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 174-8388
製造零件編號LLF74Y100RM
BrandCynergy3
HK$192.76
單位
Float - Horizontal External SPNO Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Silicone 0.6 A
RS庫存編號 725-9830
製造零件編號RSF46H050TG
BrandCynergy3
HK$211.21
單位
Float - Horizontal Internal NO/NC Polyphenylene Sulfide 500mm -10°C +120°C - - 600 mA - Nitrile -
RS庫存編號 725-9937
製造零件編號RSF18Y100RF
BrandCynergy3
HK$149.98
單位
Float - Direct Mounting NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS庫存編號 492-8930
製造零件編號SSF67A25B150
BrandCynergy3
HK$1,606.29
單位
Float - Vertical Direct Load Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -
RS庫存編號 124-2557
製造零件編號RSF104Y100JN/RS
BrandCynergy3
HK$148.27
單位
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Nitrile -
RS庫存編號 174-8364
製造零件編號LLF47H100GF
BrandCynergy3
HK$470.13
單位
Float - Horizontal Internal SPNO Polyvinylidene Fluoride 1m -10°C +105°C 300V 300V 1 A - Nitrile 1 A
RS庫存編號 725-9931
製造零件編號RSF48Y100RF
BrandCynergy3
HK$124.82
單位
Float - Horizontal Internal NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS庫存編號 725-9849
製造零件編號RSF46H100RF
BrandCynergy3
HK$176.99
單位
Float - Horizontal Internal NO/NC Polyphenylene Sulfide 1m -10°C +105°C - - 600 mA - Nitrile -
RS庫存編號 725-9956
製造零件編號LLF59Y100JC
BrandCynergy3
HK$246.33
單位
Float - - NO - - - - - - - - - -
RS庫存編號 174-8396
製造零件編號LLF78H100RN
BrandCynergy3
HK$235.85
單位
Float - Horizontal External SPNO Polypropylene 1m -20°C +100°C 300V 300V 1 A - Nitrile 1 A
RS庫存編號 174-8377
製造零件編號LLF47HFP
BrandCynergy3
HK$494.87
單位
Float - Horizontal Internal SPNO Polyvinylidene Fluoride - -10°C +105°C 300V 300V 1 A - Nitrile 1 A
RS庫存編號 454-9127
製造零件編號SSF28X100
BrandCynergy3
HK$926.96
單位
Float - Vertical Direct Load Stainless Steel 350mm -10°C +120°C - - 500 mA 40bar - -
RS庫存編號 124-2553
製造零件編號TSSF212Y100/RS
BrandCynergy3
HK$907.16
單位
Float - Horizontal NO/NC Stainless Steel 304 (Stem), Stainless Steel 316 (Float) 1m -20°C +120°C 240V 120V 600 mA 10bar - -
RS庫存編號 124-2581
製造零件編號RSF77H100GV/RS
BrandCynergy3
HK$387.75
單位
Float - Horizontal NO/NC Polyvinylidene Fluoride 1m -10°C +105°C 300V 300V 1 A - Viton -
RS庫存編號 177-9132
製造零件編號9037HG30Z20
HK$1,084.37
單位
Float Switch - Screw In - Polypropylene - -22°F +220°F 230 (Single Phase) V, 475 (3 Phase) V 230V - - - -
RS庫存編號 124-2593
製造零件編號RSF107HVP/RS
BrandCynergy3
HK$381.04
單位
Float - Vertical NO/NC Polyvinylidene Fluoride - -10°C +105°C 300V 300V 1 A - Viton -
RS庫存編號 124-2566
製造零件編號RSF47Y100GG/RS
BrandCynergy3
HK$281.42
單位
Float - Horizontal NO/NC Polyvinylidene Fluoride 1m -10°C +105°C 240V 120V 600 mA - Viton -
RS庫存編號 780-0197
製造零件編號SSV66A35B135SM16
BrandCynergy3
HK$1,552.50
單位
Float - Vertical NO/NC Stainless Steel 1m -20°C +120°C - - 500 mA 20bar Nitrile -
RS庫存編號 174-8383
製造零件編號LLF73Y100RN
BrandCynergy3
HK$179.48
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 906-9522
製造零件編號CFS2-DNBPN-20
HK$237.22
單位
Float Switch - Cable SPDT Polypropylene 240.2in 0°C +50°C 250V - - 1bar - 10 A