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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Omschrijving Prijs 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-stocknr. 780-0179
FabrikantnummerSSF22X100-M12X1
FabrikantCynergy3
68,63 €
Each
Aantal stuks
Level Switch Vertical - Stainless Steel 1m - -20°C +120°C - - 500 mA 10bar - -
RS-stocknr. 780-0315
FabrikantnummerOLS700D3LSH
FabrikantCynergy3
41,61 €
Each
Aantal stuks
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -25°C +80°C - - 100 mA 7bar - -
RS-stocknr. 493-6802
FabrikantnummerSG51.XXSGBTPV
FabrikantVega
241,39 €
Each
Aantal stuks
Tuning Fork Horizontal PNP Stainless Steel - - -40°C +100°C - - 250 mA 64bar - -
RS-stocknr. 857-7781
FabrikantnummerVP02E
FabrikantCarlo Gavazzi
129,40 €
Each
Aantal stuks
Optical Sensor Cable NPN Polysulfone 2m - -20°C +80°C - - 200 mA 10bar - -
RS-stocknr. 354-290
FabrikantnummerPS31SUS3041000MM
FabrikantOmron
38,51 €
1 Kit
Kit(s)
Electrode Chassis Mount - Phenol Resin, Stainless Steel - - - +70°C - - - - - -
RS-stocknr. 889-1346
FabrikantnummerDL10-11
FabrikantFlowline
306,80 €
Each
Aantal stuks
Ultrasonic Level Transmitter Vertical - Polycarbonate 1.2m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS-stocknr. 780-0387
FabrikantnummerCW1
FabrikantCynergy3
3,24 €
Each
Aantal stuks
Weight - - Polypropylene - - -20°C - - - - 100bar - -
RS-stocknr. 613-3522
FabrikantnummerSG51.XXSGATPV
FabrikantVega
251,40 €
Each
Aantal stuks
Tuning Fork Horizontal PNP Stainless Steel - - -40°C +100°C - - 250 mA 64bar - -
RS-stocknr. 780-0305
FabrikantnummerOLS500D3L
FabrikantCynergy3
41,61 €
Each
Aantal stuks
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -25°C +80°C - - 100 mA 20bar - -
RS-stocknr. 889-1393
FabrikantnummerDX10-00-8FT
FabrikantFlowline
295,22 €
Each
Aantal stuks
Ultrasonic Level Sensor Vertical - Polycarbonate 1.2m - -35°C +60°C - 24V 15 (Nominal) mA 30psi Viton -
RS-stocknr. 906-8042
Fabrikantnummer01950
FabrikantGems Sensors
93,60 €
Each
Aantal stuks
Level Switch Vertical SPST NO Stainless Steel 24in - -40°C +149°C - - - 750psi - -
RS-stocknr. 889-1362
FabrikantnummerDL34-00
FabrikantFlowline
624,51 €
Each
Aantal stuks
Ultrasonic Level Sensor Vertical 2 Wire Relay Polycarbonate 1.2m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS-stocknr. 740-6446
FabrikantnummerLMT110
Fabrikantifm electronic
180,18 €
Each
Aantal stuks
Electronic Flush Mount PNP NO/NC FPM, PA12, PEEK, Stainless Steel - - 0°C +60°C - - 50 mA 16bar PEEK -
RS-stocknr. 794-3415
Fabrikantnummer211000A1NA
FabrikantRosemount
166,50 €
Each
Aantal stuks
Fork Level Switch Side or Top Mount Direct Load Stainless Steel - - -40°C +150°C - - 500 mA 100bar - -
RS-stocknr. 780-0175
FabrikantnummerSSF22X100-18N
FabrikantCynergy3
68,63 €
Each
Aantal stuks
Level Switch Vertical - Stainless Steel 1m - -20°C +120°C - - 500 mA 10bar - -
RS-stocknr. 907-3937
Fabrikantnummer79999
FabrikantGems Sensors
140,40 €
Each
Aantal stuks
Level Switch Vertical SPST NO Stainless Steel 600mm - -40°C +249°C - - - 750psi - -
RS-stocknr. 204-6749
Fabrikantnummer003S2
FabrikantDelta-Mobrey
239,20 €
Each
Aantal stuks
Gap Sensor Level Alarm Switch Horizontal, Vertical Relay Polyphenylene Sulfide 3m - -20°C +70°C - - 1 A 5bar - -
RS-stocknr. 780-0302
FabrikantnummerOLS500D3
FabrikantCynergy3
41,61 €
Each
Aantal stuks
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -25°C +80°C - - 100 mA 20bar - -
RS-stocknr. 794-3418
Fabrikantnummer211001A1NA
FabrikantRosemount
168,13 €
Each
Aantal stuks
Fork Level Switch Side or Top Mount Direct Load Stainless Steel - - -40°C +150°C - - 500 mA 100bar - -
RS-stocknr. 794-3392
FabrikantnummerLFP2000-A4NMB
FabrikantSick
380,00 €
Each
Aantal stuks
Guided Radar Vertical 0-10 V, 4-20 mA PBT - IO-LINK -20°C +100°C - - 100 mA 10bar PTFE -