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. 339-730
Mfr. Part No.RSF43Y050QF
BrandCynergy3
MYR66.86
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
MYR99.55
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
MYR342.40
Each
units
Float - Horizontal Direct Load Polypropylene 5m +5°C +70°C - - 1 A dc, 3 A ac 3bar - -
RS Stock No. 397-0570
Mfr. Part No.RSF86Y100R
BrandCynergy3
MYR91.97
Each
units
Float - Horizontal NO/NC Polyphenylene Sulfide 1m -10°C +120°C - - 600 mA - Viton -
RS Stock No. 845-960
Mfr. Part No.RSF54Y100JC
BrandCynergy3
MYR96.45
Each
units
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 756-4144
Mfr. Part No.SSF217XPM12
BrandCynergy3
MYR684.77
Each
units
Float - Horizontal NO/NC Stainless Steel - - +120°C - - 500 mA 5bar - -
RS Stock No. 869-7520
Mfr. Part No.RSF103Y100JN
BrandCynergy3
MYR101.99
Each
units
Float - Vertical NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile -
RS Stock No. 519-232
BrandRS PRO
MYR34.64
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS Stock No. 331-017
Mfr. Part No.RSF53Y100JC
BrandCynergy3
MYR90.94
Each
units
Float - Vertical NO/NC Nylon 1m -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 845-976
Mfr. Part No.RSF44Y050QF
BrandCynergy3
MYR88.50
Each
units
Float - Horizontal Internal NO/NC Polypropylene 500mm -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 845-998
Mfr. Part No.RSF54V100MC
BrandCynergy3
MYR100.70
Each
units
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 338-9750
Mfr. Part No.RSF76Y100RV
BrandCynergy3
MYR109.47
Each
units
Float - Horizontal External NO/NC Polyphenylene Sulfide 1m -10°C +105°C - - 600 mA - Viton -
RS Stock No. 519-236
BrandRS PRO
MYR30.82
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 140V 200V 700 mA - - -
RS Stock No. 289-1319
Mfr. Part No.RSF46Y050TG
BrandCynergy3
MYR110.99
Each
units
Float - Horizontal Internal NO/NC Polyphenylene Sulfide 500mm -10°C +120°C - - 600 mA - Viton -
RS Stock No. 338-9700
Mfr. Part No.RSF43Y100RF
BrandCynergy3
MYR91.55
Each
units
Float - Horizontal Internal NO/NC Nylon 1m -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 869-7536
Mfr. Part No.RSF106Y100JV
BrandCynergy3
MYR122.60
Each
units
Float - Vertical NO/NC Polyphenylene Sulfide 1m -10°C +120°C 240V 120V 600 mA - Viton -
RS Stock No. 859-3333
Mfr. Part No.FSH-21
MYR219.19
Each
units
Float Switch - Horizontal SPST Polypropylene - -20°C +80°C - - 0.5 (Switching) A, 1 (Carrying) A 57psi - -
RS Stock No. 519-248
BrandRS PRO
MYR32.43
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 130V 180V 700 mA - - -
RS Stock No. 869-7602
Mfr. Part No.RSF88YP
BrandCynergy3
MYR71.80
Each
units
Float - Horizontal NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - - -
RS Stock No. 122-8386
Mfr. Part No.173250
MYR272.25
Each
units
Float - Vertical SPST NO PVDF 24in -40°C +121°C - - - 3bar - -