Award-Winning Engineers at Your Service

Sealevel proudly announces Control Engineering has recognized Jeff Baldwin and Cameron Bolton with 2021 Engineering Leader Under 40 awards. 

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Reliable I/O for Toll & Traffic Management

When a transportation industry leader was awarded a statewide contract for toll collection services, they designated Sealevel for reliable connectivity hardware.

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Rugged SuperSpeed Hubs Have Arrived

Sealevel announces the Rugged SuperSpeed 7-Port USB 3.1 Hub. With an industrial-grade housing, widest-in-industry operating temperature and up to 2400mA downstream power, this hub is redefining rugged. 

Meet the Hub

350+ Critical Communications Solutions in One Box

A Sealevel Blackbox can be an industrial computer, IoT edge device, PCIe or PCI card, Ethernet serial server, USB serial adapter – or any one of our 350+ critical communications solutions.

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Lifetime Warranty.
Longterm Availability.

We offer over 350 core products, available in nearly every configuration imaginable.

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Bring Legacy Systems Forward with IIoT Integration

Together with integrators, Sealevel is revolutionizing the way companies approach industrial IoT adoption to improve efficiencies and realize new revenue streams. 

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Big Picture Thinking

Whether your assets work in the most extreme environments or stay at a desk, we’ve got you covered. Sealevel engineers design computing solutions that excel across industries.


We've exceeded the expectations of
every major US and Allied nations military contractor.
We'll do the same for you.


What’s your flavor?
Oil, gas, electrical, solar, wind?
We’ve got the scoop on energy.

IIoT Integrators

Predictive maintenance.
Efficient operations.
New revenue streams.

Industrial Automation

We didn't invent
industrial automation.
But we might as well have.


How many senses would a sensor sense
if a sensor was powered by Sealevel?
All of them.

Public Safety

Connectivity solutions
where they matter most.
Is fast fast enough?

Smart Cities

Lights. Cars. Cities.
They're all getting smarter.
Shouldn't you?


Ready to go further with your
transportation solutions?
We are.


Pumps. Pipes. Tanks.
Anywhere else you have water,
we can help you control it.

Creative Doers, Serious Business.

Welcome to Sealevel Systems, Inc.

Since 1986, we’ve brought control to the user with our innovative I/O solutions that enable computer connectivity. As our product families expand, responsive thinking and creative development continue to drive our company. From engineering design to production and support, Sealevel ensures client satisfaction with precision-made technology and high-quality services.

Learn About Sealevel

Featured Products

USB to 32 Reed Relay Outputs
PCI Express 2-Port RS-232, RS-422, RS-485 Isolated Serial Interface
Low Profile PCI Express 8 Reed Relay Output / 8 Isolated Input Digital Interface (3-30V)
Low Profile PCI Express 1-Port RS-232 Synchronous Serial Interface (uses Z85230)

Latest News & Insights

July 23, 2021 — Design

HazLoc Certifications & Compliance: Part I

Compliance with hazardous location regulations and standards is necessary to prevent serious accidents in environments including oil rigs, health care facilities and power generation plants.…

July 22, 2021 — News

The Last of the JEDI and the Rise of the JWCC

The Pentagon identified a desire to acquire a “worldwide, highly available, exponentially elastic, secure, resilient cloud computing and storage environment that seamlessly extends from the…