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. 519-236
BrandRS PRO
R 88.89
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 140V 200V 700 mA - - -
RS stock no. 339-730
Mfr. Part No.RSF43Y050QF
BrandCynergy3
R 189.70
Each
units
Float - Horizontal Internal NO/NC Nylon 500 -20°C +75°C - - 600 mA - Nitrile -
RS stock no. 519-232
BrandRS PRO
R 100.26
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS stock no. 869-7595
Mfr. Part No.RSF83YP
BrandCynergy3
R 230.13
Each
units
Float - Horizontal NO/NC Nylon - -20°C +75°C 240V 120V 600 mA - - -
RS stock no. 205-6910
Mfr. Part No.MS10A
BrandCynergy3
R 571.44
Each
units
Float - - NO PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS stock no. 845-976
Mfr. Part No.RSF44Y050QF
BrandCynergy3
R 247.55
Each
units
Float - Horizontal Internal NO/NC Polypropylene 500 -20°C +100°C - - 600 mA - Nitrile -
RS stock no. 519-258
BrandRS PRO
R 102.58
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS stock no. 519-242
BrandRS PRO
R 67.94
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 140V 200V 1 A - - -
RS stock no. 906-9522
Mfr. Part No.CFS2-DNBPN-20
R 514.65
Each
units
Float Switch - Cable SPDT Polypropylene 240.2in 0°C +50°C 250V - - 1bar - 10 A
RS stock no. 338-9750
Mfr. Part No.RSF76Y100RV
BrandCynergy3
R 320.22
Each
units
Float - Horizontal External NO/NC Polyphenylene Sulfide 1m -10°C +105°C - - 600 mA - Viton -
RS stock no. 845-960
Mfr. Part No.RSF54Y100JC
BrandCynergy3
R 263.96
Each
units
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS stock no. 228-1992
Mfr. Part No.RSF34W100RF
BrandCynergy3
R 414.92
Each
units
Float - Horizontal NO/NC Polypropylene 1m -20°C +100°C - - 5 A - Nitrile -
RS stock no. 869-7598
Mfr. Part No.RSF84YP
BrandCynergy3
R 244.88
Each
units
Float - Horizontal NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - - -
RS stock no. 339-5200
Mfr. Part No.LFL1-CK-N-PVC5
R 1,131.71
Each
units
Float - Horizontal Direct Load Polypropylene 5m -20°C +70°C - - 2.2 mA 3bar - -
RS stock no. 317-932
Mfr. Part No.RSF73Y050QM
BrandCynergy3
R 246.08
Each
units
Float - Horizontal External Direct Load Nylon 500mm -20°C +75°C - - 600 mA - Silicone -
RS stock no. 756-4160
Mfr. Part No.SSV66A150E1GP
BrandCynergy3
R 1,685.37
Each
units
Float - Vertical NO/NC Stainless Steel - - - - - 500 mA 20 - -
RS stock no. 348-8021
Mfr. Part No.RSF66A25B175
BrandCynergy3
R 704.11
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS stock no. 348-7983
Mfr. Part No.RSF66A25B75
BrandCynergy3
R 659.39
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS stock no. 869-7609
Mfr. Part No.MS20C
BrandCynergy3
R 551.90
Each
units
Float - Cable NO/NC Polypropylene 5m 0°C +55°C 250V 110V 20 A 10bar - -
RS stock no. 492-8924
Mfr. Part No.SSF67A25B125
BrandCynergy3
R 3,075.68
Each
units
Float - Vertical Direct Load Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -