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. 122-8397
Mfr. Part No.191080
MYR131.43
Each
units
Float - Horizontal SPST NC Noryl 26in -40°C +107.2°C - - - 6.8bar Buna N -
RS Stock No. 174-8375
Mfr. Part No.LLF46YFP
BrandCynergy3
MYR113.19
Each
units
Float - Horizontal Internal SPNO Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 0.6 A
RS Stock No. 288-9322
Mfr. Part No.RSF76Y050TV
BrandCynergy3
MYR111.78
Each
units
Float - Horizontal External NO/NC Polyphenylene Sulfide 500mm -10°C +120°C - - 600 mA - Silicone, Viton -
RS Stock No. 122-8421
Mfr. Part No.117712
MYR506.42
Each
units
Float - Horizontal SPST NO Stainless Steel 316 24in -40°C +149°C 240V - 60 mA dc, 80 mA ac 100psi - -
RS Stock No. 869-7609
Mfr. Part No.MS20C
BrandCynergy3
MYR180.40
Each
units
Float - Cable NO/NC Polypropylene 5m 0°C +55°C 250V 110V 20 A 10bar - -
RS Stock No. 780-0260
Mfr. Part No.SSF67B50B250PM12
BrandCynergy3
MYR920.81
Each
units
Float - Vertical 2NC Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -
RS Stock No. 177-9127
Mfr. Part No.9036DG2
MYR218.36
Each
units
Float Switch - Pedestal Mount - Polypropylene - -30°C +105°C 230 (Single Phase) V, 475 (3 Phase) V 230V - - - -
RS Stock No. 756-4258
Mfr. Part No.RSF66B50B100P
BrandCynergy3
MYR209.88
Each
units
Float - Vertical 2NC Polyphenylene Sulfide - -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 756-4135
Mfr. Part No.SSF212XPM12
BrandCynergy3
MYR642.88
Each
units
Float - Horizontal NO/NC Stainless Steel 1m -20°C +120°C - - 500 mA 5bar - -
RS Stock No. 780-0258
Mfr. Part No.SSF67B50B150PM12
BrandCynergy3
MYR968.45
Each
units
Float - Vertical 2NC Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -
RS Stock No. 756-4185
Mfr. Part No.SSF67A25B225
BrandCynergy3
MYR928.29
Each
units
Float - Vertical NO/NC Stainless Steel 1m -20°C +135°C - - 600 mA 10bar Nitrile -
RS Stock No. 177-9140
Mfr. Part No.9037HG37
MYR592.25
Each
units
Float Switch - Screw In - Polypropylene - -30°C +105°C 230 (Single Phase) V, 475 (3 Phase) V 230V - - - -
RS Stock No. 144-9336
Mfr. Part No.5828802
BrandXylem
MYR623.63
Each
units
Float Switch - Cable - Polypropylene 6m 0°C +60°C - - - - - -
RS Stock No. 122-8405
Mfr. Part No.174200
MYR1,494.05
Each
units
Float - Vertical SPST NC PTFE 24in 0°C +100°C - - - 25psi - -
RS Stock No. 122-8423
Mfr. Part No.118126
MYR437.92
Each
units
Float - Horizontal SPST NO Stainless Steel 24in -40°C +149 (Oil) °C, +82 (Water) °C 240V - 60 mA dc, 80 mA ac 300psi - -
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