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 sensors 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. 889-1346
Mfr. Part No.DL10-11
BrandFlowline
£288.42
Each
Units
Ultrasonic Level Transmitter Vertical - Polycarbonate 1.2m -35°C +60°C - 24V 20 mA 30psi Viton - -
RS Stock No. 889-1393
Mfr. Part No.DX10-00-8FT
BrandFlowline
£282.01
Each
Units
Ultrasonic Level Sensor Vertical - Polycarbonate 1.2m -35°C +60°C - 24V 15 (Nominal) mA 30psi Viton - -
RS Stock No. 124-0142
Mfr. Part No.LO10-1305
BrandFlowline
£134.30
Each
Units
Flowline Detection Switch Vertical NO/NC PP 3m -40°C +80°C - 36V - 10bar FKM 25 mA -
RS Stock No. 124-0110
Mfr. Part No.DL10-01
BrandFlowline
£291.90
Each
Units
Ultrasonic Level Transmitter Vertical - ABS, PC 1.2m -35°C +60°C - 24V 20 mA 2bar FKM - -
RS Stock No. 124-0137
Mfr. Part No.LU10-1305
BrandFlowline
£272.56
Each
Units
Ultrasonic Level Switch Vertical - PP 3m -40°C +80°C - 36V - 10bar FKM 25 mA -
RS Stock No. 124-0123
Mfr. Part No.LU27-01
BrandFlowline
£322.20
Each
Units
Ultrasonic Level Transmitter Vertical - PC 3m -35°C +60°C - 24V 20 mA 2bar FKM - -
RS Stock No. 889-1365
Mfr. Part No.DL24-00
BrandFlowline
£426.84
Each
Units
Ultrasonic Level Transmitter Vertical 2 Wire Relay Polycarbonate 1.2m -35°C +60°C - 24V 20 mA 30psi Viton - -
RS Stock No. 124-0138
Mfr. Part No.LV10-1301
BrandFlowline
£114.75
Each
Units
Buoyancy Level Switch Vertical NO/NC PP 3m -40°C +90°C - - - 2bar - 250 mA -
RS Stock No. 889-1330
Mfr. Part No.DL10-00
BrandFlowline
£301.70
Each
Units
Ultrasonic Level Transmitter Vertical - Polycarbonate 1.2m -35°C +60°C - 24V 20 mA 30psi Viton - -
RS Stock No. 124-0131
Mfr. Part No.LU74-5004
BrandFlowline
£612.21
Each
Units
Ultrasonic Level Switch Vertical - PC - -40°C +71°C 250V - 20 mA 2bar FKM 2 A -
RS Stock No. 124-0111
Mfr. Part No.DL14-01
BrandFlowline
£328.86
Each
Units
Ultrasonic Level Transmitter Vertical - ABS, PC 1.2m -35°C +60°C - 24V 20 mA 2bar FKM 1 A -
RS Stock No. 889-1273
Mfr. Part No.LV41-7501
BrandFlowline
£82.70
Each
Units
Sump Float Level Switch Vertical - Polypropylene 15.2m 0°C +50°C 250V - 10 A 14.5psi - - -
RS Stock No. 124-0128
Mfr. Part No.LU83-5101
BrandFlowline
£648.44
Each
Units
Ultrasonic Level Transmitter Vertical - PC - -40°C +71°C - 28V 20 mA 2bar FKM - -
RS Stock No. 889-1352
Mfr. Part No.DL14-10
BrandFlowline
£352.52
Each
Units
Multi Function Ultrasonic Transmitter Vertical Relay Polycarbonate 1.2m -35°C +60°C - 24V 20 mA 30psi Viton - -
RS Stock No. 124-0141
Mfr. Part No.LZ12-1405
BrandFlowline
£281.09
Each
Units
Vibration Level Switch Vertical NO/NC PPS 3m -40°C +80°C - 30V - 10bar FKM 25 mA -
RS Stock No. 124-0112
Mfr. Part No.DL24-01
BrandFlowline
£398.80
Each
Units
Ultrasonic Level Transmitter Vertical - PC 1.2m -35°C +60°C - 24V 20 mA 2bar FKM 1 A -
RS Stock No. 889-1166
Mfr. Part No.LU10-1405
BrandFlowline
£254.30
Each
Units
Ultrasonic Level Switch Cable - Polypropylene 3m -40°C +80°C - 36V - 150psi Viton 500 mA -
RS Stock No. 889-1286
Mfr. Part No.LV42-7501
BrandFlowline
£171.56
Each
Units
Sump Float Level Switch Vertical - Polypropylene 15.2m -20°C +80°C 250V - 10 A 29psi - - -
RS Stock No. 889-1374
Mfr. Part No.DS14-00
BrandFlowline
£326.39
Each
Units
Controller, Ultrasonic Level Switch Vertical - Polycarbonate 1.2m -35°C +60°C 24V 24V - 30psi Viton 1 A -
RS Stock No. 889-1416
Mfr. Part No.GT10-1405
BrandFlowline
£185.95
Each
Units
- - - - - -40°C +60°C - - - - - 1 A -