The Float Switch Sensor is a reliable liquid level detection device used to monitor and control fluid levels in tanks, reservoirs, sumps, and containers. It operates using a simple mechanical float mechanism that opens or closes an internal switch based on the liquid level. This sensor is widely used in water level controllers, pumps, alarms, industrial automation, and home appliances due to its durability, simplicity, and maintenance-free operation.
Core Sensor Specifications
• Sensor Type: Liquid level float switch
• Detection Method: Mechanical float with internal switch
• Output Type: On/Off (digital contact)
• Switching Action: Normally Open / Normally Closed (orientation dependent)
Electrical & Interface
• Operating Voltage: Up to 220 V AC / 24 V DC (model dependent)
• Switching Current: Typically up to 10 A (model dependent)
• Output Interface: Two-wire / three-wire cable
• Signal Type: Dry contact (no voltage output)
• Cable Length: Factory-attached insulated cable
Performance Characteristics
• Accurate liquid level detection
• Stable and repeatable switching
• No power required for sensing
• Suitable for continuous operation
Physical Characteristics
• Sensor Body: Plastic enclosure (waterproof)
• Float Material: Plastic or foam-based
• Mounting Type: Vertical / side mounting (model dependent)
• Compact and rugged design
Compatibility
• Water pumps and motor controllers
• PLC and relay-based systems
• Arduino and microcontroller projects (with pull-up/down)
• Water tanks and sumps
• Industrial liquid control systems
Key Advantages
• Simple and robust construction
• No calibration required
• Long service life
• Works with wide voltage and current ranges
Technical Insights
• Switching logic changes with mounting orientation
• Must be used with external relay for high loads
• Not suitable for corrosive liquids unless specified
• Cable sealing ensures waterproof operation
Applications
• Water level controllers
• Pump automation systems
• Overfill and dry-run protection
• Liquid level alarms
• Industrial and domestic tanks
Pro Tip
• Verify NO/NC behavior before installation
• Use proper mounting to avoid false triggering
• Add relay or contactor for motor loads
• Ensure float moves freely without obstruction
Package Includes
• 1 × Float Switch Sensor