Holistic Approach to Predictive Maintenance


Augmented Analytics platform and Service 4.0 solution for Real-Time Monitoring, Condition-Based and Predictive Maintenance of X-Ray Systems.

Our AI and ML-powered solution comprises real-time asset health monitoring, an early-warning system for sending autonomous alert notifications to service specialists, and provision of remote resolution management with recommended actions in response to failures.

PM4X (former PMT4NIIS) gives you the ability to proactively make informed decisions to:


Optimise the






Guarantee high
availability of
X-ray systems

PM4X LPR Models

PM4X transforms the traditional reactive maintenance approach into a new proactive data-driven one. PM4X features three key models:

Predictive Models

Estimate the probability of failure, enabling service specialists to assess and identify the risk of failure and take appropriate action to reduce or even prevent downtime of the X-Ray System.

Condition-based Models

Analyse the data received from DanlexBox in real time to identify changes or deviations from the normal mode of operation.

Survival Models

Estimate the remaining useful life of key X-Ray System components, optimising inventory management.


Connecting an X-Ray System* to our PM4X solution is as simple as connecting our proprietary DanlexBox to the X-Ray unit’s Ethernet port. DanlexBox is a cutting-edge IIoT device that:

Collects, processes, and consolidates data from the X-Ray Systems

Offers the flexibility to adapt to specific customer requirements

Monitors a wide range of additional physical parameters

Meets the highest cybersecurity and data protection standards

* For X-Ray Systems connected to an Intranet, an alternative option is to use an on-site server.

Monitoring and Alert Notification

The PM4X BI Dashboard is a monitoring platform that brings the processed data from DanlexBox and the results of the PM4X models together, thus providing valuable insights to the service specialist, including:

Historical data overview to identify patterns in the deterioration of the X-Ray System

Real-time values of the system’s key performance indicators

Real-time status of the technical health of the X-Ray Systems

Real-time results from the Condition-based and Predictive models

Automatic Alert Notification system

IT and Cybersecurity, Data Protection and Integrity

The PM4X Smart Data Infrastructure is located at our headquarters in Sofia, Bulgaria. Danlex is ISO-certified and operates according to ISO/IEC 27001 (Information Security Management System), ISO/IEC 20000-1 (IT Service Management System), and ISO 9001.

The PM4X Smart Data Infrastructure complies with the applicable standards and meets the highest security requirements to protect the infrastructure and the metadata from unattended access and to flag any unusual activity on our network.

Experienced Support

With over 27 years of hands-on experience in servicing X-Ray Systems, we have built up an extensive Knowledge Base, which provides a powerful tool in assisting the decision-making process during resolution management.

Our service specialists are available to provide 24/7 hotline support and assistance with any faults or malfunctions related to the X-Ray Systems or with interpretation of data and results displayed on the BI Dashboard.


In a highly competitive evaluation process by an international panel of independent experts under the Horizon 2020’s SME instrument phase 2, the PM4X was scored as a high-quality project proposal and awarded with the “Seal of Excellence” certificate delivered by the European Commission.

The development of new condition-based and predictive models for the latest Smiths Detection technologies and systems is currently being implemented under project No BG-RRP-2.006-0015 “Predictive Maintenance Tool for Non-Intrusive Inspection Systems (PMT4NIIS)” granted by the National Recovery and Resilience Plan of the Republic of Bulgaria.