EF/MEF By-Pass Magnetic Level Gauge

EF/MEF Series are by-pass level transmitter product lines, more commonly know as magnetic level gauge devices that can be equipped for local visual indication only or with level switches and an electronic level transmitter output.  The magnetic level gauge units include their own self-contained chamber that would be mounted to the vessel, typically via side connections at the top and bottom areas of the EF/MEF by-pass chamber.  The EF is standard size and MEF is a smaller “mini” version.  These magnetic level gauge units are safer than glass gauges that they typically replace.

Product Description

The EF/MEF series are magnetic level gauge product lines capable of providing local visual indication, level switch activation and a continuous level transmitter output, all from a single device.  They are by-pass style level transmitter devices typically mounted on the side of a vessel. The EF/MEF magnetic level gauge devices use the principles of buoyancy and magnetism. A float with a magnet inside resides in the by-pass chamber.  The chamber is attached to the vessel.  The liquid level inside the chamber seeks the vessel liquid level.  The float inside the chamber rises and falls as the liquid level inside the tank does the same.  Visual indicators, level switches and magnetically activated level transducers can be attached to the magnetic level gauge by-pass chamber and are all activated by the magnet inside the float as it rises and falls in the chamber.  The EF chamber has a typical ID of 2.36″ (60mm) and the MEF mini unit has a typical chamber ID of 1.18″ (30mm).  These magnetic level gauge units are safer than glass level gauges that they replace.

  • Standard (EF) and mini (MEF) sizes for a wide variety of ranges up to 19ft (5.8m)
  • Safer than glass gauges
  • Maximum operating temperature up to 752⁰F (400⁰C)
  • Visual indication, switches and level transducer choices for standard and high accuracy
  • Marine certified
  • Minimum C-C distance is 5.9″ (150mm), maximum is 19ft (5.8m)
  • Wetted materials include polypropylene, 304SS and 316SS
  • Blanket, jacketed and heated chamber versions available
  • Maximum operating temperature up to 752⁰F (400⁰C)
  • Maximum operating pressure to 1,450psi (100bar)
  • Minimum density of 0.51 S.G.
  • Flag display colors Red/White or Green/White
  • SPST (N.O. or N.C.) and SPDT switch output; 1A@240VAC/200VDC
  • English and Metric rulers available with custom made scales
  • FG or EG series level measurement transducers; magnetic float or magnetostrictive technologies respectively
  • Marine certifications; DNV, ABS, Bureau Veritas, Germanischer Llyod and Llyod’s Register


  • Replace glass gauge with safer magnetic level gauge technology
  • Visual indication only (like glass gauge)
  • Equip with single or multiple level switches and level transducer
  • Tank level indication and control where internal obstructions do not allow invasive technologies


  • Petrochemical
  • Power
  • Wastewater
  • Boiler areas
  • Many others

EF Series sales Catalog

MEF Series Sales Catalog

EF Series Operation Manual

EG Magnetostrictive Level Transducer and EF Calibration Manual

Full Line Products Guide

Product Solutions for Bulk Solids Industries

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