Magnetic Float Switch with Counter Weight

The Magnetic Float Switch with Counter Weight is a simple and reliable sensor used for water level sensing in tanks. It is commonly used in water tank overflow alarm systems, pump automation, and level monitoring applications.

This float switch works using a magnetic reed switch housed inside a sealed cylindrical body. A floating ring moves up or down with the water level due to buoyancy. When the water level rises, the floating ring moves upward and activates the reed switch inside, closing the circuit.

This model is a Normally Open (NO) type switch, which means the circuit closes when the water level rises to the sensing point.

The included counter weight allows the sensor to be hung vertically inside the tank without drilling or mounting holes. The counter weight keeps the sensor stable and upright in water, making it especially useful when:

• Tank drilling is not possible

• Multiple water level points need to be sensed

• Temporary or adjustable installation is required

The 1-meter wire makes it easy to connect the sensor to controllers, alarm systems, or automation devices.

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How It Works (Simple Explanation)

• Water level rises

• Floating ring moves upward

• Internal magnetic reed switch activates

• Electrical circuit closes

• Signal is sent to alarm, controller, or pump system

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Key Features

• Magnetic float-based water level sensor

• Normally Open (NO) contact

• Vertical hanging installation

• Comes with counter weight for stable positioning

• No drilling or tank modification required

• Suitable for multi-level sensing setups

• Durable and corrosion-resistant design

• Pre-attached 1 meter connection wire

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Applications

• Water tank overflow alarm systems

• Automatic pump control systems

• Water level monitoring

• Home and industrial tanks

• DIY automation projects

• Integration with controllers and relays

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Installation Type

• Vertical hanging type

• Sensor position adjustable by wire length and counter weight

• Can be used at different tank levels

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Technical Highlights

• Sensor type: Magnetic float switch

• Mounting: Vertical (hanging type)

• Contact type: Normally Open (NO)

• Cable length: 1 meter

• Suitable for water level sensing