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
New
RS Stock No. 191-9516
BrandRS PRO
£137.31
Each
Units
Float Internal NO/NC Stainless Steel 1m - +135°C 250V 120V 600 mA 10bar - 600 mA -
New
RS Stock No. 191-9499
BrandRS PRO
£11.26
Each
Units
Float Vertical NO/NC Nylon - -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9490
BrandRS PRO
£88.36
Each
Units
Float External NO High Density Polyethylene 5m 0°C +55°C 250V 110V 10 A 10bar - 10 A -
New
RS Stock No. 191-9508
BrandRS PRO
£33.96
Each
Units
Float Internal - Polyphenylene Sulphide 1m -10°C +85°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9475
BrandRS PRO
£17.15
Each
Units
Float Internal NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - - 600 mA -
New
RS Stock No. 191-9483
BrandRS PRO
£12.38
Each
Units
Float External NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Silicone 600 mA -
New
RS Stock No. 191-9485
BrandRS PRO
£13.07
Each
Units
Float External NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Silicone 600 mA -
New
RS Stock No. 191-9513
BrandRS PRO
£129.74
Each
Units
Float Internal NO/NC Stainless Steel 1m - +135°C 250V 120V 600 mA 10bar - 600 mA -
New
RS Stock No. 191-9487
BrandRS PRO
£11.95
Each
Units
Float External NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9471
BrandRS PRO
£14.42
Each
Units
Float Vertical NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9480
BrandRS PRO
£11.49
Each
Units
Float Threaded NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9495
BrandRS PRO
£12.35
Each
Units
Float External, Vertical NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9467
BrandRS PRO
£14.70
Each
Units
Float External, Vertical NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9515
BrandRS PRO
£129.74
Each
Units
Float Internal NO/NC Stainless Steel 1m - +135°C 250V 120V 600 mA 10bar - 600 mA -
New
RS Stock No. 191-9498
BrandRS PRO
£12.26
Each
Units
Float External, Vertical NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9489
BrandRS PRO
£23.79
Each
Units
Float Vertical NO/NC Buna (Float), Nylon (Stem) 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9507
BrandRS PRO
£30.46
Each
Units
Float Internal - Polyphenylene Sulphide 1m -10°C +85°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9474
BrandRS PRO
£13.43
Each
Units
Float Horizontal NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9482
BrandRS PRO
£12.18
Each
Units
Float External NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9512
BrandRS PRO
£84.05
Each
Units
Float External, Horizontal NO/NC 304 Stainless Steel (Stem), 316 Stainless Steel (Float) - - +120°C 300V 300V 500 mA 5bar - 500 mA -
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