About us


ESTABLISHED IN 1976 – Milhous Company is a designer and manufacturer of magnet systems for a product line of electromagnetic fluid filtration systems and high energy physics applications for industry, research and medical communities. From prototype to production, our design and analysis capabilities allow Milhous to assist our diverse customer base seeking a source for resistive or superconducting electrical coils or magnet systems.

THE BALLMATRIX™ – After being the primary manufacture of an Electromagnetic Filter (EMF) for Babcock & Wilcox and Areva for over three decades, Milhous Company purchased the technology from Areva in 2008. Shortly thereafter, the EMF was renamed BallMatrix Electromagnetic Fluid Filtration System. The mature technology of the BallMatrix has been used predominately in the large boiler industry filtering magnetite out of condensate. Although, its superior efficiency to remove magnetically susceptible particles from any fluid has recently attracted the attention of other industries such as automobile manufacturing, gas and oil refining and precious metals recovery.


Established in 1976, Milhous Company is home to the BallMatrix Electromagnetic Fluid Filtration System and provides services for design and manufacture of resistive and superconducting coils and electromagnets for high energy physics applications. Our experience is extensive from over 40 years of excellent service to our long list of diverse customers. Below is snapshot of our history:

  • 1976
    Milhous Company established in Amherst Virginia USA
  • 1984
    Main contractor for manufacturing electromagnetic fluid filters for Babcox & Wilcox.
  • 1991
    Started fabricating resistive accelerator coils and magnets for the new electron beam accelerator facility that became Jefferson Lab.
  • 1995
    Became coil and magnet vendor for Argonne National Lab, Oak Ridge National Lab and Loa Alamos National Lab.
  • 1997
    Produced Sextupole Magnets for Upgrade to Loma Linda University Medical Center Proton Therapy Center – Introduction to medical commercial use.
  • 2004
    Manufactured superconducting septum saddle coils for BWXT.
  • 2005
    Produced main solenoid coils for Sandia National Labs Coil Gun project.
  • 2006
    Designed and produced 100 HP and 6000 HP permanent magnet prototype motors for US Navy.
  • 2008
    Purchased Electromagnet Fluid Filter business from Areva (formally Babcox & Wilcox) and rebranded to BallMatrix® Electromagnetic Filtration System.
  • 2015
    Develop methods and prototype for first ever Nb3Sn superconducting flutter coils for AS&T.
  • 2017
    ISO 9001 certified in July.


Lawrence Livermore National Laboratory
Baker Hughesd
Los Alams
Loma Linda University
Twin Rivers
OAK Ridge
International Paper
B & W
Carter Holt Harvey
Virginia Tech
University Virginia
Daresbury Laboratory
Jafferson Lab