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. 205-6910
Mfr. Part No.MS10A
BrandCynergy3
£26.15
Each
Units
Float - - NO PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS Stock No. 339-730
Mfr. Part No.RSF43Y050QF
BrandCynergy3
£9.73
Each
Units
Float - Horizontal Internal NO/NC Nylon 500 -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 446-2597
Mfr. Part No.RSF66B50B150
BrandCynergy3
£37.87
Each
Units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 338-9716
Mfr. Part No.RSF46Y100RG
BrandCynergy3
£14.48
Each
Units
Float - Horizontal Internal NO/NC Polyphenylene Sulfide 1 -10°C +120°C - - 600 mA - Silicone, Viton -
RS Stock No. 845-998
Mfr. Part No.RSF54V100MC
BrandCynergy3
£14.65
Each
Units
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 454-9105
Mfr. Part No.SSF212XPL
BrandCynergy3
£98.60
Each
Units
Float - Horizontal NO/NC Stainless Steel - - +120°C - - 500 mA 5bar - -
RS Stock No. 348-8021
Mfr. Part No.RSF66A25B175
BrandCynergy3
£36.23
Each
Units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 338-9794
Mfr. Part No.MS10B
BrandCynergy3
£25.98
Each
Units
Float - - NC PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS Stock No. 845-960
Mfr. Part No.RSF54Y100JC
BrandCynergy3
£13.71
Each
Units
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 338-9744
Mfr. Part No.RSF74Y100RN
BrandCynergy3
£14.06
Each
Units
Float - Horizontal External NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 312-7164
BrandRS PRO
£55.42
Each
Units
Float - Vertical Direct Load Stainless Steel 300mm -10°C +120°C 300V 300V 500 mA 10bar - -
RS Stock No. 331-017
Mfr. Part No.RSF53Y100JC
BrandCynergy3
£12.94
Each
Units
Float - Vertical NO/NC Nylon 1m -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 869-7609
Mfr. Part No.MS20C
BrandCynergy3
£28.81
Each
Units
Float - Cable NO/NC Polypropylene 5m 0°C +55°C 250V 110V 20 A 10bar - -
RS Stock No. 431-8406
Mfr. Part No.SSF212X100
BrandCynergy3
£68.43
Each
Units
Float - Horizontal NO/NC Stainless Steel 1m - +120°C - - 500 mA 5bar - -
RS Stock No. 350-2076
Mfr. Part No.LFL2-CK-U-CSM5
£54.79
Each
Units
Float - Horizontal Direct Load Polypropylene 5m -20°C +90°C - - 1 A dc, 3 A ac 3bar - -
RS Stock No. 348-7983
Mfr. Part No.RSF66A25B75
BrandCynergy3
£33.93
Each
Units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 725-9833
Mfr. Part No.RSF43H100RF
BrandCynergy3
£15.44
Each
Units
Float - Horizontal Internal NO/NC Nylon 1m -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 339-5238
Mfr. Part No.LFL2-CK-U-PVC5
£54.79
Each
Units
Float - Horizontal Direct Load Polypropylene 5m +5°C +70°C - - 1 A dc, 3 A ac 3bar - -
RS Stock No. 211-985
Mfr. Part No.RSF64EXS
BrandCynergy3
£43.05
Each
Units
Float - Vertical Direct Load Polyphenylene Sulfide 1.5m 0°C +75°C - - 600 mA - - -
RS Stock No. 845-976
Mfr. Part No.RSF44Y050QF
BrandCynergy3
£12.87
Each
Units
Float - Horizontal Internal NO/NC Polypropylene 500 -20°C +100°C - - 600 mA - Nitrile -