Float Switches

Float switches regulate the liquid level in tanks, wells, etc. and are used for automatic level control of groundwater, wastewater and sewage pumps, for raw water and liquid transfer pumps at waterworks, and for high water alarm.


What does a float switch consist of?


Float switches have a reed switch and a pivoted magnet and can be used for normally open (N/O) or normally closed (N/C) operation. The switch action can be reversed rotating the switch through 180°. The movement of float, due to changing fluid level, will cause the reed change to work (for instance close or open) at a specific level. This trusted and tried technology depends on a generally straightforward plan that offers long-haul quality without the requirement for the user to calibrate a switch.


What are material types of a float switch?


  • Nylon – used for oils, diesel, organic chemicals

  • Polypropylene (PP) – acids and alkali, detergents, oils, water, organic chemicals

  • Polyphenylene sulphide (PPS) – used for more aggressive chemicals, and higher temperatures, up to 120ºC

  • Stainless steel – medical and food industries, hydraulic fluids, chemicals

Features and Benefits


  • The highly flexible thermoplastic rubber cable has an extremely high mechanical load rating

  • The drop shape of the stabilizing weight eccentrically mounted in the housing makes the float switch insensitive to turbulence

  • The microswitch, fitted in a dual-chamber system, is completely shock- and rupture-proof

Where can be float switches used?


  • when emptying a tank

  • when filling a tank

  • for alarm at high water level

  • for alarm at low water level

...
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Description Price Device Type For Use With 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
RS Stock No. 191-9485
BrandRS PRO
MYR87.18
Each
units
Float - External NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Silicone 600 mA
RS Stock No. 191-9498
BrandRS PRO
MYR81.78
Each
units
Float - External, Vertical NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9475
BrandRS PRO
MYR114.40
Each
units
Float - Internal NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - - 600 mA
RS Stock No. 174-8421
BrandRS PRO
MYR64.58
Each
units
Float - Horizontal External SPNO Nylon 1m -20°C +75°C 240V 120V 600 mA - - 0.6 A
RS Stock No. 174-8412
BrandRS PRO
MYR73.72
Each
units
Float - Horizontal Internal SPNO Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Nitrile 0.6 A
RS Stock No. 191-9481
BrandRS PRO
MYR87.65
Each
units
Float - Threaded NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9504
BrandRS PRO
MYR203.18
Each
units
Float - Internal - Polyphenylene Sulphide 1m -10°C +85°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 174-8427
BrandRS PRO
MYR70.22
Each
units
Float - Horizontal External SPNO Polypropylene - -20°C +100°C 240V 120V 600 mA - - 0.6 A
RS Stock No. 174-8419
BrandRS PRO
MYR76.33
Each
units
Float - Horizontal External SPNO Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 0.6 A
RS Stock No. 174-8414
BrandRS PRO
MYR75.57
Each
units
Float - Vertical Internal NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - - 0.6 A
RS Stock No. 174-8424
BrandRS PRO
MYR76.95
Each
units
Float - Horizontal External SPNO Nylon - -20°C +75°C 240V 120V 600 mA - Nitrile 0.6 A
RS Stock No. 191-9476
BrandRS PRO
MYR77.91
Each
units
Float - Threaded NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9512
BrandRS PRO
MYR560.64
Each
units
Float - External, Horizontal NO/NC 304 Stainless Steel (Stem), 316 Stainless Steel (Float) - - +120°C 300V 300V 500 mA 5bar - 500 mA
RS Stock No. 191-9467
BrandRS PRO
MYR98.05
Each
units
Float - External, Vertical NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9493
BrandRS PRO
MYR152.68
Each
units
Float - External NC HDPE 5m 0°C +45°C 250V 24V 10 A 10bar - 10 A
RS Stock No. 191-9496
BrandRS PRO
MYR77.04
Each
units
Float - External, Vertical NO/NC Nylon - -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9482
BrandRS PRO
MYR81.24
Each
units
Float - External NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 312-7164
BrandRS PRO
MYR380.76
Each
units
Float - Vertical Direct Load Stainless Steel 300mm -10°C +120°C 300V 300V 500 mA 10bar - -
RS Stock No. 191-9492
BrandRS PRO
MYR152.68
Each
units
Float - External NO HDPE 5m 0°C +45°C 250V 24V 10 A 10bar - 10 A
RS Stock No. 191-9503
BrandRS PRO
MYR85.51
Each
units
Float - Horizontal NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
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