK | TDR Level Sensor | - | NPN, PNP | Plastic PBT | 700mm | - | -20°C | +60°C | - | 12 → 30V | M12 | - | 10bar | Probe | - | - | - | - | LFP0700 |
个 HK$10,300.00 | SICK | Vibrating Level Switch | Vertical/Horizontal G1 1/2 Thread | DPDT Relay | Plastic, Stainless Steel | - | - | -50°C | +150°C | 253V | 72V | - | <3A AC/<1A DC | 25bar | - | - | - | - | - | LBV310 |
个 HK$2,902.30 | SICK | TDR Level Sensor | Threaded | PNP | Stainless Steel | 67mm | - | -40°C | +100°C | - | 35V | M12 | - | 64bar | NPT 3/4 | - | - | - | - | LFV200 |
个 HK$4,896.00 | SICK | Vibrating Level Switch | G3/4 Thread | PNP | PEI, Stainless Steel 1.4404 | - | IO-LINK | -40°C | +70°C | - | 30V | - | 250 mA | 64bar | - | - | - | - | - | LFV200 |
个 HK$12,342.00 | SICK | Ultrasonic Level Sensor with display | G1 Thread | 0-10, 4 to 20 mA, PNP | PBT, Stainless Steel 1.4571, TPU | - | - | -25°C | +70°C | - | 30V | - | 20 mA | 6bar | - | - | 1.3m | - | - | UP56 |
N SICK G6 Series Miniature Photoelectric Sensor Level Sensors, PNP Output, Threaded, ABS, Plastic Body
个 HK$13,187.46 | SICK | Miniature Photoelectric Sensor | Threaded | PNP | ABS, Plastic | 300mm | - | -30°C | +55°C | - | 30V | M8 | - | - | - | - | - | Industrial Use | - | G6 |
N
个 HK$13,947.61 | SICK | Level Sensor | Threaded | 2x NPN/PNP | Stainless Steel | - | - | -40°C | +70°C | - | 35V | M12 | - | 16bar | - | - | - | Industrial Use | - | LXRC |