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. 857-7781
FabrikantnummerVP02E
FabrikantCarlo Gavazzi
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Optical Sensor Cable NPN Polysulfone 2m - -20°C +80°C - - 200 mA 10bar - -
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Conductive DIN Rail DPDT Relay ABS 100m - -20°C +50°C - - 8 A - - -
RS-stocknr. 188-5257
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FabrikantCarlo Gavazzi
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Conductive Cable - Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS-stocknr. 857-3360
FabrikantnummerVNY3
FabrikantCarlo Gavazzi
187,45 €
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Conductive Chassis Mount Relay Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS-stocknr. 377-9793
FabrikantnummerVC5510NNOP
FabrikantCarlo Gavazzi
47,15 €
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Capacitance - NPN ABS, Polycarbonate 1.5m - 0°C +50°C - 30V 100 mA - - -
RS-stocknr. 188-5255
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80,94 €
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Conductive Plug PNP Plastic 300mm - -25°C +80°C - 30V 13 mA - - 100 mA
RS-stocknr. 377-9872
FabrikantnummerVN2
FabrikantCarlo Gavazzi
43,09 €
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Conductive Cable - Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS-stocknr. 859-3465
FabrikantnummerVP01EP
FabrikantCarlo Gavazzi
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- - - - - - - - - - - - - -
RS-stocknr. 377-9894
FabrikantnummerVN4
FabrikantCarlo Gavazzi
62,58 €
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Conductive - - Nylon 6 2m - 0°C +90°C - - - 10bar - -
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. 377-9822
FabrikantnummerVC5510PNOPT
FabrikantCarlo Gavazzi
47,15 €
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Capacitance - PNP ABS, Polycarbonate 1.5m - 0°C +50°C - 30V 100 mA - - -
RS-stocknr. 857-3590
FabrikantnummerVNI4
FabrikantCarlo Gavazzi
262,43 €
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Conductive Cable Relay Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS-stocknr. 377-9816
FabrikantnummerVC5510PNOP
FabrikantCarlo Gavazzi
47,15 €
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Capacitance Switch Chassis Mount PNP ABS/Polycarbonate 1.5m - 0°C +50°C - 30V 100 mA - - -
RS-stocknr. 857-3212
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FabrikantCarlo Gavazzi
157,62 €
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Conductive Chassis Mount Relay PVC 2m - 0°C +60°C - - - 2bar - -
RS-stocknr. 377-9800
FabrikantnummerVC5510NNOPT
FabrikantCarlo Gavazzi
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Capacitance - NPN ABS, Polycarbonate 1.5m - 0°C +50°C - 30V 100 mA - - -