Level Sensors

Level sensors determine how full or how empty a container is. Level sensors provide an output electrical signal at predetermined levels to communicate when to open or close control valves.


Level Sensor Types


The choice of sensors is usually determined by which substance is being measured, the environment in which the sensor is to used and in which position the sensor needs to be mounted. Some of the most common level sensors are:


Capacitive level switches


  • Capacitive level switches provide a basic full/empty level indication determined by the mounting position of the sensor. This type of switch is non-contact and uses a sensing field to determine liquid levels. Capacitive sensors provide accurate switching even with heavy residue build-up.

Vibrating level probes


  • Vibrating level probes use a rod or a fork that constantly produce high-frequency vibrations. When the vibrating probe comes into contact with the medium, the vibration changes and the vibrating level switch outputs a switching command. Vibrating level switches are used as overfill protection devices or low-level indicators in liquids as well as in granular and powder bulk solids.

Conductive level switches


  • Conductive level switches are sensors that use stainless steel probes with an electrical contact output to measure a specific liquid level. Used in conjunction with a level control relay to set and monitor each probe. Applications include ponds, reservoirs, sumps, pharmaceuticals, closed vessels and open tanks.

Ultrasonic level sensors


  • Ultrasonic level sensors generate ultrasonic sound pulses that are reflected by the surface of a liquid medium. The time travelled by the ultrasonic pulse is calculated by the sensor which then determines the distance of the liquid to give an accurate fill level. The ultrasonic sensor’s response is influenced by turbulence, pressure, moisture, and temperature.

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Description Price Device Type Mounting Type Switch Output Body Material Cable Length Communication Protocol Minimum Operating Temperature Maximum Operating Temperature Maximum AC Voltage Maximum DC Voltage Maximum Current Maximum Pressure Gasket Material Measurement Range
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RS庫存編號 210-3150
製造零件編號224505
HK$439.49
單位
Electro-Optic 1/4 MNPT Direct Load Polysulfone 120mm - - - - - - - - -
RS庫存編號 889-1431
製造零件編號LC42-1001
BrandFlowline
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單位
Remote Level Controller DIN Rail NO/NC, SPDT Relay Polypropylene - - -40°C +70°C - 13.5V 27 mA - - -
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製造零件編號ILS-G0500-007
BrandCynergy3
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Pressure Cable 4-20mA Stainless Steel 7m - -20°C +60°C - 32V 28 mA 50bar - -
RS庫存編號 776-1610
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BrandFinder
HK$369.05
單位
- - - - - - - - - - - - - -
RS庫存編號 768-1965
製造零件編號SONS61.EXXA
BrandVega
HK$8,568.82
單位
Vibrating Rod - Relay - - - - - - - 20 mA - - -
RS庫存編號 794-3415
製造零件編號211000A1NA
BrandRosemount
HK$1,544.38
單位
Fork Level Switch Side or Top Mount Direct Load Stainless Steel - - -40°C +150°C - - 500 mA 100bar - -
RS庫存編號 208-5482
製造零件編號PIEZOAS0-4mh20-10M
BrandATMI
HK$5,022.23
單位
Piezometric Cable Mount - Stainless Steel 316L 10m - - - - - - - - -
全新
RS庫存編號 210-7475
製造零件編號7ML5725-1ZC11-1AD0
BrandSiemens
HK$5,057.10
單位
Level Switch Side or Top Mount - Stainless Steel - - - - - - - - - -
RS庫存編號 892-9381
製造零件編號5301HA2S1V5AM01000SANAW2
BrandRosemount
HK$19,281.83
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Guided Wave Radar Top Mount - Polyurethane-covered Aluminium 10m - -15°C +150°C - 42.4V - 40bar - -
RS庫存編號 193-6753
製造零件編號LLC610D324-003
HK$500.38
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Liquid Level Switch Threaded Mount NPN Polysulfone - - -40°C +125°C - 30V 7.5 mA 7bar - -
RS庫存編號 889-1362
製造零件編號DL34-00
BrandFlowline
HK$6,172.91
單位
Ultrasonic Level Sensor Vertical 2 Wire Relay Polycarbonate 1.2m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS庫存編號 857-3360
製造零件編號VNY3
HK$2,206.76
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Conductive Chassis Mount Relay Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS庫存編號 175-5065
製造零件編號PFT-FRBX25SF1OSSAMSSZ
BrandSick
HK$3,338.91
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Hydrostatic Level Sensor G1 Thread 2 Wire, 4 to 20 mA Stainless Steel 1.4571 - - -20°C +80°C - 30V 20 mA 0.25bar - -
RS庫存編號 768-1962
製造零件編號SONS61.EEEA
BrandVega
HK$10,281.31
單位
Vibrating Rod - Relay - - - - - - - 20 mA - - -
RS庫存編號 124-0136
製造零件編號LR30-0010-10
BrandFlowline
HK$27,954.89
單位
Pulse Radar Level Transmitter Flange Mount - Nylon 10m - -40°C +100°C - 26V 20 mA - Silicone -
RS庫存編號 186-0287
製造零件編號7ML5110-1GF07-4AF3
BrandSiemens
HK$17,121.78
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Ultrasonic - - PBT, PC - Hart -40°C +80°C - 30V - 0.5bar - -
RS庫存編號 869-7621
製造零件編號ILS-G0250-005
BrandCynergy3
HK$4,414.80
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Pressure Cable 4-20mA Stainless Steel 5m - -20°C +60°C - 32V 28 mA 20bar - -
RS庫存編號 182-5618
製造零件編號PS64.ACTTCAHXKMXXX
BrandVega
HK$35,890.05
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Level Sensor 1.5 BSP/G Thread 2 Wire, 4 to 20 mA PTB VALOX - - -40°C +130°C - 35V 22 mA 20bar - -
RS庫存編號 189-2700
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BrandBaumer
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Level Switch G 1/2" Fitting PNP Stainless Steel - - -40°C +85°C - 30V 50 mA 5bar - -
RS庫存編號 468-3457
製造零件編號SN62XXAGVDMA
BrandVega
HK$16,409.93
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Ultrasonic - - Aluminium - - -40°C +80°C - - 20 mA 2bar - -