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 122-8394
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 122-8423
製造零件編號118126
HK$837.72
單位
Float - Horizontal SPST NO Stainless Steel 24in -40°C +82 (Water) °C, +149 (Oil) °C 240V - 60 mA dc, 80 mA ac 300psi - -
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 122-8425
製造零件編號117716
HK$953.55
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 122-8392
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 395-7088
製造零件編號010-3089
HK$775.80
單位
Float - Horizontal, Vertical Relay Stainless Steel 1m -40°C +150°C - - - 30bar - -
RS庫存編號 122-8426
製造零件編號118127
HK$594.26
單位
Float - Horizontal SPST NO Brass 24in -40°C +82.2 (Water) °C, +149 (Oil) °C 240V - 60 mA dc, 80 mA ac 300psi - -
RS庫存編號 122-8390
製造零件編號164520
HK$292.89
單位
Float - Horizontal SPST NO/NC Polypropylene 24in -40°C +107.2°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 122-8404
製造零件編號174100
HK$2,916.17
單位
Float - Vertical SPST NO PTFE 24in 0°C +100°C - - - 25psi - -
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 122-8420
製造零件編號117711
HK$869.40
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 122-8381
製造零件編號142505
HK$138.14
單位
Float - Vertical SPST NO Polypropylene 24in -40°C +107°C - - - 3bar - -
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 122-8401
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 122-8413
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 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 - -