APG MPE Series Magnetostrictive Level Sensor

The MPE Series Magnetostrictive Level Sensor is a continuous level measurement sensor based on proven magnetostrictive technology. The sensor is comprised of a float, containing a permanent magnet, a stainless steel stem, containing a wire waveguide, and an electronics housing. The wire waveguide is made of a ferromagnetic material, which has the unique property of temporarily changing shape in the presence of a magnetic field. As the float travels up and down the stem, its magnet affects the wire waveguide directly beneath. When an electrical pulse is transmitted through the waveguide, the resulting magnetic field interacts with the magnetic field generated by the float. The result is a torsion vibration that travels rapidly through the waveguide. This torsion vibration is detected by the MPE's microprocessor controlled electronics, which precisely measures the location of the float based on the time elapsed between the transmission of the current pulse and the resulting torsion vibration.

Applications

The MPE series sensors provide a highly accurate and repeatable level readings in a wide variety of liquid level measurement applications. The MPE is a good choice for many applications where temperature, conductivity, pressure, or chemical vapors might cause problems for other level sensing technologies. With a range of mounting options and floats to choose from, the MPE can be configured to fit a wide range of applications. An optional temperature sensor inside the stem can also provide temperature readings inside the liquid media.