OKOndt OKOSCAN 73HS Rail Testing System

OKOndt OKOSCAN 73HS Rail Testing System


The OKOndt OKOSCAN 73HS System is designed for automated high-speed testing of rails in service. This ultrasonic rail inspection equipment detects all types of critical defects: transverse, longitudinal and horizontal cracks, cracks from bolt holes, etc. This system can ensure testing at speeds up to 40 km/hr. (25 miles/hr.) with test results displayed in the form of A- and B-Scans. Features 4 wheel-type ultrasonic probe units, couplant supply system, specialized software and rugged batteries that supply 8 hours of continuous use. 


Trolley (Carriage)

The testing trolley assures the positioning and movement of the wheel probes. Electric drives mounted onto the trolley automatically adjust the trolley to the track width. It is an auxiliary mechanism that centers the wheel probes along the rail axis.


Key Features

  • Capability to test curves with a radius of less than 200m (660 ft). At a lower testing speed - of no less than 120m (393 ft)
  • Automatic width adjustment to the gauge type
  • Easy to maintain
  • Capability to control the suspension system (cant)

Wheel Probes

The ultrasonic rail testing system incorporates four (4) wheel probes. Each probe includes:

  • Three 70-degree transducers, 2 MHz
  • One 45-degree transducer, 2 MHz
  • One 40-degree transducer, 2 MHz (Side looking)
  • One 0-degree transducer, 4 MHz
  • Two 58-degree transducers, 2 MHz (Side looking)

Flaws Detected


70° Probes


45° Probes



0° Probes


40° Side Looking Probes


58° x 34° Probes



Ultrasonic Modules

The OKOndt OKOSCAN 73HS System utilizes OKO-24 single-channel ultrasonic modules with a frequency range from 1 to 7 MHz and initial pulse sending frequency of up to 4kHz.

The 73HS structure envisages two positioning options of the ultrasonic modules:

  1. Directly on the trolley. This positioning option provides better protection against interference, wheel probe connection cables to the ultrasonic module have a shorter length, data from the module to the PC are transferred through the Ethernet cable.
  2. In the vehicle. This variant of positioning releases from an additional load and decreases the trolley weight, ultrasonic modules are protected from external climatic conditions impact.

Specialized Software

The OKOndt OKOSCAN 73HS high-speed rail flaw detector is supplied with pre-installed software. The software is composed of:

  1. SW for the channel parameters setup
  2. SW for testing, review, and analysis of the test results


Wheel Probe Positioning (left), Example of Testing Mode Display (right)

Additional Features

Couplant Supply System

The system consists of the tank, program-controlled pump, check valves and regulating valves. At movement, the couplant is automatically supplied under the ultrasonic wheels, meanwhile the water flaw is automatically adjusted depending on the speed of movement.

System Power Supply

Power supply of all the system’s equipment is ensured by the rugged batteries, with the capacity for continuous operation of the system for 8 hours.

Positioning System

Positioning system consists of an Encoder and a GPS module. The Encoder precisely determines the travelled distance and binds the received testing data and the set position marks to the travel coordinate. The GPS module ensures continuous recording of the cart’s geographic coordinates, as well as coordinates of the detected flaws.

Kit Includes

  • Flaw Detection Trolley
  • 4 Wheel Type Probes
  • OKO-24 Ultrasonic Modules (24 pcs minimum)
  • Couplant Supply System
  • Positioning System
  • Video Surveillance System (CCTV)
  • Encoder
  • PC with Specialized Software

For more information, please contact us

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