In cylinder liner inspection, the accuracy and efficiency of diameter data bear directly on the continued sound running and service life of the engine. This article looks in detail at a device designed specifically for measuring cylinder liner diameters, and at how its key parameters simplify the work and raise accuracy.
a. CLDM measuring device

- Power supply: 24 VDC (from 6 lithium-ion cells)
- Accuracy: < 10 μm
- Battery capacity: > 10 hours (rechargeable)
- Operating temperature: +40…+60 °C
- Storage temperature: -25…+85 °C
- Relative humidity: < 90 % (non-condensing)
- Protection class: IP65
- Connection: USB Type-C (data exchange)
b. EV330000 operating handle

- Power supply: 8 VDC (from 2 lithium-ion cells)
- Battery capacity: > 10 hours (rechargeable)
- Operating temperature: 15…+60 °C
- Storage temperature: 0…+80 °C
- Relative humidity: < 90 % (non-condensing)
- Protection class: IP65
- Connection: USB Type-C (data exchange); 4-core screened cable with connector (infrared transmitter); 2-core cable with connector (draw-wire displacement sensor)
c. FRG00100 infrared transmitter

- Power supply: 3.3 VDC (from the operating handle)
- Operating temperature: 40…+60 °C
- Storage temperature: -25…+85 °C
- Relative humidity: < 90 % (non-condensing)
- Protection class: IP65
- Connection: 4-core screened cable with connector (operating handle)
d. SZS20505 CLDM draw-wire sensor

- Power supply: 3.3 VDC (from the operating handle)
- Maximum sensor length: 5000 mm
- Operating temperature: 40…+60 °C
- Storage temperature: -25…+85 °C
- Relative humidity: < 90 % (non-condensing)
- Protection class: IP65
- Connection: 2-core cable with connector (to the operating handle)
e. ZUG07XXX calibration tool

The calibration tool is used to verify the calibration carried out at the factory. Placing the device in the calibration tool allows its accuracy to be checked.
f. ZUG070001 diameter positioning aid

The diameter positioning aid guides the installation of the measuring device on the piston for fast, accurate positioning. The tool is adapted to the actual scavenge port design of the liner concerned.
g. FA046555 charger

- Power supply (AC): 100-240 V, 50/60 Hz, 1.0 A
- Power supply (DC): 12 VDC, 3 A
- Power consumption: < 36 W
- Polarity protection: Yes
- Operating temperature: 0…+40 °C
- Storage temperature: 0…+40 °C
- Relative humidity: < 85 % (non-condensing)
Behind these key parameters lies a clear understanding of what users need: accuracy, broad applicability and freedom from maintenance effort. This diameter measuring device is built around those three objectives, packaging complex measurement logic into a simple, reliable tool. If you are looking for an efficient, accurate and maintenance-free solution for bore inspection, it is worth examining its technical detail more closely.
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.

