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 Minimum Operating Temperature Maximum Operating Temperature Maximum AC Voltage Maximum DC Voltage Maximum Current Maximum Pressure Gasket Material Current Rating Hazardous Area Certification
RS Stock No. 780-0175
Mfr. Part No.SSF22X100-18N
BrandCynergy3
MYR379.63
Each
units
Level Switch Vertical - Stainless Steel 1m -20°C +120°C - - 500 mA 10bar - - -
RS Stock No. 869-7696
Mfr. Part No.ILSE-G0700-5
BrandCynergy3
MYR947.01
Each
units
Pressure Chassis Mount 4-20mA Stainless Steel - - - - 32V 28 mA 50bar - - -
RS Stock No. 869-7699
Mfr. Part No.ILSE-G1000-5
BrandCynergy3
MYR849.39
Each
units
Pressure Chassis Mount 4-20mA Stainless Steel - - - - 32V 28 mA 50bar - - -
RS Stock No. 780-0387
Mfr. Part No.CW1
BrandCynergy3
MYR11.80
Each
units
Weight - - Polypropylene - -20°C - - - - 100bar - - -
RS Stock No. 756-4255
Mfr. Part No.RSF48H100RF
BrandCynergy3
MYR114.93
Each
units
Reed Horizontal Internal NO/NC Polypropylene 1m -20°C +100°C - - 1 A - Nitrile - -
RS Stock No. 869-7703
Mfr. Part No.ILSE-G0250-D
BrandCynergy3
MYR947.01
Each
units
Pressure Chassis Mount 0.5-4.5V Stainless Steel - - - - 32V - 20bar - - -
RS Stock No. 780-0298
Mfr. Part No.SM20
BrandCynergy3
MYR369.45
Each
units
- - - - - 0°C +50°C - - - - - - -
RS Stock No. 780-0179
Mfr. Part No.SSF22X100-M12X1
BrandCynergy3
MYR375.52
Each
units
Level Switch Vertical - Stainless Steel 1m -20°C +120°C - - 500 mA 10bar - - -
RS Stock No. 780-0321
Mfr. Part No.OLS210D324-003
BrandCynergy3
MYR479.33
Each
units
Optical Sensor Chassis Mount Transistor Polysulfone 250mm -40°C +125°C - - 1 A 7bar - - -
RS Stock No. 780-0324
Mfr. Part No.OLS510D3
BrandCynergy3
MYR379.25
Each
units
Optical Sensor Chassis Mount Transistor Polysulfone 250mm -40°C +125°C - - 1 A 20bar - - -
RS Stock No. 869-7652
Mfr. Part No.ILLS-G0250-5-005
BrandCynergy3
MYR1,209.15
Each
units
Pressure Cable 4-20mA Stainless Steel 5m -20°C +60°C - 32V 28 mA 20bar - - -
RS Stock No. 780-0330
Mfr. Part No.OLS210D3L24-003
BrandCynergy3
MYR379.25
Each
units
Optical Sensor Chassis Mount Transistor Polysulfone 250mm -40°C +125°C - - 1 A 7bar - - -
RS Stock No. 869-7630
Mfr. Part No.ILS-G0500-007
BrandCynergy3
MYR1,528.68
Each
units
Pressure Cable 4-20mA Stainless Steel 7m -20°C +60°C - 32V 28 mA 50bar - - -
RS Stock No. 780-0337
Mfr. Part No.OLS710D3L24-003
BrandCynergy3
MYR428.40
Each
units
Optical Sensor Chassis Mount Transistor Polysulfone 250mm -40°C +125°C - - 1 A 7bar - - -
RS Stock No. 869-7661
Mfr. Part No.ILLS-G0100-D-003
BrandCynergy3
MYR1,040.39
Each
units
Pressure Cable 0.5-4.5V Stainless Steel 3m -20°C +60°C - 32V - 20bar - - -
RS Stock No. 869-7671
Mfr. Part No.ILLS-G1000-D-015
BrandCynergy3
MYR1,268.30
Each
units
Pressure Cable 0.5-4.5V Stainless Steel 15m -20°C +60°C - 32V - 50bar - - -
RS Stock No. 869-7725
Mfr. Part No.ILTS-G1000-015
BrandCynergy3
MYR2,689.55
Each
units
Pressure Cable - Stainless Steel 15m -20°C +60°C - 32V 28 mA 50bar - - -
RS Stock No. 869-7680
Mfr. Part No.ILSE-G0100-5
BrandCynergy3
MYR1,039.80
Each
units
Pressure Chassis Mount 4-20mA Stainless Steel - - - - 32V 28 mA 20bar - - -
RS Stock No. 780-0327
Mfr. Part No.OLS510D3L
BrandCynergy3
MYR476.00
Each
units
Optical Sensor Chassis Mount Transistor Polysulfone 250mm -40°C +125°C - - 1 A 20bar - - -
RS Stock No. 780-0292
Mfr. Part No.SB20
BrandCynergy3
MYR262.27
Each
units
- - - - - 0°C +50°C - - - - - - -