Water Float Switch (Water Level Sensor)

Water Float Switch (Water Level Sensor) 

A water float switch is an electromechanical level sensor used to detect and control the liquid level inside tanks, containers, or reservoirs. It operates using a floating element that rises or falls with the water level. This movement mechanically or magnetically actuates an internal switch, turning a circuit ON or OFF. Float switches are simple, reliable, and require no complex electronics, making them ideal for automatic pump control, alarms, and water management systems. They are available in vertical, horizontal, and cable (tethered) types and are commonly supplied in compact, waterproof SMD or industrial housings for easy installation.

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Features

• Simple and reliable operation
• Automatic ON/OFF level detection
• No external power required for sensing (passive switch)
• Long mechanical life
• Low cost and easy installation
• Compact and lightweight design
• Available in plastic or stainless steel body
• Corrosion and water resistant
• Normally Open (NO) or Normally Closed (NC) contacts
• Suitable for AC and DC circuits
• Minimal maintenance required

Applications

• Water tank level monitoring
• Automatic water pump control
• Overhead tank filling systems
• Sump pump systems
• Drainage and sewage systems
• Industrial liquid level control
• Aquarium and hydroponics systems
• Cooling systems and boilers
• Overflow and dry-run protection
• Irrigation systems