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 395-7145
製造零件編號169555
HK$412.18
單位
Float - Horizontal, Vertical Direct Load Polysulfone - -17.8°C +80°C - - 40 mA 150psi - -
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 395-7044
製造零件編號011-1700
HK$360.45
單位
Float - Horizontal, Vertical Relay Brass/NBR 1m -40°C +80°C - - - 10bar - -
RS庫存編號 122-8393
製造零件編號140620
HK$182.50
單位
Float - Horizontal SPST NO/NC Nylon 24in -40°C +121.1°C - - - 6.8bar - -
RS庫存編號 122-8388
製造零件編號76707
HK$287.69
單位
Float - Vertical SPST NC Polysulfone 72in -40°C +82.2°C - - - 50psi - -
RS庫存編號 122-8401
製造零件編號179445
HK$1,835.25
單位
Float - Horizontal SPST NO/NC Stainless Steel 316 24in -40°C +149°C - - - 300psi Viton -
RS庫存編號 122-8394
製造零件編號177100
HK$211.65
單位
Float - Horizontal SPST NO/NC Versaplast 24in -40°C +148.9°C - - - 6.8bar - -
RS庫存編號 122-8392
製造零件編號131100
HK$184.55
單位
Float - Horizontal SPST NO/NC Polypropylene 24in -40°C +107.2°C - - - 6.8bar - -
RS庫存編號 122-8402
製造零件編號74780
HK$596.54
單位
Float - Vertical SPST NO CPVC 24in -40°C +82.2°C - - - 15psi - -
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 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 122-8389
製造零件編號165570
HK$182.50
單位
Float - Horizontal SPST NO/NC Nylon 24in -40°C +121.1°C - - - 6.8bar Buna N -
RS庫存編號 122-8395
製造零件編號165800
HK$182.50
單位
Float - Horizontal SPST NO/NC Polypropylene 24in -40°C +107.2°C - - - 3.4bar HNBR -
RS庫存編號 122-8382
製造零件編號116826
HK$124.33
單位
Float - Vertical SPST NO Polypropylene 24in -40°C +66°C - - - 10bar - -
RS庫存編號 122-8380
製造零件編號42295
HK$131.56
單位
Float - Vertical SPST NO Polysulfone 24in -40°C +107°C - - - 3bar - -
RS庫存編號 122-8409
製造零件編號090-0022
HK$2,477.67
單位
Float - Cable SPST NO Stainless Steel 2m -40°C +80°C - - - 10bar - -
RS庫存編號 122-8424
製造零件編號117715
HK$970.79
單位
Float - Horizontal SPST NO Brass 24in -40°C +149°C 240V - 60 mA dc, 80 mA ac 100psi - -
RS庫存編號 122-8387
製造零件編號142545
HK$176.80
單位
Float - Vertical SPST NO/NC Polypropylene 22in -40°C +65.6°C - - - 150psi - -
RS庫存編號 122-8397
製造零件編號191080
HK$214.18
單位
Float - Horizontal SPST NC Noryl 26in -40°C +107.2°C - - - 6.8bar Buna N -
RS庫存編號 122-8408
製造零件編號090-0021
HK$1,292.70
單位
Float - Cable SPST NC Stainless Steel 2m -40°C +80°C - - - 10bar - -