Sealevel Systems, Inc.

Sealevel Systems, Inc. advanced the industrial I/O and embedded computing industry with the first RS-422/485 communication adapter for the IBM PC. Since 1986, Sealevel has continued to redefine design, engineering, and manufacturing for industrial computers, carrier boards, Ethernet serial servers and adapters, and robust firmware. All Sealevel products are engineered and manufactured at our ISO 9001:2015 registered headquarters in Liberty, South Carolina with a quality and availability promise to outlast your application.

Sealevel products offer unmatched reliability, backed up by our lifetime warranty on I/O products and our commitment to long-term availability. We offer over 350 standard products, available in nearly every configuration imaginable. If you need a custom product our award-winning team of engineers can provide a solution that perfectly fits your needs.