With low-sulphur fuel now the norm, cold corrosion risk rising and port state control focusing on the traceability of main engine condition data, change in liner bore is no longer only a wear indicator: it is a key early warning signal for navigational safety, compliant operation and whole-life cost.
Traditional inspection — lifting the cylinder, using internal micrometers or laser distance measurement — is running into real limits: it takes a long time, accuracy fluctuates, and results depend heavily on operator skill.
The way through begins with one change: not removing the cylinder head.
Dr. E. Horn has introduced the Cylinder Liner Diameter Measurement system (CLDM), designed specifically for two-stroke low-speed diesel engines. It brings high-precision monitoring out of the workshop and into day-to-day operation on board, so measurement can be taken at any time, assessed accurately and reported quickly.
01. Flexible: measurement freed from operational constraints
No cylinder lift and no cylinder head removal are required; full multi-section measurement around the liner is completed through the standard scavenge port. The lightweight, modular design allows one person to complete an initial check of all the liners on a main engine within half a day, and the system suits the different bore sizes of mainstream engine types, ready for use on site.
02. Accurate: proven sensing technology, precision you can trust
At its core is HORN's own high-stability eddy-current sensing technology, validated over years of operation in several thousand bearing monitoring systems worldwide — resistant to oil contamination and high temperature, free from calibration drift, with repeat measurement accuracy of ±10 μm, meeting the strict liner wear assessment requirements of engine builders.
03. Economical: modest investment, visible returns
One-touch intelligent calibration removes tedious set-up. The accompanying Horn analysis software identifies wear trends automatically, compares them against original values and alarm thresholds, and generates a professional PDF report with charts and data tables that meets classification society review requirements. Downtime is significantly shortened, dependence on third-party inspection is reduced, and liner service life is extended — so every measurement becomes a value-adding act of preventive maintenance.
- No cylinder head removal — measure whenever needed
- Eddy-current sensing — rock-solid stability
- Intelligent software support — reports at one touch
This is not simply a measuring instrument. It is a digital chief engineer that understands the ship, the engine and your operation.
The Dr. E. Horn cylinder liner diameter measurement system applies engineering rigour to give crews the choice they can rely on: more efficient maintenance, more confident decisions, and every voyage founded on solid data.
We can propose a measurement package and application guidance tailored to your engine type and maintenance regime, and help you assess the return on investment and practical results. Contact Tecway for product documentation, case references and trial arrangements.
About Tecway
Tecway International Limited was founded in Hong Kong in 1993 and is a leading technical consultant and quality agent for the global maritime industry. Over more than three decades it has built five core business areas: marine equipment, petrochemical storage and transport, diesel and gas engines, marine technical services and maritime consultancy, serving markets across China, Southeast Asia, the Middle East and Europe.
Tecway is committed to the diesel and internal combustion engine sector, supplying products such as the Cylinder Liner Diameter Measurement system (CLDM) together with technical support. Our fast-response service network covers everything from sales consulting and installation through commissioning, training and after-sales service.
We also focus on the low-carbon transition of shipping companies, providing EU ETS and FuelEU compliance consulting, shipping green hydrogen project support, smart-ship dry-docking, export solutions for Chinese-made marine equipment and FGSS services.