Sealevel Systems, Inc. is a privately held manufacturer headquartered in Liberty,

South Carolina )''Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = " Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = ...

, which develops computer circuit I/O boards.

Company overview

Sealevel Systems was founded by Tom O’Hanlan and his wife Susan, in 1986. In 1991 the company released a dual port serial card that allowed users to set its I/O addresses to any two COM ports. In 1994, Sealevel developed the RS-485 auto-enabled circuit. The circuit eliminated the need to control the RS-485 transceiver-enable signal via software and removed the risk of communications error due to bus communications. In 1997, O’Hanlan was granted a patent for a communication device that transmitted asynchronous formatted data synchronously. The company produced the communications card used for positioning the Space Shuttle's robotic arm in 2002. Tom O’Hanlan and technical author Jon Titus co-authored a book, ''The Digital I/O Handbook'', in 2004. In 2005, Sealevel Systems released the industry's first RoHS-compliant serial I/O board. In 2008, Sealevel won a defense contract for a USB/serial port cable with a heavily encased circuit board. The cable allows soldiers in the field to link laptops to AN/PRC-117F Multiband Manpack Radio (MBMMR) tactical radios, manufactured by any company, and transmit data, including

GPS The Global Positioning System (GPS), originally Navstar GPS, is a Radionavigation-satellite service, satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of t ...

maps, images, coordinates and IM-type communications via radio signal instead of by satellite. It took seven years for the company to perfect the technology. In 2013 the company was awarded a sole-source contract for Naval Air Systems Command for this cable.{{cite web, last=Keller, first=John, title=Navy to buy serial adapters from Sealevel Systems for AN/PRC battlefield radio systems, url=http://www.militaryaerospace.com/articles/2013/05/Sealevel-radio-adapters.html, publisher=Military & Aerospace Electronics, accessdate=May 12, 2013

References

Companies based in South Carolina Manufacturing companies based in South Carolina Companies established in 1986 Software companies based in South Carolina Software companies of the United States Computer companies of the United States Computer hardware companies