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 228-1964
製造零件編號RSF14Y050RF
BrandCynergy3
HK$161.87
單位
Float - Direct Mounting Direct Load Polypropylene 500mm -20°C +100°C - - 600 mA - Nitrile -
RS庫存編號 350-2060
製造零件編號LFL2-CK-U-PUR5
HK$502.68
單位
Float - Horizontal Direct Load Polypropylene 5m +5°C +70°C - - 1 A dc, 3 A ac 3bar - -
RS庫存編號 725-9899
製造零件編號RSF56H050TB
BrandCynergy3
HK$204.93
單位
Float - Vertical NO/NC Polyphenylene Sulfide 1m -10°C +120°C - - 1 A - Nitrile -
RS庫存編號 446-2575
製造零件編號RSF66A50A150
BrandCynergy3
HK$368.45
單位
Float - Vertical Direct Load Polyphenylene Sulfide 1m -10°C +85°C - - 600 mA - Nitrile -
RS庫存編號 395-7072
製造零件編號010-3457
HK$713.73
單位
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS庫存編號 756-4135
製造零件編號SSF212XPM12
BrandCynergy3
HK$983.25
單位
Float - Horizontal NO/NC Stainless Steel 1m -20°C +120°C - - 500 mA 5bar - -
RS庫存編號 289-1319
製造零件編號RSF46Y050TG
BrandCynergy3
HK$146.97
單位
Float - Horizontal Internal NO/NC Polyphenylene Sulfide 500mm -10°C +120°C - - 600 mA - Viton -
RS庫存編號 228-1992
製造零件編號RSF34W100RF
BrandCynergy3
HK$178.98
單位
Float - Horizontal NO/NC Polypropylene 1m -20°C +100°C - - 5 A - Nitrile -
RS庫存編號 235-6204
BrandRS PRO
HK$529.41
單位
Float - Horizontal Direct Load Stainless Steel 300mm -10°C +120°C 300V 300V 500 mA 10bar - -
RS庫存編號 756-4141
製造零件編號SSF215XPM12
BrandCynergy3
HK$1,039.90
單位
Float - Horizontal NO/NC Stainless Steel 1m - - - - 500 mA 10bar - -
RS庫存編號 756-4179
製造零件編號SSV66A200E1GP
BrandCynergy3
HK$931.50
單位
Float - Vertical NO/NC Stainless Steel - - - - - 500 mA 20bar - -
RS庫存編號 312-7164
BrandRS PRO
HK$474.89
單位
Float - Vertical Direct Load Stainless Steel 300mm -10°C +120°C 300V 300V 500 mA 10bar - -
RS庫存編號 756-4258
製造零件編號RSF66B50B100P
BrandCynergy3
HK$375.10
單位
Float - Vertical 2NC Polyphenylene Sulfide - -10°C +85°C - - 600 mA - Nitrile -
RS庫存編號 350-2098
製造零件編號LFL2-BK-U-CSM5
HK$534.27
單位
Float - Horizontal Direct Load Polypropylene 5m -20°C +90°C - - 1 A dc, 3 A ac 2bar - -
RS庫存編號 431-8412
製造零件編號SSF213T050
BrandCynergy3
HK$762.90
單位
Float - Horizontal NO/NC Stainless Steel 500mm - +120°C - - 100 mA 5bar - -
RS庫存編號 339-5200
製造零件編號LFL1-CK-N-PVC5
HK$476.33
單位
Float - Horizontal NAMUR Polypropylene 5m -20°C +70°C - - 2.2 mA 3bar - -
RS庫存編號 869-7722
製造零件編號LM10BW
BrandCynergy3
HK$1,288.26
單位
Float - Cable NC Polypropylene 5m 0°C +55°C 250V 110V 10 A 10bar - -
RS庫存編號 519-248
BrandRS PRO
HK$55.03
單位
Float - Vertical Direct Load PP 300mm -20°C +80°C 130V 180V 700 mA - - -
RS庫存編號 348-8037
製造零件編號RSF64BEXS
BrandCynergy3
HK$470.92
單位
Float - Vertical Direct Load Polyphenylene Sulfide 1.5m 0°C +75°C - - 600 mA - - -
RS庫存編號 780-0248
製造零件編號SSF67A50A150PM12
BrandCynergy3
HK$1,499.38
單位
Float - Vertical 2NO Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -