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Sealevel Systems

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Sealevel Systems, Inc.
Company typePrivate
IndustryHardware & software
Founded1986
HeadquartersLiberty, South Carolina, United States
Key peopleTom O’Hanlan, Founder, CEO
ProductsComputing/HMI, serial boards, I/O boards
Net incomeNot Reported
Websitewww.sealevel.com

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

References

  1. "Company Overview of Sealevel Systems, Inc". Bloomberg Businessweek. Archived from the original on July 12, 2009. Retrieved May 29, 2014.
  2. ^ Control Engineering, Staff. "Data Risk for RS-485 Users?". Control Engineering. Retrieved May 1, 2008.
  3. Salami, Joe (April 16, 1991). Gain Control Over COM3 and 4 with COMM+232. PC Magazine. p. 41.{{cite book}}: CS1 maint: location missing publisher (link)
  4. "Spec Sheet". PC/104 Consortium. Retrieved May 29, 2014.
  5. "United States Patent: O'Hanlan". United States Patent & Trademark Office. November 18, 1997.
  6. Munro, Jenny (February 17, 2002). "Firm's products working around the world – and above it, too". Greenville News.
  7. Tom O'Hanlan; Jon Titus (August 30, 2004). Digital I/O Handbook. Sealevel Systems. ISBN 0975999400.
  8. Senior Technical Editor. "Multi-interface serial board is RoHS-compliant". EE Times. Retrieved November 22, 2005. {{cite web}}: |last= has generic name (help)
  9. "PDA 184 to radio interface USB cable systems". FedBizOpps.gov. Retrieved September 5, 2008.
  10. Dick, Hughes (February 12, 2010). "Ready for What's Next". Watchdog Journal.
  11. Keller, John. "Navy to buy serial adapters from Sealevel Systems for AN/PRC battlefield radio systems". Military & Aerospace Electronics. Retrieved May 12, 2013.
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