A portable bomb detection unit has been launched which can reach parts previous scanners have so far been unable to.

Midland-based Image Scan Holdings has spent the last two and half years developing its new TPXi-640 unit.

The company, which employs 18 people, now plans to start production of the unit which was formally launched at the Milipol international security exhibition in Paris.

The TPXi is a portable explosive and ordnance detection (EOD) x-ray piece of equipment which can be used by the military and police.

With additional features such as materials discrimination, normally only associated with large fixed installations such as airport baggage inspection systems, the TPXi units are designed to detect potential threats from explosive, chemical or even biological sources.

While previous scanners were only able to give an image of A4 size, the new device can produce a much larger picture, yet the device is only 5cm thick - allowing it to be slid next to suspect bags left against walls more easily.

Nicholas Fox, chief executive of Image Scan Holdings, said the company had been working hard to miniaturise the components in larger devices.

"Given the terrorism threat is evolving continuously with ever diverse means of attack, undue pressure is being placed on conventional x-ray inspection systems. We believe the future lies in flexible, transportable, high resolution systems that can be used in any physical environment."

Mr Fox added there was a huge market for its scanners, with more than £100 million a year being spent on them in the US, and £250 million worldwide.