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. 191-9492
BrandRS PRO
TWD1,029.00
Each
units
Float - External NO HDPE 5m 0°C +45°C 250V 24V 10 A 10bar - 10 A
RS Stock No. 492-8930
Mfr. Part No.SSF67A25B150
BrandCynergy3
TWD7,441.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 174-8394
Mfr. Part No.LLF77Y100GV
BrandCynergy3
TWD1,772.00
Each
units
Float - Horizontal External SPNO Polyvinylidene Fluoride 1m -10°C +105°C 240V 120V 600 mA - Viton 0.6 A
RS Stock No. 174-8404
Mfr. Part No.LLF76YNP
BrandCynergy3
TWD779.00
Each
units
Float - Horizontal External SPNO Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 0.6 A
RS Stock No. 492-8946
Mfr. Part No.SSF67A25B175
BrandCynergy3
TWD5,681.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 174-8395
Mfr. Part No.LLF77H100GV
BrandCynergy3
TWD2,279.00
Each
units
Float - Horizontal External SPNO Polyvinylidene Fluoride 1m -10°C +105°C 300V 300V 1 A - Viton 1 A
RS Stock No. 780-0295
Mfr. Part No.FSHPLC
BrandCynergy3
TWD3,852.00
Each
units
Float - Vertical NO Stainless Steel - -20°C +100°C - - 1 mA 10bar Nitrile -
RS Stock No. 122-8393
Mfr. Part No.140620
TWD2,399.00
Each
units
Float - Horizontal SPST NO/NC Nylon 24in -40°C +121.1°C - - - 6.8bar - -
RS Stock No. 174-8405
Mfr. Part No.LLF77HNP
BrandCynergy3
TWD2,325.00
Each
units
Float - Horizontal External SPNO Polyvinylidene Fluoride - -10°C +105°C 300V 300V 1 A - Nitrile 1 A
RS Stock No. 174-8368
Mfr. Part No.LLF48Y100RF
BrandCynergy3
TWD702.00
Each
units
Float - Horizontal Internal SPNO Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Nitrile 0.6 A
RS Stock No. 395-7139
Mfr. Part No.169556
TWD1,979.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 725-9886
Mfr. Part No.RSF54H100R1/8
BrandCynergy3
TWD734.00
Each
units
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 1 A - Nitrile -
RS Stock No. 122-8387
Mfr. Part No.142545
TWD1,588.00
Each
units
Float - Vertical SPST NO/NC Polypropylene 22in -40°C +65.6°C - - - 150psi - -
RS Stock No. 780-0172
Mfr. Part No.SH-7052RH
BrandCynergy3
TWD13,360.00
Each
units
Float - Horizontal - Aluminium - 0°C +200°C - - 1 A 20bar Nitrile -
RS Stock No. 191-9469
BrandRS PRO
TWD614.00
Each
units
Float - Horizontal NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 397-0570
Mfr. Part No.RSF86Y100R
BrandCynergy3
TWD693.00
Each
units
Float - Horizontal NO/NC Polyphenylene Sulfide 1m -10°C +120°C - - 600 mA - Viton -
RS Stock No. 122-8394
Mfr. Part No.177100
TWD841.00
Each
units
Float - Horizontal SPST NO/NC Versaplast 24in -40°C +148.9°C - - - 6.8bar - -
RS Stock No. 191-9493
BrandRS PRO
TWD1,029.00
Each
units
Float - External NC HDPE 5m 0°C +45°C 250V 24V 10 A 10bar - 10 A
RS Stock No. 756-4182
Mfr. Part No.SSF67A25B300
BrandCynergy3
TWD7,362.00
Each
units
Float - Vertical NO/NC Stainless Steel 1m -20°C +135°C - - 600 mA 10bar Nitrile -
New
RS Stock No. 191-9504
BrandRS PRO
TWD1,369.00
Each
units
Float - Internal - Polyphenylene Sulphide 1m -10°C +85°C 240V 120V 600 mA - Nitrile 600 mA