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.