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. 780-0242
Mfr. Part No.SSF67A50A200PM12
BrandCynergy3
TWD7,483.00
Each
units
Float - Vertical 2NO Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -
RS Stock No. 124-2590
Mfr. Part No.RSF107H100GN/RS
BrandCynergy3
TWD1,487.00
Each
units
Float - Vertical NO/NC Polyvinylidene Fluoride 1m -10°C +105°C 300V 300V 1 A - Nitrile -
RS Stock No. 191-9484
BrandRS PRO
TWD577.00
Each
units
Float - External NO/NC Polypropylene 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 756-4208
Mfr. Part No.SSF67A50A250
BrandCynergy3
TWD7,843.00
Each
units
Float - Vertical NO/NC Stainless Steel 1m -20°C +135°C - - 600 mA 10bar Nitrile -
RS Stock No. 122-8397
Mfr. Part No.191080
TWD868.00
Each
units
Float - Horizontal SPST NC Noryl 26in -40°C +107.2°C - - - 6.8bar Buna N -
RS Stock No. 191-9513
BrandRS PRO
TWD5,834.00
Each
units
Float - Internal NO/NC Stainless Steel 1m - +135°C 250V 120V 600 mA 10bar - 600 mA
RS Stock No. 780-0232
Mfr. Part No.SSF67A25B250PM12
BrandCynergy3
TWD6,977.00
Each
units
Float - Vertical NO/NC Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -
RS Stock No. 174-8364
Mfr. Part No.LLF47H100GF
BrandCynergy3
TWD1,953.00
Each
units
Float - Horizontal Internal SPNO Polyvinylidene Fluoride 1m -10°C +105°C 300V 300V 1 A - Nitrile 1 A
RS Stock No. 122-8409
Mfr. Part No.LS-240-3E NO
TWD9,520.00
Each
units
Float - Cable SPST NO Stainless Steel 2m -40°C +80°C - - - 10bar - -
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
RS Stock No. 228-1986
Mfr. Part No.RSF33W100RC
BrandCynergy3
TWD800.00
Each
units
Float - Horizontal NO/NC Nylon 1m -20°C +75°C - - 5 A - Nitrile -
RS Stock No. 379-4045
Mfr. Part No.FFSMC10BW
BrandCynergy3
TWD5,384.00
Each
units
Float - - Direct Load PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS Stock No. 338-9817
Mfr. Part No.FFS10AU
BrandCynergy3
TWD3,111.00
Each
units
Float - - Direct Load PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS Stock No. 191-9482
BrandRS PRO
TWD548.00
Each
units
Float - External NO/NC Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9511
BrandRS PRO
TWD607.00
Each
units
Float - Horizontal NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - - 600 mA
RS Stock No. 756-4309
Mfr. Part No.LITTLE-EX-20M
BrandCynergy3
TWD9,582.00
Each
units
Float - Horizontal, Vertical NO/NC PE 20m 0°C +55°C - - 21.4 mA 10bar - -
RS Stock No. 725-9912
Mfr. Part No.SSV66A813E34N183
BrandCynergy3
TWD4,607.00
Each
units
Float - Vertical NO/NC Stainless Steel 1m 0°C +120°C - - 2.5 A 10bar - -
RS Stock No. 174-8385
Mfr. Part No.LLF74H100RN
BrandCynergy3
TWD782.00
Each
units
Float - Horizontal External SPNO Polypropylene 1m -20°C +100°C 300V 300V 1 A - Nitrile 1 A
RS Stock No. 124-0140
Mfr. Part No.LV42-7201
BrandFlowline
TWD7,676.00
Each
units
Float Level Switch - Vertical SPDT PP 20ft -20°C +80°C 250V - - 2bar - 10 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