Float Switches

A float switch is a level sensor used to detect the level of liquid usually in a tank, container or well. The flotation part of the device sits on top of the liquid and will switch on the rise and fall of the liquid. Float switches 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.RS Components offer a wide range of high-quality horizontal and vertical devices from leading brands including Cynergy3, Pepperl + Fuchs, Gems Sensors, Telemecanique and of course RS PRO

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 the 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-proofAvailable with WRAS approvals.

What applications can be float switches used?

When emptying a tankWhen filling a tankFor alarm at high water levelFor 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
TWD561.00
Each
units
Float - Vertical SPST NO Nylon 24in -40°C +121°C - - - 10bar - -
RS Stock No. 395-7167
Mfr. Part No.187585
TWD1,979.00
Each
units
Float - Horizontal, Vertical Direct Load Polysulfone - -17.8°C +80°C - - 40 mA 150psi - -
RS Stock No. 122-8395
Mfr. Part No.165800
TWD741.00
Each
units
Float - Horizontal SPST NO/NC Polypropylene 24in -40°C +107.2°C - - - 3.4bar HNBR -
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. 122-8398
Mfr. Part No.164870
TWD3,178.00
Each
units
Float - Horizontal SPST NO/NC Stainless Steel 316 24in -40°C +121°C - - - 300psi - -
RS Stock No. 122-8415
Mfr. Part No.160405
TWD5,193.00
Each
units
Float - Vertical SPST NC Aluminium 24in -40°C +82 (Water) °C, +121 (Oil) °C - - - 250psi - -
RS Stock No. 122-8410
Mfr. Part No.LS-240-3E NC
TWD9,520.00
Each
units
Float - Cable SPST NC Stainless Steel 2m -40°C +80°C - - - 10bar - -
RS Stock No. 122-8421
Mfr. Part No.117712
TWD4,017.00
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. 122-8396
Mfr. Part No.165900
TWD741.00
Each
units
Float - Horizontal SPST NO/NC Nylon 24in -40°C +121.1°C - - - 3.4bar HNBR -
RS Stock No. 122-8405
Mfr. Part No.174200
TWD11,291.00
Each
units
Float - Vertical SPST NC PTFE 24in 0°C +100°C - - - 25psi - -
RS Stock No. 122-8412
Mfr. Part No.172625
TWD8,556.00
Each
units
Float - Vertical SPST NO Brass 24in -40°C +148.9°C - - - 500psi - -
RS Stock No. 122-8406
Mfr. Part No.156000
TWD4,330.00
Each
units
Float - Horizontal SPST NC Valox 25ft -40°C +80°C - 100V - 15psi - -
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. 122-8399
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. 395-9343
Mfr. Part No.011-1950
TWD3,042.00
Each
units
Float - Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
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. 122-8413
Mfr. Part No.172635
TWD28,536.00
Each
units
Float - Vertical SPST NO Stainless Steel 316 24in -40°C +148.9°C - - - 750psi - -
RS Stock No. 122-8409
Mfr. Part No.LS-240-3E NO
TWD9,520.00
Each
units
Float - Cable SPST NO Stainless Steel 2m -40°C +80°C - - - 10bar - -
RS Stock No. 122-8390
Mfr. Part No.164520
TWD2,626.00
Each
units
Float - Horizontal SPST NO/NC Polypropylene 24in -40°C +107.2°C - - - 6.8bar Buna N -
RS Stock No. 122-8427
Mfr. Part No.118128
TWD4,080.00
Each
units
Float - Horizontal SPST NO Stainless Steel 24in -40°C +82.2 (Water) °C, +149 (Oil) °C 240V - 60 mA dc, 80 mA ac 300psi - -