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.
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Narrow or wide differential
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Variety of displacer materials available
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Field-adjustable set point and switch differential
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Materials of construction
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Tank connection
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Displacer cable length
 Literature: (US English)
Sales Literature
Instruction Manual
Electric Switch Manual
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XP
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XP
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ELV |
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XP
IS
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YES |
| XP = Explosion Proof • IS = Intrinsically Safe • NI = Non-Incendive • NS = Non-Sparking • ELV = EMC/Low Voltage |
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