A magnetic level gauge indicator is an externally mounted chamber with visual indicators that are completely isolated from the process liquid. Inside the chamber is a magnetic float that rises and falls with the level gauge of the liquid. When the float moves, it causes flags inside the chamber to turn and mark the level gauge on an exterior indicator numbered roughly like a meter stick. Magnetic gauges are often used in conjunction with through-air or guided wave radar as a redundant level gauge measurement.
Magnetic level gauge transmitters were initially introduced as alternatives to sight glasses. Over time, glasses become compromised through leaking seals, clouding, and breakage; level gauge technology is not susceptible to these weaknesses.
What are the advantages of using a magnetic level gauge transmitter?
The chief benefit of using a level gauge is isolation from process liquid. Separation allows for easy access to the level gauge for cleaning and eliminates contact with difficult media. Magnetic level gauge indicators are commonly low-cost in comparison with other level technologies, and can provide visual indication of level gauge from a distance. In fact, magnetic gauges make level gauge visible from up to 200 feet away.
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