D40 Heavy Duty Single Point Level Regulator


  • 5 to 500V AC 15A 1.5kW (2HP) Switch
  • No metal parts in contact with liquids
  • 40mm level change on to off or off to on
  • Highly reliable magnetic action
  • Fully sealed IP67 electrical housing
  • M20 cable gland built in
  • Mounting brackets supplied


The D40 level switch operates on Archimedes principle. When the non floating Polypropylene displacer suspended from the switch is immersed in liquid its weight is reduced by an amount equal to the weight of the liquid it displaces. This weight change is detected by a magnet and is used to actuate a powerful switch inside the electrical head of the D40. The D40 is designed to be used in water with a specific gravity of 0.95 or greater.


  • Confined locations in sumps and pits
  • Bund area warning alarms
  • Cooling tower water level control
  • Bilge water level alarm for boats
  • Suits effluent & high solids uses
  • Suitable for sea water & chemicals
  • Level monitoring in wells & bores

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