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IPG20 Intelligent Pump Guard

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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


  • 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

Operating Principal

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.

Further Information

D50 Heavy Duty Level Switch


  • 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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L Series

  • Stainless steel or Polypropylene
  • Built in manual override
  • 15 Amp 500 Volt SPDT Switch
  • Unique Seal-less coupling
  • Weatherproof to IP67
  •  Simple to install
  •  Fully serviceable


The L Series side entry level switch provides a reliable accurate and low cost solution to tank level control. The switch is available in all thermoplastic construction in a combination of 316 Stainless Steel and Polypropylene. The level switch can be supplied with a 500 Volt rated single pole double throw microswitch for general control circuit use or with a SPDT reed switch for low voltage low current applications. The L series level switch is built tough to give a long reliable service life in the most arduous applications.

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