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. 756-4201
Mfr. Part No.SSF67B50B100
BrandCynergy3
SGD345.71
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
SGD147.57
Each
units
Float - Horizontal NO/NC Stainless Steel 1m - +120°C - - 500 mA 5bar - -
RS Stock No. 431-8399
Mfr. Part No.SSF211X100
BrandCynergy3
SGD144.68
Each
units
Float - Horizontal NO/NC Stainless Steel 1m - +120°C - - 500 mA 5bar - -
RS Stock No. 519-258
BrandRS PRO
SGD10.53
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS Stock No. 339-5200
Mfr. Part No.LFL1-CK-N-PVC5
SGD118.19
Each
units
Float - Horizontal NAMUR Polypropylene 5m -20°C +70°C - - 2.2 mA 3bar - -
RS Stock No. 395-7094
Mfr. Part No.010-0391
SGD227.44
Each
units
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS Stock No. 348-7983
Mfr. Part No.RSF66A25B75
BrandCynergy3
SGD71.81
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 725-9868
Mfr. Part No.RSF86Y050T
BrandCynergy3
SGD31.86
Each
units
Float - Horizontal External NO/NC Polyphenylene Sulfide 1m -10°C +120°C - - 600 mA - - -
RS Stock No. 338-9716
Mfr. Part No.RSF46Y100RG
BrandCynergy3
SGD29.60
Each
units
Float - Horizontal Internal NO/NC Polyphenylene Sulfide 1m -10°C +120°C - - 600 mA - Silicone, Viton -
RS Stock No. 519-232
BrandRS PRO
SGD10.30
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS Stock No. 348-7999
Mfr. Part No.RSF66A25B100
BrandCynergy3
SGD71.81
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 756-4138
Mfr. Part No.SSF214X100
BrandCynergy3
SGD159.47
Each
units
Float - Horizontal NO/NC Stainless Steel 1m - - - - 500 mA 10bar - -
RS Stock No. 519-242
BrandRS PRO
SGD8.21
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 140V 200V 1 A - - -
RS Stock No. 780-0188
Mfr. Part No.SSF23XPM12
BrandCynergy3
SGD101.64
Each
units
Float - Vertical NO Stainless Steel - -20°C +120°C - - 500 mA 10bar Nitrile -
RS Stock No. 446-2569
Mfr. Part No.RSF66A50A100
BrandCynergy3
SGD78.52
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 379-4001
Mfr. Part No.MS10AW
BrandCynergy3
SGD100.88
Each
units
Float - - Direct Load PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS Stock No. 339-5216
Mfr. Part No.LFL1-BK-N-PVC5
SGD115.00
Each
units
Float - Horizontal NAMUR Polypropylene 5m -20°C +70°C - - 2.2 mA 2bar - -
RS Stock No. 348-8015
Mfr. Part No.RSF66A25B150
BrandCynergy3
SGD71.99
Each
units
Float - Vertical Direct Load Polyphenylene Sulfide - -10°C +85°C - - 600 mA - Nitrile -
RS Stock No. 395-7072
Mfr. Part No.010-3457
SGD133.46
Each
units
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS Stock No. 397-0564
Mfr. Part No.RSF84Y100R
BrandCynergy3
SGD25.72
Each
units
Float - Horizontal NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Silicone, Viton -
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