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. 395-7066
Mfr. Part No.011-1750
£63.40
Each
Units
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 20bar - -
RS Stock No. 395-7072
Mfr. Part No.010-3457
£66.60
Each
Units
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS Stock No. 395-7088
Mfr. Part No.010-3089
£72.50
Each
Units
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS Stock No. 122-8422
Mfr. Part No.118125
£51.40
Each
Units
Float - Horizontal SPST NO Brass 24in -40°C +149 (Oil) °C, +82 (Water) °C 240V - 60 mA dc, 80 mA ac 300psi - -
RS Stock No. 395-7044
Mfr. Part No.011-1700
£33.70
Each
Units
Float - Horizontal, Vertical Relay Brass/NBR 1m -40°C +80°C - - - 10bar - -
RS Stock No. 122-8411
Mfr. Part No.149350
£92.20
Each
Units
Float - Vertical SPST NC Brass 25ft -40°C +110 (Oil) °C, +82 (Water) °C - - - 150psi - -
RS Stock No. 395-7094
Mfr. Part No.010-0391
£110.20
Each
Units
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS Stock No. 122-8381
Mfr. Part No.142505
£112.79
Each
Units
Float - Vertical SPST NO Polypropylene 24in -40°C +107°C - - - 3bar - -
RS Stock No. 122-8394
Mfr. Part No.177100
£18.70
Each
Units
Float - Horizontal SPST NO/NC Versaplast 24in -40°C +148.9°C - - - 6.8bar - -
RS Stock No. 395-7145
Mfr. Part No.169555
£44.00
Each
Units
Float - Horizontal, Vertical Direct Load Polysulfone - -17.8°C +80°C - - 40 mA 150psi - -
RS Stock No. 122-8415
Mfr. Part No.160405
£117.10
Each
Units
Float - Vertical SPST NC Aluminium 24in -40°C +121 (Oil) °C, +82 (Water) °C - - - 250psi - -
RS Stock No. 122-8399
Mfr. Part No.164850
£69.60
Each
Units
Float - Horizontal SPST NO/NC Stainless Steel 316 24in -40°C +121°C - - - 100psi - -
RS Stock No. 122-8406
Mfr. Part No.156000
£96.30
Each
Units
Float - Horizontal SPST NC Valox 25ft -40°C +80°C - 100V - 15psi - -
RS Stock No. 395-9343
Mfr. Part No.011-1950
£66.60
Each
Units
Float - Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS Stock No. 122-8390
Mfr. Part No.164520
£53.23
Each
Units
Float - Horizontal SPST NO/NC Polypropylene 24in -40°C +107.2°C - - - 6.8bar Buna N -
RS Stock No. 122-8385
Mfr. Part No.177818
£36.77
Each
Units
Float - Vertical SPST NO/NC Nylon 24in -40°C +121°C - - - 10.3bar - -
RS Stock No. 122-8408
Mfr. Part No.090-0021
£110.50
Each
Units
Float - Cable SPST NC Stainless Steel 2m -40°C +80°C - - - 10bar - -
RS Stock No. 122-8409
Mfr. Part No.090-0022
£211.70
Each
Units
Float - Cable SPST NO Stainless Steel 2m -40°C +80°C - - - 10bar - -
RS Stock No. 395-7050
Mfr. Part No.011-1900
£51.80
Each
Units
Float - Horizontal, Vertical Relay Brass/NBR 1m -40°C +80°C - - - 10bar - -
RS Stock No. 122-8410
Mfr. Part No.090-0023
£211.70
Each
Units
Float - Cable SPST NC Stainless Steel 2m -40°C +80°C - - - 10bar - -