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
New
RS Stock No. 191-9500
BrandRS PRO
SGD27.12
Each
units
Float Vertical NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9493
BrandRS PRO
SGD51.73
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Float External NC HDPE 5m 0°C +45°C 250V 24V 10 A 10bar - 10 A -
New
RS Stock No. 191-9474
BrandRS PRO
SGD30.35
Each
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Float Horizontal NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9503
BrandRS PRO
SGD28.97
Each
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Float Horizontal NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9514
BrandRS PRO
SGD293.21
Each
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Float Internal NO/NC Stainless Steel 1m - +135°C 250V 120V 600 mA 10bar - 600 mA -
New
RS Stock No. 191-9471
BrandRS PRO
SGD32.59
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Float Vertical NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9470
BrandRS PRO
SGD32.59
Each
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Float Vertical NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - - 600 mA -
New
RS Stock No. 191-9476
BrandRS PRO
SGD26.40
Each
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Float Threaded NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9506
BrandRS PRO
SGD66.94
Each
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Float Internal - Polyphenylene Sulphide - -10°C +85°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9484
BrandRS PRO
SGD29.00
Each
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Float External NO/NC Polypropylene 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9498
BrandRS PRO
SGD27.71
Each
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Float External, Vertical NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9516
BrandRS PRO
SGD310.32
Each
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Float Internal NO/NC Stainless Steel 1m - +135°C 250V 120V 600 mA 10bar - 600 mA -
New
RS Stock No. 191-9507
BrandRS PRO
SGD68.84
Each
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Float Internal - Polyphenylene Sulphide 1m -10°C +85°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9477
BrandRS PRO
SGD27.89
Each
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Float Threaded NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9469
BrandRS PRO
SGD30.87
Each
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Float Horizontal NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9495
BrandRS PRO
SGD27.91
Each
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Float External, Vertical NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA -
New
RS Stock No. 191-9515
BrandRS PRO
SGD293.21
Each
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Float Internal NO/NC Stainless Steel 1m - +135°C 250V 120V 600 mA 10bar - 600 mA -
New
RS Stock No. 191-9475
BrandRS PRO
SGD38.76
Each
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Float Internal NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - - 600 mA -
New
RS Stock No. 191-9510
BrandRS PRO
SGD29.58
Each
units
Float Horizontal NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - - 600 mA -
New
RS Stock No. 191-9513
BrandRS PRO
SGD293.21
Each
units
Float Internal NO/NC Stainless Steel 1m - +135°C 250V 120V 600 mA 10bar - 600 mA -
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