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. 191-9503
BrandRS PRO
MYR85.51
Each
units
Float - Horizontal NO/NC Polyphenylene Sulphide - -10°C +120°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. 191-9484
BrandRS PRO
MYR85.58
Each
units
Float - External NO/NC Polypropylene 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 762-1039
BrandRS PRO
MYR223.15
Each
units
Float - Horizontal NO Stainless Steel 300mm -40°C +125°C 250V 200V 500 mA 10bar Silicone -
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. 191-9502
BrandRS PRO
MYR90.72
Each
units
Float - Vertical NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 174-8426
BrandRS PRO
MYR65.96
Each
units
Float - Horizontal External SPNO Nylon - -20°C +75°C 240V 120V 600 mA - - 0.6 A
RS Stock No. 191-9489
BrandRS PRO
MYR158.69
Each
units
Float - Vertical NO/NC Buna (Float), Nylon (Stem) 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9473
BrandRS PRO
MYR95.52
Each
units
Float - Horizontal NO/NC Polyphenylene Sulphide 1m -10°C +120°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. 191-9515
BrandRS PRO
MYR865.40
Each
units
Float - Internal NO/NC Stainless Steel 1m - +135°C 250V 120V 600 mA 10bar - 600 mA
RS Stock No. 174-8425
BrandRS PRO
MYR79.70
Each
units
Float - Horizontal External SPNO Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile 0.6 A
RS Stock No. 191-9508
BrandRS PRO
MYR226.52
Each
units
Float - Internal - Polyphenylene Sulphide 1m -10°C +85°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9509
BrandRS PRO
MYR73.24
Each
units
Float - Horizontal NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - - 600 mA
RS Stock No. 191-9480
BrandRS PRO
MYR76.64
Each
units
Float - Threaded NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9488
BrandRS PRO
MYR91.38
Each
units
Float - External NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9507
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. 339-730
Mfr. Part No.RSF43Y050QF
BrandCynergy3
MYR68.15
Each
units
Float - Horizontal Internal NO/NC Nylon 500mm -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 338-9716
Mfr. Part No.RSF46Y100RG
BrandCynergy3
MYR98.52
Each
units
Float - Horizontal Internal NO/NC Polyphenylene Sulfide 1m -10°C +120°C - - 600 mA - Silicone, Viton -
RS Stock No. 339-5238
Mfr. Part No.LFL2-CK-U-PVC5
MYR342.27
Each
units
Float - Horizontal Direct Load Polypropylene 5m +5°C +70°C - - 1 A dc, 3 A ac 3bar - -
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