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. 519-258
BrandRS PRO
$15.32
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS Stock No. 519-248
BrandRS PRO
$10.41
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 130V 180V 700 mA - - -
RS Stock No. 519-242
BrandRS PRO
$12.55
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 140V 200V 1 A - - -
RS Stock No. 312-7164
BrandRS PRO
$122.24
Each
units
Float - Vertical Direct Load Stainless Steel 300mm -10°C +120°C 300V 300V 500 mA 10bar - -
RS Stock No. 762-1039
BrandRS PRO
$90.39
Each
units
Float - Horizontal NO/NC Stainless Steel 300mm -40°C +125°C 250V 200V 500 mA 10bar Silicone -
RS Stock No. 235-6204
BrandRS PRO
$129.37
Each
units
Float - Horizontal Direct Load Stainless Steel 300mm -10°C +120°C 300V 300V 500 mA 10bar - -
RS Stock No. 519-232
BrandRS PRO
$11.01
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS Stock No. 762-1036
BrandRS PRO
$69.17
Each
units
Float - Vertical NO/NC Stainless Steel 300mm -40°C +125°C 250V 200V 2 A - - -
RS Stock No. 519-236
BrandRS PRO
$9.79
Each
units
Float - Vertical Direct Load PP 300mm -20°C +80°C 140V 200V 700 mA - - -
New
RS Stock No. 191-9504
BrandRS PRO
$65.23
Each
units
Float - Internal - Polyphenylene Sulphide 1m -10°C +85°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9467
BrandRS PRO
$31.48
Each
units
Float - External, Vertical NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 174-8429
BrandRS PRO
$148.09
Each
units
Float - Horizontal External SPNO Stainless Steel 1m - +120°C 300V 300V 500 mA - - 0.5 A
New
RS Stock No. 188-0316
BrandRS PRO
$586.77
Each
units
Float - Flange Mount SPDT Aluminium (Enclosure), SS 316L (Float) - 0°C +130°C 250V 30V 3 (Inductive Load) A, 4 (Resistive Load) A 15 bar @ 130 °C, 19 bar @ 20 °C Nitrile 3 (Inductive Load) A, 4 (Resistive Load) A
RS Stock No. 191-9471
BrandRS PRO
$30.88
Each
units
Float - Vertical NO/NC Polyphenylene Sulphide 1m -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9474
BrandRS PRO
$28.76
Each
units
Float - Horizontal NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 174-8424
BrandRS PRO
$27.79
Each
units
Float - Horizontal External SPNO Nylon - -20°C +75°C 240V 120V 600 mA - Nitrile 0.6 A
RS Stock No. 191-9489
BrandRS PRO
$53.53
Each
units
Float - Vertical NO/NC Buna (Float), Nylon (Stem) 1m -20°C +75°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9468
BrandRS PRO
$29.68
Each
units
Float - External, Vertical NO/NC Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 600 mA
RS Stock No. 191-9485
BrandRS PRO
$27.99
Each
units
Float - External NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Silicone 600 mA
RS Stock No. 174-8415
BrandRS PRO
$32.19
Each
units
Float - Vertical Internal NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Nitrile 0.6 A
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