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. 845-976
Mfr. Part No.RSF44Y050QF
BrandCynergy3
SGD26.22
Each
units
Float - Horizontal Internal NO/NC Polypropylene 500mm -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 331-017
Mfr. Part No.RSF53Y100JC
BrandCynergy3
SGD26.52
Each
units
Float - Vertical NO/NC Nylon 1m -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 906-9522
Mfr. Part No.CFS2-DNBPN-20
SGD43.77
Each
units
Float Switch - Cable SPDT Polypropylene 240.2in 0°C +50°C 250V - - 1bar - 10 A
RS Stock No. 205-6910
Mfr. Part No.MS10A
BrandCynergy3
SGD53.83
Each
units
Float - - NO PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS Stock No. 446-2597
Mfr. Part No.RSF66B50B150
BrandCynergy3
SGD81.88
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 859-3333
Mfr. Part No.FSH-21
SGD63.75
Each
units
Float Switch - Horizontal SPST Polypropylene - -20°C +80°C - - 0.5 (Switching) A, 1 (Carrying) A 57psi - -
RS Stock No. 211-985
Mfr. Part No.RSF64EXS
BrandCynergy3
SGD87.99
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1.5m 0°C +75°C - - 600 mA - - -
RS Stock No. 317-932
Mfr. Part No.RSF73Y050QM
BrandCynergy3
SGD26.75
Each
units
Float - Horizontal External Direct Load Nylon 500mm -20°C +75°C - - 600 mA - Silicone -
RS Stock No. 338-9788
Mfr. Part No.RSF56Y100RB
BrandCynergy3
SGD32.78
Each
units
Float - Vertical NO/NC Polyphenylene Sulfide 1m -10°C +100°C - - 600 mA - Silicone, Viton -
RS Stock No. 339-5244
Mfr. Part No.LFL2-BK-U-PVC5
SGD109.00
Each
units
Float - Horizontal Direct Load Polypropylene 5m -20°C +70°C - - 1 A dc, 3 A ac 2bar - -
RS Stock No. 869-7609
Mfr. Part No.MS20C
BrandCynergy3
SGD58.68
Each
units
Float - Cable NO/NC Polypropylene 5m 0°C +55°C 250V 110V 20 A 10bar - -
RS Stock No. 339-5238
Mfr. Part No.LFL2-CK-U-PVC5
SGD97.00
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
SGD30.03
Each
units
Float - Horizontal NO/NC Polyphenylene Sulfide 1m -10°C +120°C - - 600 mA - Viton -
RS Stock No. 756-4201
Mfr. Part No.SSF67B50B100
BrandCynergy3
SGD345.71
Each
units
Float - Vertical NO/NC Stainless Steel 1m -20°C +135°C - - 600 mA 10bar Nitrile -
RS Stock No. 431-8406
Mfr. Part No.SSF212X100
BrandCynergy3
SGD147.57
Each
units
Float - Horizontal NO/NC Stainless Steel 1m - +120°C - - 500 mA 5bar - -
RS Stock No. 889-1267
Mfr. Part No.LV20-1201
BrandFlowline
SGD52.24
Each
units
Float Level Switch - Vertical NO/NC Polypropylene 600mm -40°C +80°C 120V 120V 10 A 10psi - -
RS Stock No. 431-8399
Mfr. Part No.SSF211X100
BrandCynergy3
SGD144.68
Each
units
Float - Horizontal NO/NC Stainless Steel 1m - +120°C - - 500 mA 5bar - -
RS Stock No. 339-5200
Mfr. Part No.LFL1-CK-N-PVC5
SGD118.19
Each
units
Float - Horizontal NAMUR Polypropylene 5m -20°C +70°C - - 2.2 mA 3bar - -
RS Stock No. 395-7094
Mfr. Part No.010-0391
SGD227.44
Each
units
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS Stock No. 348-7983
Mfr. Part No.RSF66A25B75
BrandCynergy3
SGD71.81
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
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