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Magnetic Float Sensor FS37A (Vertical)

Magnetic Float Sensor FS37A (Vertical)

Regular price Rs. 109
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  • Applications of this Switch include shipbuilding industry, generating equipment, petrochemical and food industry, water treatment equipment, dyeing, and finishing industry, and hydraulic machinery.
  • As long as the material used is in the correct shape and nature of any liquid or pressure, you can control the temperature.
  • Long-lasting life and easy to use.

Magnetic Float Sensor FS37A (Vertical)

A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. It is a simple structure, easy to use level control device; moreover, it is neither a complicated circuit nor does it provide power. This switch has a mechanical switch than the average small-sized switches.

A float switch is a device used to sense the level of liquid within a tank, it may actuate a pump, an indicator, an alarm, or other devices. Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, pumps, ponds, basement alarms, boats, air condition drain pans, pressure washers, carpet cleaning machine, reef aquarium, fluid control, ice machines, coffee pots, marine, automotive, automobiles, tropical fish tanks, evaporator coils, condensation line, in relays, or whatever your project may be. It can be easily converted from normally open to normally close by inverting the float.

Note: because the current that the switch can carry is much little(0.5A), you must use a relay or contactor when it is connected by a load, relay and contactor are not included here.

Check out our entire range of pH, Turbidity & Flow Sensors


  • Household Equipment such as overhead water tanks, Water purifiers.
  • Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, or whatever your project may be. Up float switch Contains no mercury Product.

Package Includes:

  • 1 x Magnetic Float Sensor FS37A (Vertical)


Sensor Type 

Magnetic Float Sensor 

Sensor Model 

FS37A Float Sensor 

Contact Rating


Switching Voltage

220 V

Contact Resistance

100 mΩ


11 x 8 x 5 cms 


50 grams

Shipping & Returns

  • All orders confirmed before 3 pm IST are shipped on the
    same day, barring rare pickup delays on holidays or disturbances
  • Delivery time in Metro cities is 1-3 days, Others it is
    3-7 days. It varies based on location, reliant on courier services
  • Return window: 7 days from receipt unless stated
    otherwise. No refunds/replacements after
  • Returns only for non-working/damaged products are accepted
  • Initiate return requests to our customer service team via Support ticket or contact us at +91-8123057137
  • Refunds are processed within 3-4 working days post inspection and approval.

For more details, please check our Shipping and Return Policy

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1. How do you use a magnetic float sensor?

  • The switch is located in the sensor's white stem. As the float rises or falls with the level of water in the tank, the magnet in the float activates the switch, and the signal obtained from the sensors is used in conjunction with the water level controllers to control the motor pump.

2. How does a magnetic water level sensor work?

  • Float level sensors are continuous level sensors featuring a magnetic float that rises and falls as liquid levels change. The movement of the float creates a magnetic field that actuates a hermetically sealed reed switch located in the stem of the level sensor, causing the switch to open or close.

3. How Do I Test A Float Switch With A MultiMeter?

  • Attach the MultiMeter leads to the float switch wires. The Multimeter should be set to the Ohms. The MultiMeter should read zero when the float hangs in the down position. Lifting the float will change the zero to one.

4. What is a magnetic float sensor?

  • A magnetic float sensor is electromagnetic on/off switch. It is useful for determining the amount of water in the overhead tank. The float of these sensors contains a permanent magnet. The switch is located in the sensor's white stem.