Mission Critical Communications

Sealevel has worked with OEMs and contractors to design and develop a broad range of critical communications products for complex and demanding applications. As military, government, and commercial needs evolve, Sealevel delivers advanced, reliable and interoperable critical and enterprise communications systems.

Flexible Mission Critical
Communications Solutions

Over the past 35 years, Sealevel has developed and manufactured serial communications, digital I/O, and rugged computing products that are trusted by every major U.S. and Allied nations military contractors. Modern mission critical communications require lightweight and compact systems. Timely decision making requires critical communications solutions to quickly deliver data from field locations. 

Sealevel has worked with the top provider of 911 call systems, fire department pump suppliers, and countless other public safety equipment leaders to develop solutions that enable critical communication.

Digital & Analog I/O

Sealevel offers digital and analog I/O products and data acquisition devices with optically isolated inputs, Reed and Form C relay outputs, TTL interfaces to solid-state relays, and A/D and D/A functionality. Our I/O solutions support configurations from a few inputs to an entire communications network.

Serial I/O

SeaLINK USB adapters allow you to quickly communicate with RS-232, RS-422 and RS-485 peripherals. SeaLINK USB serial adapters use a state-machine architecture that reduces host processor overhead for faster, more reliable communications, with the largest selection of USB serial adapters available.

Rugged Embedded Computers

Designed for I/O-intensive applications, our industrial computerstouch panel PCs and COM Express solutions offer unmatched computing power combined with versatile configurability for critical communications, requiring no fans or other rotating parts.

Sealevel Expertise

Sealevel has more than 35 years of experience and over 350 standard products for military, government, and commercial customers. Our in-house team engineering and manufacturing team has direct experience designing and producing hardware, and software, to support military, governmental, and commercial mission critical communications solutions.

Embedded Computing

Built for harsh, mission critical environments, our Computer on Module (COM) based systems provide the benefits of a full custom design while reducing time, costs and risk. Our rugged systems require no fans or other rotating parts. Your OS and application software run from solid-state disk, eliminating rotating hard drives and resulting in true solid-state operation. Our products are designed to meet many commercial and military standards for rugged computing.

Digital & Analog I/O

Monitor and control real-world signals with any computer using Sealevel digital and analog I/O products. Select from field-proven optically isolated in puts, Reed and Form C relay outputs, TTL interfaces to solid-state relays, A/D and D/A functionality. Our digital and analog I/O products come in a wide variety of host connections: host via wireless, Ethernet, USB, RS-485 or RS-232.

Serial I/O

All Sealevel synchronous serial products are engineered with strict attention to timing to achieve the most reliable, high-speed communication possible. Choose from a variety of RS-232/422/485 multi-interface products that support HDLC/SDLC and other protocols.




Our SeaConnect industrial IoT devices offer a variety of digital, analog and sensor I/O options coupled with SeaCloud’s built-in event engine to trigger actions. SeaCloud and SeaConnect combine into a robust IoT platform that allows you to monitor, track, analyze, and rapidly react to changing conditions.


Talk to Our Solutions Engineers

We are proud to work with the most talented engineers from around the world to solve difficult problems in diverse environments. No matter your application requirements, Sealevel can provide a solution that perfectly fits your needs.

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