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Gemini™ magnetic level indicator

The Gemini  MLI offers innovative level measurement in a special twin-chamber design.  A magnetic float and high-visibility indicator in the primary chamber operate indepently of the Eclipse® Guided Wave Radar transmitter in the secondary chamber.  This use of two differing technologies adds a layer of redundancy similar to the Aurora model.

Gemini's magnetic indicator chamber can be equipped with switches and additional transmitters for expanded capability.  Isolation vales are also easily implemented between both chambers to provided flexibility while fulfilling periodic maintenance procedures.


Guided wave radar

Micropower impulse radar combines time domain reflectometry, equivalent time sampling, and modern low power circuitry. This synthesis of technologies creates a high-speed Guided Wave Radar transmitter. The electromagnetic pulses are propagated via a waveguide that focuses the energy and yields a system many times more efficient than Non-Contact Radar.

Guided wave radar

Magnetic level indicators

Magnetic Level Indicators (MLI) have revolutionized the global visual indication market by offering a safer, reliable, and high-visibility alternative to common gauge glass assemblies.  Utilizing a combination of proven buoyancy principles along with the benefits magnetism, MLIs can be customized to fit virtually any process connection arrangement on the vessel.

The chamber and magnetic float is available in a variety of materials and pressure ratings to accommodate the wide variety of complex process applications present in the world’s major industrial facilities.

Magnetic level indicators


  • Unique dual chamber design
  • Broad range of chamber styles
  • Fabricated non-magnetic chamber
  • ASME and DIN flanges
  • Precision manufactured float
  • Flag or shuttle type indicator


  • Level switches
  • Level transmitters
  • Stainless steel scale
  • Custom scales


Operating principle

Change in the process tank level corresponds to change in the Gemini chamber. The float within the chamber actuates flags or a shuttle for visual indication. The instrument mounted within the second chamber also reacts according to the level change.




Other approvals are available. Consult factory for more details.


Approvals & certificates

ATEX Mechanicals ignition risks certificate MLI

Instruction manuals

Magnetic level indicators I&O manual
Magnetically coupled liquid level indicators, or MLIs, are in widespread use throughout process industries.

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