Surveillance company increasing U.S. footprint.

As threats from terrorist organizations continue in the homeland and around the globe, one company believes that sales of surveillance equipment to help thwart potential attacks will flourish.

"It's a growing market," said Mark Patrick, chief technology officer at Digital Barriers, a surveillance and security company based in the United Kingdom.

The company--which works with countries around the world--expanded its footprint in the United States after it purchased a Virginia-based company called Brimtek earlier this year, he said.

"We see significant expansion within the U.S. market," he said. The acquisition has "allowed us to service a much more increased demand."

Much of the company's technology can be used to counter asymmetric threats posed by lone wolf attackers or plots concocted by terror group cells, Patrick said.

"What we're able to do is give an early warning and allow the appropriate response for that," he said. "We're also able to provide surveillance technology that allows our security teams here and abroad to be able to perform more effective surveillance on what unfortunately is a growing number of people that you need to watch."

The company offers a wide range of technologies, including a camera that can tell if someone in an airport or train station is carrying items such as guns, money, drugs or powders, he said. The system--called Thru Vis--can see through layers of clothes but can't see anatomical details of a person. It can be used as a complementary system to the scanners often found at airports around the world, he said.

The system can also be combined with the company's face recognition software, he said. Users can create a list of certain...