About Us

About Circle Systems

At Circle Systems Inc., we are dedicated to delivering high-quality non-destructive testing magnetic particles that meet industry standards and exceed customer expectations. Our ISO 9001-compliant quality management system drives continuous improvement and operational excellence across all processes. We are committed to sustainability by incorporating renewable energy into our operations, minimizing our environmental impact while maintaining exceptional product quality. Through employee engagement, risk management, and strong collaborations with our stakeholders, we ensure reliable performance and customer satisfaction.

View and download our ISO 9001:2015 certificate (PDF)

For over 40 years, Circle Systems has specialized in the development and manufacturing of magnetic inspection particles. Originally founded as Circle Chemical Co., we have been deeply rooted in the chemistry of magnetic particle inspection since our inception. Our commitment to innovation has led to the creation of products that incorporate cutting-edge chemical technologies, best-in-class manufacturing processes, and an extensive, industry-leading product line. Circle Systems has earned a reputation as a trusted supplier to some of the world’s most prominent manufacturers and nondestructive testing companies.

At Circle Systems, we design our products with a strong emphasis on worker safety and environmental stewardship. We have pioneered the development of products designed for use with water-based carriers, providing a safer alternative to petroleum-based solutions in many applications. We have also eliminated harmful propellants from our CircleSafe® aerosol line and introduced bonded dry powder products to minimize airborne dust during inspections. Our commitment to worker and environmental safety is not just a statement—it’s a foundational principle that guides our business practices and product innovations, both now and in the future.

When you do business with Circle Systems, you do business with a company that is defined by its employees. Every employee brings the pride of our success to the job, and this pride is reflected in the quality you will see in our products and our service. Circle Systems is ready to support your operation with the right products, friendly and knowledgeable people, and a service philosophy that puts your needs first.

OUR HISTORY

Developing and Manufacturing Magnetic Inspection Particles for Over 40 Years

  • 1961

    Circle Chemical Co incorporated

  • 1970

    Circle enters NDT industry

  • 1971

    First MPI product sold to US Steel

  • 1980

    Underwater particles debut

  • 1988

    CO2 used as aerosol propellant
  • 1995

    Magnetic stripe cards debut

  • 2009

    Borate free powder wetting agent #34 introduced

  • 2010

    Larger aerosol spray cans

  • 2013

    First high temperature MPI product

  • 2014

    Introduced fluorescent particles for undarkened areas

  • 2016

    Launched latest generation of magnetic particles

  • 2018

    Liquid borate free Mi Glow 783 introduced

  • 2019

    Relocate and expansion to St. Marys Georgia

  • 2019

    Launched black dry method powder

  • 2020

    Expanded warehousing space by 10,000 sq. ft.