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
HK$146.68
Each
units
Float - Horizontal Internal NO/NC Nylon 500mm -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 845-960
Mfr. Part No.RSF54Y100JC
BrandCynergy3
HK$153.31
Each
units
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 446-2569
Mfr. Part No.RSF66A50A100
BrandCynergy3
HK$465.81
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 454-9105
Mfr. Part No.SSF212XPL
BrandCynergy3
HK$856.70
Each
units
Float - Horizontal NO/NC Stainless Steel - - +120°C - - 500 mA 5bar - -
RS Stock No. 869-7576
Mfr. Part No.RSF48YFP
BrandCynergy3
HK$124.82
Each
units
Float - Horizontal NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile -
RS Stock No. 756-4242
Mfr. Part No.RSF66A25B175P
BrandCynergy3
HK$361.24
Each
units
Float - Vertical NO/NC Polyphenylene Sulfide - -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 845-976
Mfr. Part No.RSF44Y050QF
BrandCynergy3
HK$143.63
Each
units
Float - Horizontal Internal NO/NC Polypropylene 500mm -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 446-2597
Mfr. Part No.RSF66B50B150
BrandCynergy3
HK$403.50
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
HK$289.69
Each
units
Float - - NC PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS Stock No. 205-6910
Mfr. Part No.MS10A
BrandCynergy3
HK$315.18
Each
units
Float - - NO PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS Stock No. 338-9788
Mfr. Part No.RSF56Y100RB
BrandCynergy3
HK$142.08
Each
units
Float - Vertical NO/NC Polyphenylene Sulfide 1m -10°C +100°C - - 600 mA - Silicone, Viton -
RS Stock No. 431-8406
Mfr. Part No.SSF212X100
BrandCynergy3
HK$593.44
Each
units
Float - Horizontal NO/NC Stainless Steel 1m - +120°C - - 500 mA 5bar - -
RS Stock No. 338-9801
Mfr. Part No.MS20A
BrandCynergy3
HK$354.42
Each
units
Float - - Direct Load PE 5m 0°C +55°C - - 2 A dc, 8 A ac 10bar - -
RS Stock No. 395-7145
Mfr. Part No.169555
HK$412.18
Each
units
Float - Horizontal, Vertical Direct Load Polysulfone - -17.8°C +80°C - - 40 mA 150psi - -
RS Stock No. 211-985
Mfr. Part No.RSF64EXS
BrandCynergy3
HK$489.53
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1.5m 0°C +75°C - - 600 mA - - -
RS Stock No. 331-017
Mfr. Part No.RSF53Y100JC
BrandCynergy3
HK$144.76
Each
units
Float - Vertical NO/NC Nylon 1m -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 338-9716
Mfr. Part No.RSF46Y100RG
BrandCynergy3
HK$165.06
Each
units
Float - Horizontal Internal NO/NC Polyphenylene Sulfide 1m -10°C +120°C - - 600 mA - Silicone, Viton -
RS Stock No. 288-9322
Mfr. Part No.RSF76Y050TV
BrandCynergy3
HK$189.01
Each
units
Float - Horizontal External NO/NC Polyphenylene Sulfide 500mm -10°C +120°C - - 600 mA - Silicone, Viton -
RS Stock No. 859-3333
Mfr. Part No.FSH-21
HK$301.08
Each
units
Float Switch - Horizontal SPST Polypropylene - -20°C +80°C - - 0.5 (Switching) A, 1 (Carrying) A 57psi - -
RS Stock No. 228-1986
Mfr. Part No.RSF33W100RC
BrandCynergy3
HK$153.10
Each
units
Float - Horizontal NO/NC Nylon 1m -20°C +75°C - - 5 A - Nitrile -