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Critical Systems’ Lightning Series (LS) heads feature our patented Super Cooling Technology. The LS heads were designed from the ground up for high amperage applications like copper welding and heavy wall pipe or tube, where a homogeneous single pass weld is preferred. In fact, the weld head body remains cool to the touch even when the cassette and collets reach and exceed temperatures of over 400 degrees Fahrenheit!

At Critical Systems Inc., we don’t just make welding equipment, we make welding better. From our compact CSI Mini Pendant to our breakthrough Red Metal Welding technology, every product is engineered to solve real problems, boost productivity, and deliver consistent, high-quality results. Whether you’re looking to extend equipment life, improve precision, or take on new materials like copper, CSI has the tools to keep you ahead of the curve.

For the first time ever, Critical Systems has developed orbital fusion welding for copper! Red Metal Welding represents a major leap forward in orbital welding technology. From hospitals to HVAC, data centers and plumbing applications, this proprietary process delivers next level precision and reliability.

Critical Systems Inc. is proud to announce our participation in the 2025 United Association’s Instructor Training Program in Ann Arbor,...

Critical Systems, Inc. (CSI) is excited to announce that the groundbreaking Lightning Series (LS) Weld Head is coming to California! The industry’s first and only orbital welding solution is engineered to weld copper using our patented technology. Professionals across welding, engineering, and fabrication can now achieve precise, durable, and repeatable copper welds—delivered with exceptional control and safety. Now’s your chance to try it for yourself!

Critical Systems, Inc. (CSI) is thrilled to announce the official launch of the Lightning Series (LS) Weld Head—the first and only orbital welding equipment capable of welding copper using patented technology. For the first time in the industry, welders, engineers, and fabrication specialists have access to a solution that delivers clean, strong, and consistent copper welds with unmatched ease and safety. And now, you can see it in action.