D50 Heavy Duty Level Switch

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  • High and low floatless level control for tanks and sumps
  • 2 HP 1.5kW 20 AMP 500V S.P.D.T switch
  • No metal parts in contact with liquids
  • Heavy duty all metal housing
  • Weatherproof to IP67
  • Super reliable magnetic action


  • Level control in confi ned or tight locations
  • Suitable for pump in or pump out applications
  • Water tank level control
  • Effluent and liquid waste level control
  • Suits slurry and high solid applications
  • Suitable for use in sea water, acids and many chemicals
  • Works in sumps. pits, bores, tanks, wells or bunds


The D50 two position level switch operates on Archimedes Principle. When non floating solid
displacers suspended from the switch, are immersed in liquid their weight is reduced by an amount
equal to the weight of the liquid they displace. The weight change is detected and used to actuate
a magnetically isolated switch. Surface agitation, froth, floating or submerged solids do not affect the action of the
D50 switch. The displacement principle depends on the specific gravity of the liquid in which the displacers are
suspended. The D50 is set to operate in water with a specific gravity of 0.95 or greater.

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