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Jerguson Gage

Magnetic Liquid Level Gage - The Magnicator II


Reliability is in the physics.  A uniquely strong north magnetic field activates flags, switches and transmitters with a certainty not found elsewhere because only the Magnicator II has a magnet arrangement this powerful, and this focused.

If you are looking for reliable performance from a magnetic level indicator, start with the float magnet.  The stronger and more focused the magnetic field of the float, the more reliable the level indicator .. and the more reliable the function of the magnetically actuated flag indicators, switches and transmitters.

HOW IT WORKS: The Jerguson Magnicator II float has the strongest magnetic field of any magnetic level indicator. Its patented design (U.S. Patent 5,743,137) uses two 360º annular Alnico 8 ring magnets with opposing north poles.

The Magnicator II gage is connected to a process vessel.  The chamber, or "column", contains a sealed float with a permanent magnet assembly which rises and falls as the liquid level changes in the process vessel.

The indicator housing is parallel to the gage column but completely isolated from process liquid.  Indicator flags are rotated by the float magnet assembly as it moves up and down in the chamber.

Magnetic liquid level gages are an attractive alternative to sight glasses for many applications.  They provide improved visibility, reduced maintenance and eliminate the leak paths associated with sealing glass.


The Schedule 40 Chamber, when installed, will fill through the process connections to a level equal to that of the vessel on which it is mounted. The chamber may be constructed from any of a number of non-magnetic materials and fitted with a variety of process connections.

The Stainless Steel Float, located within the chamber, is specially engineered to a precise size and weight (based on the specific gravity of the process fluid) to provide an accurate level reading. Inside the float, a patent-pending dual-ring magnet assembly generates a strong uniform magnetic current.

The hermetically sealed Flag Indicator, externally mounted to the chamber, contains a series of bi-colored flags, each with an integral magnet, that flip when acted upon by the magnetic force generated by the magnet assembly in the float. Similarly, the hermetically sealed.

Bob Indicator consists of a glass tube containing a lightweight "puck" that is magnetically coupled to the field generated by the float. In either case, as the float responds to changes in the liquid level, the indicator will simultaneously do likewise, thereby providing a precise liquid level measurement.