Real-Time Crack Monitoring on a High-Risk Bridge in Greece

With seamless installation and reliable wireless monitoring, engineers receive real-time data on critical cracks, empowering informed decision-making for restoration efforts.


In 2023, the Servia High Bridge in Greece was closed to traffic due to stability concerns and the risk of a possible collapse.  

Neotek Case Study Servia Bridge Crack 1

Experts were concerned about visible cracks on the bridge, which appeared to be widening. At nearly 1.4 kilometres, the 48-year-old bridge is one of the longest in Greece, spanning the Polyfytos, an artificial lake on the Aliakmonas River.  

In 2020, safety concerns about the bridge’s structural integrity were raised, and traffic restrictions were implemented. But earlier this year, more drastic measures were taken. In March, the bridge was closed. 

Following the shutdown, urgent restoration work began. As part of the project, the cracks were monitored to assess their behaviour during and after the structural rehabilitation.  

The Greek firm NEOTEK supplied six Elastisense displacement sensors to be installed over major cracks. They needed a reliable wireless solution to provide a 24/7 data stream to the engineers monitoring the restoration progress. 


NEOTEK chose the Ackcio Beam system for the reliability and stability of its wireless solution, which provides real-time readings without the obstruction of cables on the work site. 

Neotek Case Study Servia Bridge Nodes 1

Another key consideration in choosing Ackcio was its ease of installation. Due to the urgency of the project’s monitoring needs, the installation had to be done by workers on the site. Under NEOTEK’s guidance, the successful installation of the sensors, Ackcio Analogue Nodes and Ackcio Gateway took just a couple of hours. Following installation, the system’s operation and configuration were confirmed via telemetry. 

​​Once the Ackcio Beam system was installed, it began providing the engineers with valuable data. Remote monitoring of displacement, strain, and temperature enabled NEOTEK to detect even minute changes in real time to inform remedial actions when needed. And Ackcio’s remote access allows NEOTEK to configure the system from 450 kilometres away.

Looking ahead, Ackcio Beam will be a seamless fit if more monitoring parameters, such as tilt, load and deformation, are added to the system. 

Neotek Case Study Servia Bridge Gw 1


  • Reliable, real-time readings
  • Easy installation 
  • Wireless solution eliminates cable
  • Remote sensor configuration 


  • Ongoing data access
  • Reliable, stable readings from an active worksite 
  • Increased infrastructure safety
  • Improved risk management


Choosing Ackcio for wireless monitoring was an easy decision. The engineers needed to monitor 24/7 without the obstruction of cables. The installation was a pleasure, and we can configure the system from 450 km away! The monitoring engineers are very happy with the seamless monitoring and are considering expanding the Ackcio system to monitor more parameters.

– Katerina Xystri, Sales Director from NEOTEK

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