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. 122-8404
Mfr. Part No.174100
$576.96
Each
units
Float - Vertical SPST NO PTFE 24in 0°C +100°C - - - 25psi - -
RS Stock No. 174-8385
Mfr. Part No.LLF74H100RN
BrandCynergy3
$51.17
Each
units
Float - Horizontal External SPNO Polypropylene 1m -20°C +100°C 300V 300V 1 A - Nitrile 1 A
RS Stock No. 780-0185
Mfr. Part No.SSV66A35B85SM16
BrandCynergy3
$357.80
Each
units
Float - Vertical NO/NC Stainless Steel 1m -20°C +120°C - - 500 mA 20bar Nitrile -
RS Stock No. 144-9338
Mfr. Part No.5828804
BrandXylem
$351.29
Each
units
Float Switch - Cable - Polypropylene 20m 0°C +60°C - - - - - -
RS Stock No. 756-4176
Mfr. Part No.SSF67A25B200
BrandCynergy3
$371.74
Each
units
Float - Vertical NO/NC Stainless Steel 1m -20°C +135°C - - 600 mA 10bar Nitrile -
RS Stock No. 756-4309
Mfr. Part No.LITTLE-EX-20M
BrandCynergy3
$460.81
Each
units
Float - Horizontal, Vertical NO/NC PE 20m 0°C +55°C - - 21.4 mA 10bar - -
RS Stock No. 122-8403
Mfr. Part No.133299
$802.82
Each
units
Float - Vertical SPDT NO Teflon 24in -40°C +148.9°C - - - 30psi - -
RS Stock No. 780-0232
Mfr. Part No.SSF67A25B250PM12
BrandCynergy3
$343.31
Each
units
Float - Vertical NO/NC Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -
RS Stock No. 756-4172
Mfr. Part No.SSV66A141S1GP
BrandCynergy3
$239.83
Each
units
Float - Vertical NO/NC Stainless Steel 1m - - - - 500 mA 30bar - -
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