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 725-9852
製造零件編號RSF83Y100R
BrandCynergy3
HK$107.12
單位
Float - Horizontal External NO/NC Nylon 1m -20°C +75°C - - 600 mA - - -
RS庫存編號 174-8405
製造零件編號LLF77HNP
BrandCynergy3
HK$515.63
單位
Float - Horizontal External SPNO Polyvinylidene Fluoride - -10°C +105°C 300V 300V 1 A - Nitrile 1 A
RS庫存編號 174-8369
製造零件編號LLF43HFP
BrandCynergy3
HK$202.41
單位
Float - Horizontal Internal SPNO Nylon - -20°C +75°C 300V 300V 1 A - Nitrile 1 A
RS庫存編號 780-0210
製造零件編號SSF67A25B100PM12
BrandCynergy3
HK$1,397.25
單位
Float - Vertical NO/NC Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -
RS庫存編號 174-8375
製造零件編號LLF46YFP
BrandCynergy3
HK$193.72
單位
Float - Horizontal Internal SPNO Polyphenylene Sulphide - -10°C +120°C 240V 120V 600 mA - Nitrile 0.6 A
RS庫存編號 756-4182
製造零件編號SSF67A25B300
BrandCynergy3
HK$1,464.17
單位
Float - Vertical NO/NC Stainless Steel 1m -20°C +135°C - - 600 mA 10bar Nitrile -
RS庫存編號 338-9750
製造零件編號RSF76Y100RV
BrandCynergy3
HK$179.05
單位
Float - Horizontal External NO/NC Polyphenylene Sulfide 1m -10°C +105°C - - 600 mA - Viton -
RS庫存編號 122-8400
製造零件編號164860
HK$792.09
單位
Float - Horizontal SPST NO/NC Stainless Steel 316 24in -40°C +107°C - - - 100psi - -
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 756-4273
製造零件編號RSF56Y100J1/8
BrandCynergy3
HK$143.35
單位
Float - Vertical NO/NC Polyphenylene Sulfide 1m -20°C +75°C - - 600 mA - Nitrile -
RS庫存編號 174-8410
製造零件編號LLF78YNP
BrandCynergy3
HK$176.10
單位
Float - Horizontal External SPNO Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile 0.6 A
RS庫存編號 780-0220
製造零件編號SSF67A25B200PM12
BrandCynergy3
HK$1,415.88
單位
Float - Vertical NO/NC Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -
RS庫存編號 122-8383
製造零件編號201540
HK$138.14
單位
Float - Vertical SPST NO/NC Polypropylene 24in -40°C +100°C - - - 15psi - -
RS庫存編號 725-9909
製造零件編號SSF24X100
BrandCynergy3
HK$677.19
單位
Float - Vertical NO/NC Stainless Steel 1m -20°C +120°C - - 500 mA 10bar - -
RS庫存編號 124-2574
製造零件編號RSF57Y100GB/RS
BrandCynergy3
HK$312.85
單位
Float - Vertical NO/NC Polyvinylidene Fluoride 1m -10°C +105°C 240V 120V 600 mA - Viton -
RS庫存編號 338-9772
製造零件編號RSF54Y100RC
BrandCynergy3
HK$144.42
單位
Float - Vertical NO/NC Polypropylene 1m -20°C +100°C - - 600 mA - Nitrile -
RS庫存編號 780-0129
製造零件編號SH-3052
BrandCynergy3
HK$2,597.85
單位
Float - Horizontal - Aluminium - 0°C +100°C - - 5 A 20bar - -
RS庫存編號 124-2572
製造零件編號RSF57Y100GC/RS
BrandCynergy3
HK$312.85
單位
Float - Vertical NO/NC Polyvinylidene Fluoride 1m -10°C +105°C 240V 120V 600 mA - Nitrile -
RS庫存編號 177-9128
製造零件編號9037HG32LZ20
HK$872.54
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 124-2598
製造零件編號MC05A/RS
BrandCynergy3
HK$1,188.76
單位
Float - Cable Mount NO Stainless Steel 304 5m 0°C +80°C - 60V 250 mA 4bar - -