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. 174-8379
Mfr. Part No.LLF47HGP
BrandCynergy3
TWD2,144.00
Each
units
Float - Horizontal Internal SPNO Polyvinylidene Fluoride - -10°C +105°C 300V 300V 1 A - Viton 1 A
RS Stock No. 756-4176
Mfr. Part No.SSF67A25B200
BrandCynergy3
TWD7,228.00
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
TWD3,211.00
Each
units
Float - Horizontal NO/NC Stainless Steel 1m - +120°C - - 500 mA 5bar - -
RS Stock No. 174-8394
Mfr. Part No.LLF77Y100GV
BrandCynergy3
TWD1,702.00
Each
units
Float - Horizontal External SPNO Polyvinylidene Fluoride 1m -10°C +105°C 240V 120V 600 mA - Viton 0.6 A
RS Stock No. 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. 122-8414
Mfr. Part No.144080
TWD6,460.00
Each
units
Float - Vertical SPST NC Aluminium 24in -40°C +148.9°C - - - 600psi - -
RS Stock No. 174-8384
Mfr. Part No.LLF73Y100RM
BrandCynergy3
TWD792.00
Each
units
Float - Horizontal External SPNO Nylon 1m -20°C +75°C 240V 120V 600 mA - Silicone 0.6 A
RS Stock No. 124-2569
Mfr. Part No.RSF47HGP/RS
BrandCynergy3
TWD1,739.00
Each
units
Float - Horizontal NO/NC Polyvinylidene Fluoride - -10°C +105°C 300V 300V 1 A - Viton -
RS Stock No. 174-8358
Mfr. Part No.LLF43Y100RF
BrandCynergy3
TWD664.00
Each
units
Float - Horizontal Internal SPNO Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 0.6 A
RS Stock No. 177-9140
Mfr. Part No.9037HG37
TWD4,118.00
Each
units
Float Switch - Screw In 2 NC DPST Polypropylene - -30°C +105°C 230 (Single Phase) V, 475 (3 Phase) V 230V - - - -
RS Stock No. 725-9861
Mfr. Part No.RSF83H100R
BrandCynergy3
TWD592.00
Each
units
Float - Horizontal External NO/NC Nylon 1m -20°C +75°C - - 600 mA - - -
RS Stock No. 845-998
Mfr. Part No.RSF54V100MC
BrandCynergy3
TWD671.00
Each
units
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS Stock No. 191-9476
BrandRS PRO
TWD525.00
Each
units
Float - Threaded NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9483
BrandRS PRO
TWD557.00
Each
units
Float - External NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Silicone 600 mA
RS Stock No. 174-8361
Mfr. Part No.LLF46H100RF
BrandCynergy3
TWD1,067.00
Each
units
Float - Horizontal Internal SPNO Polyphenylene Sulphide 1m -10°C +120°C 300V 300V 1 A - Nitrile 1 A
RS Stock No. 191-9490
BrandRS PRO
TWD3,974.00
Each
units
Float - External NO High Density Polyethylene 5m 0°C +55°C 250V 110V 10 A 10bar - 10 A
RS Stock No. 348-8021
Mfr. Part No.RSF66A25B175
BrandCynergy3
TWD1,662.00
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 845-982
Mfr. Part No.RSF53V100MC
BrandCynergy3
TWD581.00
Each
units
Float - Vertical NO/NC Nylon 1m -20°C +75°C - - 600 mA - Nitrile -
RS Stock No. 191-9481
BrandRS PRO
TWD591.00
Each
units
Float - Threaded NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
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