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Home > Flanged & Sealed External Cages Liquid Float Level Switches
 Flanged & Sealed External Cages Liquid Float Level Switches   Printer Friendly Version
External cage type level switches are completely self-contained units designed for side mounting to a tank or vessel with threaded, socket weld or flanged pipe connections. These float-actuated controls have proven their reliability in process control for decades.

There are 2 basic designs:

- Flanged external cage

- Seal welded external cage

In hundreds of industrial applications throughout the petroleum refining, petrochemical production and power generation markets, these switches have demonstrated their worth through reliable and repeatable service.
Operating Principle Features Options Downloads Approvals
 
The buoyancy force of a process liquid on the float causes the float to ride on the liquid surface. The movement of the float with the liquid level moves an attraction sleeve into the field of the switch magnet, pulling the magnet toward the sleeve and actuating the switch.

 

  • Carbon steel or stainless steel welded float chamber
  • Sealed or flanged cages
  • Stainless steel float and trim
  • Service pressures to 138 bar (2000 psig)
  • Process temps. to +538° C (+1000° F)
  • Specific gravity ratings as low as 0.34
   

  • Interface calibration
  • Extreme temperature modifications
  • Customized installation dimensions
  • Customized exterior surface preparation and finish
  • Customized actuation levels
  • Vent and drain connections
 
 Literature: (UK English)
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  • XP   

  • XP   

  • ELV   
  • XP   

  • YES   
  • XP = Explosion Proof  •  IS = Intrinsically Safe  •  NI = Non-Incendive  •  NS = Non-Sparking  •  ELV = EMC/Low Voltage