Ultrasonic thickness (UT) measurement of ship tanks and enclosed compartments has long been held back by a fragmented workflow. Surface preparation, probe calibration, couplant application and thickness measurement are handled as separate steps, forcing operators to reposition repeatedly and switch tools throughout the job. This lengthens inspection schedules and introduces data variability. In confined-space environments where access is restricted, the efficiency gap of the traditional approach only widens.
1. A fully integrated workflow — one system, continuous non-destructive inspection
The Scout 137 Gen3 is equipped with a new-generation UTM thickness-measurement payload that consolidates these separate steps into a single, uninterrupted workflow. In field testing, the system completes ten full thickness readings in under two minutes — covering probe calibration, multiple extension and retraction cycles and repeated measurements across several points on a steel plate.
2. Integrated spot-cleaning removes the need for a separate preparation step
A core efficiency advantage of the payload is its built-in spot-cleaning module. Conventional UT inspection requires large areas of the plate to be ground and cleaned in advance. On this system, each measurement point is automatically de-rusted and cleaned of paint locally, immediately before the reading. Cleaning, couplant application and ultrasonic measurement are performed as one continuous action, with no need to return to previously inspected points for secondary preparation.
3. A mechanical design built for tight spaces and long, uninterrupted inspection runs
To handle the complex, narrow steel structures found inside compartments and storage tanks, the UTM payload uses an intelligent release mechanism. Probe extension and retraction movements are kept to a minimum, so the drone can work close to structural members while managing collision risk with accurate, controllable positioning. Combined with tethered continuous power, LiDAR-based autonomous navigation and high-definition visual inspection, the complete system can carry out high-volume thickness measurement over long periods without battery swaps or manual resets, maintaining a continuous inspection state throughout.
Conclusion
By moving from stepwise calibration and separate surface preparation to fully integrated, continuous thickness measurement, the Scout 137 Gen3 closes the loop for ultrasonic inspection in confined spaces. Work that previously required multiple tools and multiple stages can now be completed in a single continuous run, delivering inspection speed, data stability and on-site safety in one package — a highly efficient new solution for non-destructive inspection in enclosed areas of ships, storage tanks and offshore platforms.
If you would like to explore how ScoutDI drone systems can be applied to inspections inside ship cargo tanks, FPSOs, storage tanks and other confined spaces, please contact Tecway. Our team will be glad to provide further product information and technical support.