Modern X-ray systems help embassies and critical facilities to detect dangerous consignments

The security of diplomatic missions does not begin at the security checkpoint. It is often in the mailroom that the decision is made as to whether potentially dangerous consignments are detected at an early stage. For decades, letters and parcels have been recognised as attack vectors targeting embassies, government agencies and other security-critical facilities. In addition to letter and parcel bombs, security officials are now increasingly focusing on chemical substances, narcotics and improvised explosive devices.

Against this backdrop, specialised X-ray systems for mail and parcel screening are becoming increasingly important. They are designed to identify suspicious contents as early as possible whilst ensuring efficient processing of incoming mail. A recent installation in Switzerland illustrates this trend.

Embassies have specific requirements

Diplomatic missions are among the facilities most in need of protection worldwide. Every day, numerous letters and parcels are received, the origin and contents of which are initially unknown. At the same time, postal offices must strike a balance between ensuring operations run as smoothly as possible and meeting high security requirements.

Unlike at airports or large logistics centres, however, space is often limited. There is therefore a need for compact systems that nevertheless enable the reliable detection of a wide variety of threats.

According to 3DX-RAY, an embassy in Switzerland has opted for the AXIS CXi postal X-ray system. It is intended to screen incoming letters and parcels for dangerous or prohibited contents and to further enhance the security of the diplomatic mission.

Colour-coded material detection simplifies assessment

A key difference in modern X-ray systems today no longer lies solely in image resolution. Increasingly, the focus is shifting towards material differentiation.

The AXIS CXi uses a colour display in which different material groups are automatically highlighted. Organic substances – including explosives, narcotics, chemicals and even foodstuffs – appear in orange. Metals such as weapons, knives or metallic components of improvised explosive devices are displayed in blue. Inorganic materials are marked in green. A greyscale mode is also available, designed specifically to aid shape recognition.

This multi-level visualisation can simplify the evaluation process and help to classify suspicious items more quickly. Particularly in postal facilities where staff are not exclusively specially trained X-ray image analysts, colour-coded displays can reduce the training burden and support the assessment process. However, the final assessment remains the responsibility of the operating personnel.

Objectively assessing performance

For operators of security-critical facilities, alongside the technical specifications, the question of the criteria used to assess the performance of an X-ray system is becoming increasingly important.

According to the manufacturer, the AXIS CXi was tested using the British Mail Screening Test Piece (MSTP). This procedure is used to assess image quality and examines, amongst other things, resolution, penetration capability and the detectability of different materials within letter and parcel consignments.

The results can serve as a guide for operators when selecting suitable postal screening systems. At the same time, 3DX-RAY refers to the British specification PAS 97:2021, which sets out recommendations for security measures in postal facilities and the handling of suspicious items. Such guidelines make it clear that technical systems should always form part of a comprehensive security strategy and do not replace organisational measures.

Greater flexibility in mail reception

In addition to image quality, practical usability also plays an important role. Whilst traditional letter X-ray systems are often designed for smaller items, there is a growing need to be able to screen larger parcels or bags using the same equipment.

According to the manufacturer, the AXIS CXi combines a comparatively large inspection chamber with a compact design. This means that, in addition to letters and parcels, bags and hand luggage can also be screened. The mobile system can be deployed at different locations as required and is designed to integrate seamlessly into prestigious buildings without significantly compromising their appearance.

This can be a particularly relevant consideration for embassies or government buildings, where security and visitor-friendliness must be given equal consideration.

Security requirements are rising

The installation in Switzerland highlights a long-term trend. Security measures are increasingly focusing not only on protecting entrances or perimeters, but are also incorporating logistical processes such as incoming mail to a greater extent.

With the growing number of hybrid threats and the ongoing risk to diplomatic facilities, there is a rising need for solutions that can detect suspicious items at an early stage whilst also being integrated into existing workflows. Modern colour X-ray systems expand the possibilities for material analysis and assist operating staff in assessing potential risks.

Conclusion

The decision by yet another embassy to opt for the AXIS CXi demonstrates that the protection of mailrooms remains a central component of holistic security concepts. Modern X-ray systems are no longer limited to the mere display of contours. Through material differentiation, standardised inspection procedures and compact designs, they are evolving into specialised tools for the protection of diplomatic missions, government agencies and other security-critical facilities.

At a glance | AXIS CXi from 3DX-RAY

Areas of application

• Embassies and consulates
• Government agencies
• Government buildings
• Critical infrastructure
• Organisations with heightened security requirements

Key features

• Colour-coded material differentiation
• Greyscale mode for shape recognition
• Large inspection chamber with a compact design
• Mobile version
• Suitable for letters, parcels, bags and hand luggage

Tested in accordance with

• UK Mail Screening Test Piece (MSTP)
• Designed to support mailroom concepts in accordance with PAS 97:2021