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Float Switch: What is It and How Does It Work?

In simple terms, a float switch is a device in a waterproof-like case; it is used to put off and on a pump to be relative in water level in a container or a water tank. Basically speaking, a float switch’s function is to detect the level of a liquid in a tank.

Float Switches

Therefore, considering the water level, it tends to close and open an electrical circuit that pumps water in and out of the tank. Most engineers have a dependent attitude on float switches. When they want to find out the water level in a container or reservoir, they use float switches. 

While it floats on the water or liquid, it automatically serves as a switch to monitor when the level goes up or down.

  • They are usually cost-effective.
  • Able to be used in different forms of liquid
  • They are reliable, and this why most engineers make use of them.
  • The device creates an alarm to notify users.

Float Switch Wiring

For electrical alarms and signals predicated on closed and open positions, float switch wiring is crucial. But users must take caution to read the production directive on how to use normally open float switch and normally closed float switch.

  • Normally Open Float Switch: it is important to understand that when your electrical circuit is closed, it is used in an up position as it pulls the turns downwards in an open position.
  • Normally Closed Float Switch: This confuses most people. When the electrical circuit is in the downward position, then it is noted to be closed. But when the electrical circuit is in the upward position, then it is noted to be open.

Types Of Float Switches

There are different types of float switches, which will be given in the following or preceding instances:

MPM Series

A double liquid-proof chamber characterizes the MPM series. This, in essence, gives the protection and reliability needed for the safety of the float switch in the water. For sewage water application, the float switches have the fitted shape and size necessary to accomplish their function.

But for the MPM series, its electrical circuit opens and closes at an angle of +45 degrees cent. This allows the fluid level to be defined by the cable length in the order of the counterweight.

KPM series

Most people go for this particular series because it has a high level of durability and reliability. Also, this series is most suitable for clean water and a variety of media. Similarly,  its electrical circuit opens and closes at an angle of +45 degrees cent. This allows the fluid level to be defined by the cable length in the order of the counterweight.

JPM series

This is quite different from other series in many ways. For the JPM  series, its tilt level comprises a heavy body, not having any form of irregularity; this does not necessarily need any external counterweight. 

For these reasons, it can flow smoothly in industrial wastewater and turbulent water.

How Does Float Switch Work

Basically, the float switch moves in the flow of water level. It can be water or any form of liquid. Like a water pump, the electrical circuit can automatically be turned off or on. Those float switches, with the assistance of gravity, usually have interior mechanical switches.

Conclusion

In all, mechanical engineering has been made easier with float switches when checking water levels or liquid state in a tank or container. Also, studying the types and how it works enables for effective use. Find out the type and find out which is suitable for your use.

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