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 Minimum Operating Temperature Maximum Operating Temperature Maximum AC Voltage Maximum DC Voltage Maximum Current Maximum Pressure Gasket Material Current Rating Hazardous Area Certification
RS-stocknr. 204-6733
Fabrikantnummer003H2
FabrikantMobrey
€ 238,84
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Gap Sensor Level Alarm Switch Horizontal, Vertical FET Polyphenylene Sulfide 3m -40°C +105°C - - 100 mA 5bar - - -
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Guided Radar Vertical 0-10 V, 4-20 mA Stainless Steel - -20°C +150°C - - 100 mA 16bar PEEK - -
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€ 335,00
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Capacitance Switch Vertical Relay Stainless Steel - -30°C +100°C - - - 10bar - - -
RS-stocknr. 124-0138
FabrikantnummerLV10-1301
FabrikantFlowline
€ 116,91
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Buoyancy Level Switch Vertical NO/NC PP 3m -40°C +90°C - - - 2bar - 250 mA -
RS-stocknr. 768-2081
FabrikantnummerPSWL61.XXBXXHKAX
FabrikantVega
€ 1.254,65
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Radar Cable - - 6m -20°C +60°C - - 131 mA - - - -
RS-stocknr. 768-2075
FabrikantnummerMET381.CX
FabrikantVega
€ 672,75
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Sensor Rail Mounting, Wall Mount Relay Plastic - -20°C +60°C - - 20 mA - - - ATEX
RS-stocknr. 768-2019
FabrikantnummerWAVES61.EEJ2RC
FabrikantVega
€ 605,62
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Vibrating Level Switch Cable Relay - - -40°C +150°C - - 1 A dc, 3 A ac 1.1bar - - ATEX
RS-stocknr. 511-5157
FabrikantnummerVLSKB131Z
FabrikantMobrey
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Solids Level Switch Horizontal, Vertical Relay Aluminium Alloy - -20°C +110°C - - 8 A 10bar - - -
RS-stocknr. 768-1971
FabrikantnummerSONS62.EXXX
FabrikantVega
€ 780,25
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Vibrating Rod Chassis Mount - ABS - -40°C +80°C - - 20 mA - - - -
RS-stocknr. 794-3415
Fabrikantnummer211000A1NA
FabrikantRosemount
€ 160,82
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Fork Level Switch Side or Top Mount Direct Load Stainless Steel - -40°C +150°C - - 500 mA 100bar - - -
RS-stocknr. 768-2072
FabrikantnummerTRENN149AEX.X
FabrikantVega
€ 250,26
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Sensor DIN Rail - - - - - - - 20 mA - - - ATEX
RS-stocknr. 377-9888
FabrikantnummerVN3
FabrikantCarlo Gavazzi
€ 53,68
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Conductive Cable - Nylon 6 2m 0°C +90°C - - - 10bar - - -
RS-stocknr. 768-2047
FabrikantnummerVIBS61.EEJ2RD
FabrikantVega
€ 631,31
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Sensor Cable Relay - - -40°C +150°C - - 1 A dc, 3 A ac 1.1bar - - ATEX
RS-stocknr. 494-1084
FabrikantnummerLLNE8651721
FabrikantHoneywell
€ 176,18
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Level Switch Exterior Mounting NPN Stainless Steel - -40°C +125°C - - 60 mA 25bar - - -
RS-stocknr. 419-4660
FabrikantnummerSWING61XXGAVXPRX
FabrikantVega
€ 515,33
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Vibrating Fork Horizontal, Vertical Relay Plastic - -50°C +150°C - - 1 A dc, 3 A ac 64bar - - -
RS-stocknr. 513-2449
Fabrikantnummer7ML5430-2BE10
FabrikantSiemens
€ 1.188,68
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Radar - - PBT - -40°C +80°C - - 20 mA 3bar - - ATEX
RS-stocknr. 354-335
FabrikantnummerF0301SUS201ELECTRODE
FabrikantOmron
€ 13,27
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Electrode Chassis Mount - Stainless Steel - - +70°C - - - - - - -
RS-stocknr. 740-6446
FabrikantnummerLMT110
Fabrikantifm electronic
€ 176,70
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Electronic Flush Mount PNP NO/NC FPM, PA12, PEEK, Stainless Steel - 0°C +60°C - - 50 mA 16bar PEEK - -
RS-stocknr. 613-3409
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FabrikantVega
€ 1.602,49
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Ultrasonic - - Plastic - -40°C +80°C - - 20 mA 2bar - - ATEX
RS-stocknr. 889-1365
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Ultrasonic Level Transmitter Vertical 2 Wire Relay Polycarbonate 1.2m -35°C +60°C - 24V 20 mA 30psi Viton - -
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