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 756-4236
製造零件編號RSF66A25B100P
BrandCynergy3
HK$393.30
單位
Float - Vertical NO/NC Polyphenylene Sulfide - -10°C +85°C - - 600 mA - Nitrile -
RS庫存編號 122-8410
製造零件編號090-0023
HK$2,229.90
單位
Float - Cable SPST NC Stainless Steel 2m -40°C +80°C - - - 10bar - -
RS庫存編號 122-8413
製造零件編號172635
HK$7,208.69
單位
Float - Vertical SPST NO Stainless Steel 316 24in -40°C +148.9°C - - - 750psi - -
RS庫存編號 756-4277
製造零件編號RSF58Y100J1/8
BrandCynergy3
HK$133.88
單位
Float - Vertical NO/NC Polypropylene - -20°C +100°C - - - - Nitrile -
RS庫存編號 869-7567
製造零件編號RSF158YFP
BrandCynergy3
HK$130.35
單位
Float - Vertical NO/NC Polypropylene - -20°C +100°C 240V 120V 600 mA - Nitrile -
RS庫存編號 174-8389
製造零件編號LLF76H100RN
BrandCynergy3
HK$259.90
單位
Float - Horizontal External SPNO Polyphenylene Sulphide 1m -10°C +120°C 300V 300V 1 A - Nitrile 1 A
RS庫存編號 174-8406
製造零件編號LLF77YNP
BrandCynergy3
HK$369.58
單位
Float - Horizontal External SPNO Polyvinylidene Fluoride - -10°C +105°C 240V 120V 600 mA - Nitrile 0.6 A
RS庫存編號 124-2554
製造零件編號TSSF212H100/RS
BrandCynergy3
HK$932.48
單位
Float - Horizontal NO/NC Stainless Steel 304 (Stem), Stainless Steel 316 (Float) 1m -20°C +120°C 300V 300V 1 A 10bar - -
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 379-4045
製造零件編號FFSMC10BW
BrandCynergy3
HK$1,210.95
單位
Float - - Direct Load PE 5m 0°C +55°C - - 1 A dc, 4 A ac 10bar - -
RS庫存編號 725-9892
製造零件編號RSF56H100R1/8
BrandCynergy3
HK$207.00
單位
Float - Vertical NO/NC Polyphenylene Sulfide 1m -10°C +120°C - - 1 A - Nitrile -
RS庫存編號 124-2556
製造零件編號SSF50X100X-C/RS
BrandCynergy3
HK$1,341.79
單位
Float - Flange Mount NO/NC Stainless Steel 304 (Stem), Stainless Steel 316 (Float) 1m - +80°C 240V 200V 500 mA 20bar - -
RS庫存編號 756-4172
製造零件編號SSV66A141S1GP
BrandCynergy3
HK$856.98
單位
Float - Vertical NO/NC Stainless Steel 1m - - - - 500 mA 30bar - -
RS庫存編號 122-8384
製造零件編號162745
HK$138.14
單位
Float - Vertical SPST NO Nylon 24in -40°C +121°C - - - 10bar - -
RS庫存編號 184-5073
製造零件編號S36DA/F84
BrandMobrey
HK$5,407.36
單位
Float Switch Liquid Level Alarm and Pump Control Side Mount - Aluminium Alloy - - +400°C 440V 240V 5 A 33.8bar Non-Asbestos Sheet -
RS庫存編號 174-8419
BrandRS PRO
HK$134.10
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 762-1036
BrandRS PRO
HK$274.09
單位
Float - Vertical NO/NC Stainless Steel 300mm -40°C +125°C 250V 200V 2 A - - -
RS庫存編號 174-8386
製造零件編號LLF74Y100RN
BrandCynergy3
HK$189.14
單位
Float - Horizontal External SPNO Polypropylene 1m -20°C +100°C 240V 120V 600 mA - Nitrile 0.6 A
全新
RS庫存編號 188-9183
製造零件編號72B100001000
BrandFinder
HK$659.95
單位
Float Fluid Level Regulation - - Polypropylene 10m - +50 (Liquid)°C 250V - 10 A - - 10 A
RS庫存編號 288-9344
製造零件編號RSF56Y050TB
BrandCynergy3
HK$152.30
單位
Float - Vertical NO/NC Polyphenylene Sulfide 500mm -20°C +120°C 240V 120V 600 mA - Silicone, Viton 600 mA