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. 122-8384
Mfr. Part No.162745
TWD6,967.00
Each
units
Float - Vertical SPST NO Nylon 24in -40°C +121°C - - - 10bar - -
RS Stock No. 122-8425
Mfr. Part No.117716
TWD4,164.00
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. 122-8413
Mfr. Part No.172635
TWD27,821.00
Each
units
Float - Vertical SPST NO Stainless Steel 316 24in -40°C +148.9°C - - - 750psi - -
RS Stock No. 395-7066
Mfr. Part No.011-1750
TWD2,851.00
Each
units
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 20bar - -
RS Stock No. 122-8407
Mfr. Part No.090-0020
TWD4,969.00
Each
units
Float - Cable SPST NO Stainless Steel 2m -40°C +80°C - - - 10bar - -
RS Stock No. 122-8381
Mfr. Part No.142505
TWD1,942.00
Each
units
Float - Vertical SPST NO Polypropylene 24in -40°C +107°C - - - 3bar - -
RS Stock No. 122-8386
Mfr. Part No.173250
TWD2,241.00
Each
units
Float - Vertical SPST NO PVDF 24in -40°C +121°C - - - 3bar - -
RS Stock No. 122-8403
Mfr. Part No.133299
TWD15,711.00
Each
units
Float - Vertical SPDT NO Teflon 24in -40°C +148.9°C - - - 30psi - -
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. 395-7139
Mfr. Part No.169556
TWD1,979.00
Each
units
Float - Horizontal, Vertical Direct Load Polysulfone - -17.8°C +80°C - - 40 mA 150psi - -
RS Stock No. 122-8414
Mfr. Part No.144080
TWD6,430.00
Each
units
Float - Vertical SPST NC Aluminium 24in -40°C +148.9°C - - - 600psi - -
RS Stock No. 395-7072
Mfr. Part No.010-3457
TWD2,994.00
Each
units
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS Stock No. 395-7044
Mfr. Part No.011-1700
TWD1,645.00
Each
units
Float - Horizontal, Vertical Relay Brass/NBR 1m -40°C +80°C - - - 10bar - -
RS Stock No. 395-9343
Mfr. Part No.011-1950
TWD2,994.00
Each
units
Float - Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS Stock No. 122-8399
Mfr. Part No.164850
TWD3,129.00
Each
units
Float - Horizontal SPST NO/NC Stainless Steel 316 24in -40°C +121°C - - - 100psi - -
RS Stock No. 122-8424
Mfr. Part No.117715
TWD3,822.00
Each
units
Float - Horizontal SPST NO Brass 24in -40°C +149°C 240V - 60 mA dc, 80 mA ac 100psi - -
RS Stock No. 122-8382
Mfr. Part No.116826
TWD2,305.00
Each
units
Float - Vertical SPST NO Polypropylene 24in -40°C +66°C - - - 10bar - -
RS Stock No. 122-8426
Mfr. Part No.118127
TWD2,631.00
Each
units
Float - Horizontal SPST NO Brass 24in -40°C +82.2 (Water) °C, +149 (Oil) °C 240V - 60 mA dc, 80 mA ac 300psi - -
RS Stock No. 122-8404
Mfr. Part No.174100
TWD11,291.00
Each
units
Float - Vertical SPST NO PTFE 24in 0°C +100°C - - - 25psi - -
RS Stock No. 122-8398
Mfr. Part No.164870
TWD3,129.00
Each
units
Float - Horizontal SPST NO/NC Stainless Steel 316 24in -40°C +121°C - - - 300psi - -