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Introduction of Magnetic Level Indicator

Introduction of Magnetic Level Indicator

2022-02-09

Magnetic Level Indicators 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.


Demands for increased safety and improved efficiency in processing facilities have made the magnetic level indicator an indispensable level control device. With the ability to perform reliably under extreme process conditions and offer redundant technology for safety-critical applications, magnetic level indicators, can make a smart alternative for a wide range of level measurement and control needs. 

Principle of Operation


The working principle behind a magnetic level indicator is that the measuring instrument shares the same fluid — and therefore, the same level — as the vessel. The level indicator is attached to the vessel and connects directly with the fluid to be measured.As the fluid level rises or falls, so does the float.


Utilizing a combination of proven buoyancy principles along with the benefits magnetism, magnetic level indicators manufacturers can provide liquid level information. They can activate a switch or provide continuous level data via a transmitter. Unlike a sight glass, magnetic coupling allows to measure liquid levels without direct contact between the externally mounted visual indicator and the fluid in the vessel.


A magnetic level indicator is mounted in-line with its respective process vessel.  It is exposed to the process media inside the vessel along with the process pressure and temperature. A float containing an array of magnets is sealed inside the chamber. The float’s magnetic field interacts with the flags located in the visual indicator securely mounted on the outside of the chamber. As liquid rises and falls, the float follows the changing level with the magnets remaining in the same plane as the liquid surface. The magnetic field causes the visual indicator flags to rotate, thereby revealing the liquid level.


The magnets within a float and an indicator are magnetically coupled. The float, located inside the chamber, dynamically tracks the surface of the liquid as it rises and falls. The magnet assembly inside the float generates a magnetic field that penetrates through the chamber wall to couple with the visual indicator.


For more info contact us directly or download our Kaidi Technology brochure below.


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