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 Stock No. 892-9372
Mfr. Part No.3301HA2S1V5AM01000SANAW2
kr 14 649,44
Each
Units
Guided Wave Radar Top Mount - Polyurethane-covered Aluminium 10m - -15°C +150°C - 42V - 40bar - -
RS Stock No. 124-0133
Mfr. Part No.LR15-0010-20
BrandFlowline
kr 33 593,52
Each
Units
Pulse Radar Level Transmitter Flange Mount - Aluminium - - -60°C +150°C - 26V 20 mA 10.3bar Silicone 22.5 mA
RS Stock No. 124-0119
Mfr. Part No.LG11-2003-01
BrandFlowline
kr 11 115,94
Each
Units
Guided Radar Level Sensor Vertical - Aluminium 5.5m - -40°C +85°C - 30V 20 mA 17bar - <50 mA
RS Stock No. 889-1330
Mfr. Part No.DL10-00
BrandFlowline
kr 3 452,51
Each
Units
Ultrasonic Level Transmitter Vertical - Polycarbonate 1.2m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS Stock No. 869-7659
Mfr. Part No.ILLS-G0750-5-010
BrandCynergy3
kr 3 467,92
Each
Units
Pressure Cable 4-20mA Stainless Steel 10m - -20°C +60°C - 32V 28 mA 50bar - -
RS Stock No. 768-2069
Mfr. Part No.SWINGS52.EEA7CV
BrandVega
kr 3 472,28
Each
Units
Level Switch Chassis Mount PNP - - - - +150°C - - - - - -
RS Stock No. 892-9366
Mfr. Part No.2160XD8SS1NNBA00001NAWA3WK1M5
kr 13 060,11
Each
Units
Fork Level Detector Side or Top Mount Relay Aluminium - - -40°C +150°C - - - 100bar Non Asbestos Carbon Fibre -
RS Stock No. 889-1374
Mfr. Part No.DS14-00
BrandFlowline
kr 3 735,43
Each
Units
Controller, Ultrasonic Level Switch Vertical - Polycarbonate 1.2m - -35°C +60°C 24V 24V - 30psi Viton 1 A
RS Stock No. 804-3866
Mfr. Part No.7ML5650-1BA00-0HB0
BrandSiemens
kr 9 059,95
Each
Units
Capacitance Switch Vertical Relay Stainless Steel - - -40°C +400°C - - - 35bar - -
RS Stock No. 906-8165
Mfr. Part No.160950
kr 312,26
Each
Units
Level Switch Horizontal SPST Zinc Alloy 24in - -40°C +121°C - - - 100psi - -
RS Stock No. 407-2368
Mfr. Part No.LA9RM201
kr 635,04
Each
Units
Electrode Cable Suspension - - - - - +100°C - - - - - -
RS Stock No. 889-1362
Mfr. Part No.DL34-00
BrandFlowline
kr 6 225,92
Each
Units
Ultrasonic Level Sensor Vertical 2 Wire Relay Polycarbonate 1.2m - -35°C +60°C - 24V 20 mA 30psi Viton -
RS Stock No. 616-3028
Mfr. Part No.208995
kr 532,90
Each
Units
Electro Optic Horizontal, Vertical - Polyethersulfone - - -40°C +125°C - - 18 mA 250psi - -
RS Stock No. 419-4654
Mfr. Part No.SWING61XXGBVXPRX
BrandVega
kr 5 111,92
Each
Units
Vibrating Rod Horizontal, Vertical Relay Plastic - - -50°C +150°C - - 1 A dc, 3 A ac 64bar - -
RS Stock No. 857-3360
Mfr. Part No.VNY3
kr 1 924,78
Each
Units
Conductive Chassis Mount Relay Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS Stock No. 463-5470
Mfr. Part No.3UG3207-2B
BrandSiemens
kr 1 395,80
Each
Units
Electrode Horizontal - - 2m - - +90°C - - - 10bar PTFE -
RS Stock No. 122-8416
Mfr. Part No.090-0024
kr 1 367,39
Each
Units
Level Switch Side - Brass 1m - -40°C +100°C - - - 16bar - -
RS Stock No. 768-2000
Mfr. Part No.WAVES61.EEJ2RA
BrandVega
kr 4 923,70
Each
Units
Vibrating Level Switch Cable Relay - - - -40°C +150°C - - 1 A dc, 3 A ac 1.1bar - -
RS Stock No. 137-2046
Mfr. Part No.US06-0003-01
BrandFlowline
kr 13 746,93
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Units
Reflective Ultrasonic Liquid Level Transmitter Horizontal, Vertical 2 Wire, 4 to 20 mA, HART 7 Aluminium - - -40°C +80°C - 28V 20 mA 2bar - -
RS Stock No. 177-9139
Mfr. Part No.9038CG32
kr 4 622,69
Each
Units
Mechanical Alternator Screw In 4 NC DPST Painted Cold-Rolled Steel - - -22°F +220°F 230 (Single Phase) V, 475 (3 Phase) V 230V - - - -