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Home > Floating Roof Detection with Displacer Switches
 Floating Roof Detection with Displacer Switches   Printer Friendly Version
The Proof-er® roof top control is designed for installation on "barrier" (floating roof) tanks. The control may be furnished with a lead displacer to prevent sparking. A stainless steel displacer is required if the control is to actuate in liquid as well as by the barrier.
Operating Principle Features Options Downloads Approvals
 
Operation is based upon simple buoyancy, whereby a spring is loaded with weighted displacers. Weights suspended from a range spring cause the spring to extend. As the floating roof contacts the weights, the load on the spring is reduced causing the spring to compress.

A magnetic sleeve connected to the spring moves within a non-magnetic barrier tube. As it moves into or out of the field of the switch magnet the switch is activated.

 

  • Single or dual stage
  • Lead or brass displacers
  • Spring protector
   

  • One or two switches
  • Tank connection
  • Displacer cable length
 
 Literature: (US English)
  Sales Literature
  Instruction Manual
  Electric Switch Manual
  Hermetically Sealed Switches
  Test Report FMEDA
  SIL Brochure

  
  • XP   

    		•
  • XP   

    		•
  • ELV   
    		•
  • XP   

  • IS   

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