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 756-4179
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 124-0140
製造零件編號LV42-7201
BrandFlowline
HK$1,358.84
單位
Float Level Switch - Vertical SPDT PP 20ft -20°C +80°C 250V - - 2bar - 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
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 906-9607
製造零件編號FSW2-DNPN-30
HK$751.37
單位
Float Switch - Vertical SPDT Polypropylene 359.8in 0°C +50°C 250V - - 2bar - 10 A
RS庫存編號 869-7573
製造零件編號RSF46YFP
BrandCynergy3
HK$153.26
單位
Float - Horizontal NO/NC Polyphenylene Sulfide - -10°C +120°C 240V 120V 600 mA - Nitrile -
RS庫存編號 762-1039
BrandRS PRO
HK$339.77
單位
Float - Horizontal NO/NC Stainless Steel 300mm -40°C +125°C 250V 200V 500 mA 10bar Silicone -
RS庫存編號 122-8407
製造零件編號090-0020
HK$1,292.70
單位
Float - Cable SPST NO Stainless Steel 2m -40°C +80°C - - - 10bar - -
RS庫存編號 869-7558
製造零件編號RSF156YFP
BrandCynergy3
HK$150.33
單位
Float - Vertical NO/NC Polyphenylene Sulfide - -10°C +120°C 240V 120V 600 mA - Nitrile -
RS庫存編號 756-4267
製造零件編號RSF58H100J1/8
BrandCynergy3
HK$204.41
單位
Float - Vertical NO/NC Polypropylene 1m -20°C +120°C - - 1 A - Nitrile -
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 122-8421
製造零件編號117712
HK$970.79
單位
Float - Horizontal SPST NO Stainless Steel 316 24in -40°C +149°C 240V - 60 mA dc, 80 mA ac 100psi - -
RS庫存編號 361-1805
製造零件編號RSF26Y050TG
BrandCynergy3
HK$204.98
單位
Float - Direct Mounting NC Polyphenylene Sulfide 500mm -10°C +120°C - - 600 mA - Silicone, Viton -
RS庫存編號 780-0223
製造零件編號SSF67A25B150PM12
BrandCynergy3
HK$1,562.85
單位
Float - Vertical NO/NC Stainless Steel - -20°C +135°C - - 600 mA 10bar Nitrile -
RS庫存編號 174-8426
BrandRS PRO
HK$115.87
單位
Float - Horizontal External SPNO Nylon - -20°C +75°C 240V 120V 600 mA - - 0.6 A
RS庫存編號 338-9700
製造零件編號RSF43Y100RF
BrandCynergy3
HK$132.06
單位
Float - Horizontal Internal NO/NC Nylon 1m -20°C +75°C - - 600 mA - Nitrile -
RS庫存編號 122-8414
製造零件編號144080
HK$1,610.80
單位
Float - Vertical SPST NC Aluminium 24in -40°C +148.9°C - - - 600psi - -
RS庫存編號 174-8424
BrandRS PRO
HK$135.18
單位
Float - Horizontal External SPNO Nylon - -20°C +75°C 240V 120V 600 mA - Nitrile 0.6 A
RS庫存編號 177-9140
製造零件編號9037HG37
HK$1,084.37
單位
Float Switch - Screw In - Polypropylene - -30°C +105°C 230 (Single Phase) V, 475 (3 Phase) V 230V - - - -
RS庫存編號 144-9337
製造零件編號5828803
BrandXylem
HK$1,271.90
單位
Float Switch - Cable - Polypropylene 13m 0°C +60°C - - - - - -