Magnetic level gauges

Magnetic level gauges in many different shapes, sizes and materials.

The operating principles of magnetic level gauges

Magnetic level gauges work on the principle of communicating vessels, therefore the level in the measuring chamber will be the same as the level in the vessel. The measuring chamber is fitted with a float, which has a magnet inside. The float with magnet will float on the medium and the magnet in the float will turn the flaps of the indicating rail.

Magnetic level gauges

Magnetic level gauges


The float in the measuring tube is standard not pressurized and has no magnetic or mechanical guidance. This construction makes the float less dangerous than a float which is standard pressurized. When necessary Hadro can produce a pressurized float. With the below mentioned process conditions it is possible to select a float which will float on the medium.

  • Medium
  • Density
  • Working pressure
  • Temperature

The flaps of magnetic level gauges

Each flap in the indicating rail is fitted with a permanent magnet which makes our level gauge unaffected by shocks, vibrations and high temperatures. Also moisture and / or an aggressive environment are no problem for this level gauge.

This magnetic level gauge is available with a full plastic indication rail or with stainless steel flaps in a aluminium or stainless steel 316 housing.

Because of the construction of the flaps, one side white and on the other red / orange it is possible to see the level over a greater distance or in darker places.

With the available “Pointers” it is possible to set the visual limits on the indicating rail on every level you require.

When the magnetic level gauge is fitted with magnetic switches it is possible to get a signal. With more switches you can make a pump control (pump on / off) and / or create a high / low alarm. Beside or instead of level switches a reedchain transmitter can be mounted, this reedchain has an standard output signal of 4-20 mA.

Magnetic level gauge are also suitable for interface reading. The float will sink into the medium with the lower density and will float on the medium with the higher density.

Our appliances are in addition to the PED also approved by: LRS and BV for shipping.

Magnetic level gauge models

In order to fulfill all wishes, several standard models available, namely:

  • Pointer D
  • Pointer F
  • Pointer M
  • Pointer R
  • Pointer L


Special models

Beside the above mentioned types we can manufacture special models. We can make models with a coating (lining) from E-CTFE, PFA or ETFA, models made from plastic, Hastelloy, Monel, Titanium or 254 SMo. We also produce magnetic level gauge with (steam)jacket for heating of cooling. For further information please contact one of our technical sales engineers.


Magnetic level gauge Pointer D

With two or more process connections for mounting on the side of a vessel. This design is suitable for many different applications, for example condensate tanks, LPG tanks etc.

Magnetic level gauge Pointer F

With one process connection on the bottom, this type is suitable for mounting above a tank. This design is mostly used for storage tank below the surface.

Magnetic level gauge Pointer M

With two or more process connections for mounting on the side of a vessel. This design is specially made for evaporating applications.

Magnetic level gauge Pointer R

With two process connections at the end of the level gauge, this type is suitable for mounting between two pipelines.

Magnetic level gauge Pointer L

With one process connection for mounting on the side of a vessel. This model is often used for day tanks for ships.

The advantages

  • Standard unpressurised floatsystem
  • Float without mechanical or magnetic guide rails
  • Fully corrosion resistant system
  • Competitive prices
  • Short delivery times
  • Measurement is unaffected by pressure, vacuum, temperature, foam and viscosity
  • Minimum sensitivity to density variations
  • Permanent indication without external power supply
  • Low temperature version is fitted with ice free indication strip
  • LRS and BV approval for vessels
  • Unique free view indication rail in plastic, Aluminium or full SS 316
  • Fully adjustable switches
  • Scale / ruler available in mm, cm, % or litres
  • Back lighting is unnecessary
  • Eccentric drain cannot blocked by the float
  • Safe, environmentally friendly and maintenance-free construction
  • Broken float indication rail is possible
  • Special designs according to client wishes are possible
  • You are doing business directly with the manufacturer, reducing transfer mistakes
  • For most types all our weldings are fully penetrated.

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