Sealevel Systems has made industrial I/O and embedded computers in Liberty, SC since 1986; first RS-422/485 PC adapter, ISO 9001:2015 and AS9100D certified.
Sealevel Systems, Inc. has designed and manufactured industrial I/O and embedded computing hardware in Liberty, South Carolina since 1986. The company was founded by Tom O'Hanlan, who observed that hardware built to survive dusty, hot, shock- and vibration-prone textile environments could operate reliably almost anywhere. Sealevel reinvented industrial I/O when it introduced the first RS-422/485 communication adapter for the IBM PC.
Today Sealevel offers over 350 standard products across eight major categories: embedded computers (Relio R1 series including Edge and HPC+ variants, Flexio fanless industrial computers), data acquisition devices (SeaDAC, SeaI/O), Ethernet serial servers (SeaNET), USB products (SeaLINK serial adapters, SeaLATCH locking connectors, SeaISO USB isolators), PCI Express serial and digital I/O cards, PCI cards, tactical communications adapters (MIL-STD-1553, synchronous serial), and industrial IoT hardware.
The 52,000 sq ft Liberty campus houses engineering, manufacturing, and a full SMT production line with automated screen printing, pick-and-place machines, 10-zone convection reflow, and 5-camera AOI. All products are made in the USA. Sealevel serves autonomous and unmanned systems, defense and aerospace, industrial automation and control, public safety, medical, energy, smart cities, and transportation sectors.
Certifications include ISO 9001:2015, AS9100D, RoHS/REACH compliance, IPC-A-610, and J-STD-001. Sealevel is active in PC/104 Consortium, PCI-SIG, PICMG, SOSA Consortium, and Intel Partner Alliance. Products are designed to MIL-STD-810, MIL-STD-461, and related defense standards. The company backs all I/O products with a lifetime warranty and guarantees long-term availability beyond product-line life.
Primary type & automation activities this supplier delivers:
Rugged fanless edge computer with Intel Core i7 for industrial automation, unmanned systems, and edge AI inference.
Ethernet Modbus TCP I/O module with 16 isolated inputs and 16 reed relay outputs for industrial automation and control.
USB DAQ module with 16 isolated inputs and 8 Form C relay outputs for industrial process control and monitoring.
Contact Sealevel Systems, Inc.
WEBSITE
https://www.sealevel.com/PHONE
+1 864 843 4343HEADQUARTERS
United States
Company Facts
Founded
1986
Primary Role
Manufacturer
Company Size
-
Primary Region
North America
Annual Sales
-
Funding Stage
-
Funding Total
-
Certifications & Memberships
Yuanhua Robotics’ AI surgical robots have completed over 5,000 procedures in China, showcasing reliability, clinical trust, and growing adoption in precision surgery.
ByRobotToday Reporter Oct 16, 2025