An orthotube is a capsule-like high security interlocking door allowing entry to a building or office by one authorised person at a time. Orthotubes are typically used by security and intelligence agencies, such as the Australian Security Intelligence Organisation

Australian Security Intelligence Organisation

The Australian Security Intelligence Organisation is Australia's national security service, which is responsible for the protection of the country and its citizens from espionage, sabotage, acts of foreign interference, politically-motivated violence, attacks on the Australian defence system, and...

 and the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 Security Service

MI5

The Security Service, commonly known as MI5 , is the United Kingdom's internal counter-intelligence and security agency and is part of its core intelligence machinery alongside the Secret Intelligence Service focused on foreign threats, Government Communications Headquarters and the Defence...

 to control access to buildings housing sensitive information

Classified information

Classified information is sensitive information to which access is restricted by law or regulation to particular groups of persons. A formal security clearance is required to handle classified documents or access classified data. The clearance process requires a satisfactory background investigation...

. The devices appear in the BBC

BBC

The British Broadcasting Corporation is a British public service broadcaster. Its headquarters is at Broadcasting House in the City of Westminster, London. It is the largest broadcaster in the world, with about 23,000 staff...

 spy drama Spooks

Spooks

Spooks is a British television drama series that originally aired on BBC One from 13 May 2002 – 23 October 2011, consisting of 10 series. The title is a popular colloquialism for spies, as the series follows the work of a group of MI5 officers based at the service's Thames House headquarters, in a...

, in which they are referred to as pods.

Orthotubes are manufactured by Boon Edam B.V. of the Netherlands

Netherlands

The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

and marketed as Circlelock.

External links

• Boon Edam - Circlelock, the high security interlocking door