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. 386-957
Mfr. Part No.WAVES61.EXX2RA
BrandVega
kr 3 715,57
Each
Units
Tuning Fork Horizontal Relay Aluminium/PBT - - -40°C +80°C - - 1 A dc, 3 A ac 25bar - -
RS Stock No. 613-3386
Mfr. Part No.SG51.XXTGATPVL
BrandVega
kr 2 897,34
Each
Units
Tuning Fork Horizontal PNP Stainless Steel - - -40°C +150°C - - 20 mA 64bar - -
RS Stock No. 768-2038
Mfr. Part No.VIBS61.EEJ2RC
BrandVega
kr 7 253,46
Each
Units
Sensor Cable Relay Stainless Steel - - -40°C +150°C - - 1 A dc, 3 A ac 1.1bar - -
RS Stock No. 613-3522
Mfr. Part No.SG51.XXSGATPV
BrandVega
kr 2 374,21
Each
Units
Tuning Fork Horizontal PNP Stainless Steel - - -40°C +100°C - - 250 mA 64bar - -
RS Stock No. 794-3418
Mfr. Part No.211001A1NA
BrandRosemount
kr 1 603,24
Each
Units
Fork Level Switch Side or Top Mount Direct Load Stainless Steel - - -40°C +150°C - - 500 mA 100bar - -
RS Stock No. 419-4660
Mfr. Part No.SWING61XXGAVXPRX
BrandVega
kr 5 137,41
Each
Units
Vibrating Fork Horizontal, Vertical Relay Plastic - - -50°C +150°C - - 1 A dc, 3 A ac 64bar - -
RS Stock No. 780-0318
Mfr. Part No.OLS200D3LSH
BrandCynergy3
kr 384,34
Each
Units
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -25°C +80°C - - 100 mA 7bar - -
RS Stock No. 780-0309
Mfr. Part No.OLS200D3SH
BrandCynergy3
kr 384,34
Each
Units
Optical Sensor Chassis Mount Transistor Polysulfone 250mm - -25°C +80°C - - 100 mA 7bar - -
RS Stock No. 285-778
Mfr. Part No.FFAK 16 PTD 1099/L
BrandBaumer
kr 1 606,47
Each
Units
Liquid Level Sensor Vertical/Horizontal PNP Polysulphone - - 0°C +65°C - - 200 mA 10bar - -
RS Stock No. 493-6846
Mfr. Part No.FX-S.61C 2M
BrandVega
kr 1 864,49
Each
Units
Radar - - PBT - - - - - - 20 mA 4bar - -
RS Stock No. 869-7643
Mfr. Part No.ILLS-G0100-5-003
BrandCynergy3
kr 2 593,67
Each
Units
Pressure Cable 4-20mA Stainless Steel 3m - -20°C +60°C - 32V 28 mA 20bar - -
RS Stock No. 387-0341
Mfr. Part No.CAP98XPXD
BrandVega
kr 4 030,68
Each
Units
Capacitance Horizontal, Vertical Relay Polypropylene - - -30°C +80°C - - 1 A dc, 3 A ac - - -
RS Stock No. 204-6733
Mfr. Part No.003H2
BrandMobrey
kr 2 381,02
Each
Units
Gap Sensor Level Alarm Switch Horizontal, Vertical FET Polyphenylene Sulfide 3m - -40°C +105°C - - 100 mA 5bar - -
RS Stock No. 740-6442
Mfr. Part No.LMT100
kr 1 279,15
Each
Units
Electronic Flush Mount PNP NO/NC FPM, PA12, PEEK, Stainless Steel - - 0°C +60°C - - 50 mA 16bar PEEK -
RS Stock No. 185-9869
Mfr. Part No.S01DB/F68/4
BrandMobrey
kr 5 132,15
Each
Units
Liquid Level Switch Side Mount SPST Aluminium Bronze - - - +210°C - - 2 A dc, 3 A ac 18bar Non Asbestos Sheet -
RS Stock No. 906-9594
Mfr. Part No.F6-SS
kr 446,47
Each
Units
Level Switch Vertical SPST Stainless Steel 11.8in - -20°C +125°C 240V - - 15bar - 170 mA
RS Stock No. 204-6749
Mfr. Part No.003S2
BrandMobrey
kr 2 280,93
Each
Units
Gap Sensor Level Alarm Switch Horizontal, Vertical Relay Polyphenylene Sulfide 3m - -20°C +70°C - - 1 A 5bar - -
RS Stock No. 377-9872
Mfr. Part No.VN2
kr 429,58
Each
Units
Conductive Cable - Nylon 6 2m - 0°C +90°C - - - 10bar - -
RS Stock No. 768-2081
Mfr. Part No.PSWL61.XXBXXHKAX
BrandVega
kr 12 507,87
Each
Units
Radar Cable - - 6m - -20°C +60°C - - 131 mA - - -
RS Stock No. 780-0175
Mfr. Part No.SSF22X100-18N
BrandCynergy3
kr 633,86
Each
Units
Level Switch Vertical - Stainless Steel 1m - -20°C +120°C - - 500 mA 10bar - -
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