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Home > Models A10/B10/C10 Wide Differential Displacer Switches
 Models A10/B10/C10 Wide Differential Displacer Switches   Printer Friendly Version
Wide Differential displacer switches are factory calibrated yet field-adjustable to operate over a wide level differential band and are available as single, dual and triple stage units.
Operating Principle Features Options Downloads Approvals
 
Operation is based upon simple buoyancy, whereby a spring is loaded with weighted displacers which are heavier than the liquid. Immersion of the displacers in the liquid results in buoyancy force change, which moves the spring upward.

Since the spring moves only when the level moves on a displacer, spring movement is always a small fraction of the level travel between displacers.

A magnetic sleeve is connected to the spring and operates within a non-magnetic barrier tube. Spring movement causes the magnetic sleeve to attract a pivoted magnet, actuating a switch mechanism located outside the barrier tube. Built-in limit stops prevent over stroking of the spring, under level surge conditions.

 

  • Single, dual or triple stage models
  • Choice of displacer material
  • Field-adjustable set points and differential
   

  • Tank configuration
  • Materials of construction
  • One, two or three switches
  • Displacer cable length
 
 Literature: (US English)
  Sales Literature
  Instruction Manual
  SIL Brochure
  Electric Switch Manual
  J Series Pneumatic Switch
  Series K Pneumatic Switch
  Hermetically Sealed Switches
  R Series High Temp Switch
  Test Report FMEDA

  
  • XP   

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  • ELV   
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  • XP   

  • IS   

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