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庫存編號 519-242
BrandRS PRO
HK$40.42
單位
Float - Vertical Direct Load PP 300mm -20°C +80°C 140V 200V 1 A - - -
RS庫存編號 519-258
BrandRS PRO
HK$60.09
單位
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS庫存編號 519-232
BrandRS PRO
HK$63.69
單位
Float - Vertical Direct Load PP 300mm -20°C +80°C 250V 200V 700 mA - - -
RS庫存編號 519-236
BrandRS PRO
HK$52.32
單位
Float - Vertical Direct Load PP 300mm -20°C +80°C 140V 200V 700 mA - - -
RS庫存編號 235-6204
BrandRS PRO
HK$761.92
單位
Float - Horizontal Direct Load Stainless Steel 300mm -10°C +120°C 300V 300V 500 mA 10bar - -
RS庫存編號 519-248
BrandRS PRO
HK$55.62
單位
Float - Vertical Direct Load PP 300mm -20°C +80°C 130V 180V 700 mA - - -
RS庫存編號 312-7164
BrandRS PRO
HK$653.02
單位
Float - Vertical Direct Load Stainless Steel 300mm -10°C +120°C 300V 300V 500 mA 10bar - -
RS庫存編號 174-8428
BrandRS PRO
HK$804.31
單位
Float - Horizontal Internal SPNO Stainless Steel 1m - +120°C 300V 300V 500 mA - - 0.5 A
RS庫存編號 174-8420
BrandRS PRO
HK$157.50
單位
Float - Horizontal External SPNO Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Nitrile 0.6 A
RS庫存編號 174-8417
BrandRS PRO
HK$160.83
單位
Float - Vertical Internal NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - - 0.6 A
RS庫存編號 762-1036
BrandRS PRO
HK$331.58
單位
Float - Vertical NO/NC Stainless Steel 300mm -40°C +125°C 250V 200V 2 A - - -
RS庫存編號 174-8429
BrandRS PRO
HK$804.31
單位
Float - Horizontal External SPNO Stainless Steel 1m - +120°C 300V 300V 500 mA - - 0.5 A
RS庫存編號 762-1039
BrandRS PRO
HK$382.72
單位
Float - Horizontal NO/NC Stainless Steel 300mm -40°C +125°C 250V 200V 500 mA 10bar Silicone -
RS庫存編號 174-8424
BrandRS PRO
HK$138.52
單位
Float - Horizontal External SPNO Nylon - -20°C +75°C 240V 120V 600 mA - Nitrile 0.6 A
RS庫存編號 174-8415
BrandRS PRO
HK$160.83
單位
Float - Vertical Internal NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Nitrile 0.6 A
RS庫存編號 174-8427
BrandRS PRO
HK$126.73
單位
Float - Horizontal External SPNO Polypropylene - -20°C +100°C 240V 120V 600 mA - - 0.6 A
RS庫存編號 174-8419
BrandRS PRO
HK$149.38
單位
Float - Horizontal External SPNO Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 0.6 A
RS庫存編號 174-8426
BrandRS PRO
HK$119.04
單位
Float - Horizontal External SPNO Nylon - -20°C +75°C 240V 120V 600 mA - - 0.6 A
RS庫存編號 174-8411
BrandRS PRO
HK$142.54
單位
Float - Horizontal Internal SPNO Nylon 1m -20°C +75°C 240V 120V 600 mA - Nitrile 0.6 A
RS庫存編號 174-8412
BrandRS PRO
HK$150.74
單位
Float - Horizontal Internal SPNO Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Nitrile 0.6 A