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 Current Rating
RS庫存編號 776-1604
製造零件編號072.11
BrandFinder
HK$147.93
單位
Sensor Surface Mount Relay Stainless Steel 200m - 0°C +100°C - - 30 A - - -
RS庫存編號 780-0175
製造零件編號SSF22X100-18N
BrandCynergy3
HK$705.70
單位
Level Switch Vertical - Stainless Steel 1m - -20°C +120°C - - 500 mA 10bar - -
RS庫存編號 889-1352
製造零件編號DL14-10
BrandFlowline
HK$4,099.14
單位
Multi Function Ultrasonic Transmitter Vertical Relay Polycarbonate 1.2m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS庫存編號 889-1390
製造零件編號DX10-10
BrandFlowline
HK$3,289.24
單位
Ultrasonic Level Sensor Vertical - Polycarbonate 1.2m - -35°C +60°C - 24V 15 (Nominal) mA 30psi Viton -
全新
RS庫存編號 213-3276
製造零件編號LFP0300-A4NMB
BrandSick
HK$4,180.07
單位
Guided Radar G3/4 Thread, Vertical - Plastic PBT - IO-LINK -20°C +100°C - 30V 100 mA 10bar PTFE 100 mA
RS庫存編號 892-9381
製造零件編號5301HA2S1V5AM01000SANAW2
HK$18,391.25
單位
Guided Wave Radar Top Mount - Polyurethane-covered Aluminium 10m - -15°C +150°C - 42.4V - 40bar - -
RS庫存編號 193-6732
製造零件編號LLC102000
HK$400.40
單位
Liquid Level Switch Threaded Mount Transistor Polysulfone - - -25°C +80°C - 15.4V 2.5 mA 7bar - 2.5 mA
全新
RS庫存編號 206-7073
製造零件編號RA - 222 2E8
BrandVega
HK$7,628.04
單位
Ultrasonic/Radar G1.5 Thread HART PVDF 5m - -40°C +80°C - 35V 20 mA 3bar FKM -
RS庫存編號 124-0142
製造零件編號LO10-1305
BrandFlowline
HK$1,561.66
單位
Flowline Detection Switch Vertical NO/NC PP 3m - -40°C +80°C - 36V - 10bar FKM 25 mA
全新
RS庫存編號 213-3277
製造零件編號LFP0300-A5NMC
BrandSick
HK$4,444.03
單位
Guided Radar G3/4 Thread, Vertical - Plastic PBT - IO-LINK -20°C +100°C - 30V 100 mA 10bar PTFE 100 mA
RS庫存編號 889-1166
製造零件編號LU10-1405
BrandFlowline
HK$2,957.03
單位
Ultrasonic Level Switch Cable - Polypropylene 3m - -40°C +80°C - 36V - 150psi Viton 500 mA
RS庫存編號 124-0124
製造零件編號LU23-01
BrandFlowline
HK$5,728.94
單位
Ultrasonic Level Transmitter Vertical - PC - - -35°C +60°C - 24V 20 mA 2bar FKM -
全新
RS庫存編號 206-7068
製造零件編號CP - 222 238
BrandVega
HK$1,930.27
單位
Impedance Switch G1 Thread PNP Stainless Steel - IO-LINK -40°C +115°C - 35V - 25bar - -
RS庫存編號 794-3392
製造零件編號LFP2000-A4NMB
BrandSick
HK$4,321.82
單位
Guided Radar Vertical 0-10 V, 4-20 mA PBT - IO-LINK -20°C +100°C - - 100 mA 10bar PTFE -
RS庫存編號 889-1431
製造零件編號LC42-1001
BrandFlowline
HK$2,273.41
單位
Remote Level Controller DIN Rail NO/NC, SPDT Relay Polypropylene - - -40°C +70°C - 13.5V 27 mA - - -
RS庫存編號 193-6733
製造零件編號LLC103000
HK$400.40
單位
Liquid Level Switch Threaded Mount Transistor Polysulfone - - -25°C +80°C - 15.4V 2.5 mA 7bar - 2.5 mA
RS庫存編號 616-3028
製造零件編號208995
HK$407.26
單位
Electro Optic Horizontal, Vertical - Polyethersulfone - - -40°C +125°C - - 18 mA 250psi - -
RS庫存編號 869-7693
製造零件編號ILSE-G0100-D
BrandCynergy3
HK$1,844.12
單位
Pressure Chassis Mount 0.5-4.5V Stainless Steel - - - - - 32V - 20bar - -
RS庫存編號 804-3976
製造零件編號7ML5731-1AA11-1DA0
BrandSiemens
HK$9,908.71
單位
Vibrating Level Switch Vertical PNP Stainless Steel - - -40°C +150°C - - 5 A 10bar - -
RS庫存編號 193-6782
製造零件編號LLG610D324-004-D
HK$1,887.60
單位
Liquid Level Switch Threaded Mount PNP Stainless Steel 316L - - -40°C +125°C - 30V 7.5 mA 100bar - 7.5 mA