Float Sensor Contact Type CSSP

Overview

The Float Sensor Contact Type (CSSP) is a liquid level detection device that operates using a mechanical float and electrical contact mechanism.

• Detects:

  • Liquid level (HIGH / LOW)

   

• Output:

  • Digital ON/OFF signal

   

• Designed for:

  • Tank level monitoring

  • Overflow / dry-run protection

   

It is a simple, reliable, and non-complex level sensing solution.

Working Principle

Buoyancy-Based Operation

• A float (hollow structure) rests on the liquid surface

• As liquid level changes:

  • Float moves up or down

   

Contact Swi

• Float contains a magnet

• Inside the stem is a reed switch (magnetic switch)

Operation

• Liquid level rises float moves up

• Magnet approaches reed switch

• Reed switch closes or opens

• Electrical output changes state

Acts as a level-triggered switch.

Output Characteristics

Digital Output

• Two states:

  • ON (closed contact)

  • OFF (open contact)

   

Contact Types

• Normally Open (NO)

• Normally Closed (NC)

Behavior depends on installation orientation.

Electrical Characteristics

• Works as a passive switch

• No poweri

Typical ratings:

• Voltage: up to ~100V220V (depends on model)

• Current: typically < 0.5A

Mechanical Components

• Float (plastic or stainless steel)

• Stem (housing reed switch)

• Magnet inside float

• Electrical leads / terminals

Detection Characteristics

Level Detection

• Detects specific fixed liquid level point

Switching Action

• Instant ON/OFF switching at threshold

Response

• Mechanical movement very fast switching

Operating Behavior

Level Rise

• Float rises switch changes state

Level Fall

• Float drops swion Effect

  • Inverting the sensor can:

    • Change NO NC behavior

     

  Environmental Characteristics

  • Suitable for:

    • Water

    • Oils

    • Non-corrosive liquids

     

  Material Considerations

  • Depends on:

    • Float material (plastic/SS)

    • Chemical compatibility

     

  Limitations

  • Only detects single point level (not continuous measurement)

  • Mechanical movement may:

    • Wear over long time

     

  • Not suitable for:

    • Highly viscous liquids

    • Strong turbulence environments

     

   

  Typical Connection

  • Two wires:

    • Acts like a switch in circuit

     

  a:

  • Level switch

  • Overflow protection device

  • Dry-run protection sensor

   

  Summary

  The Float Sensor Contact Type (CSSP) is a simple mechanical liquid level switch that:

  • Uses float + magnet + reed switch mechanism

  • Provides digital ON/OFF output

  • Requires no active electronics

  • Offers reliable and low-cost level detection

  • Is ideal for tank monitoring and safety systems

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