Caliper (analog) Keltin 0–150 mm measuring tool precision 0.02 mm

Analog caliper Keltin 0–150 mm is a manual measuring tool designed for direct reading of linear dimensions without batteries. The caliper features a 0–150 mm measuring range with a mechanical vernier scale that provides resolution to 0.02 mm, enabling measurement of external, internal and depth dimensions. Its compact metal construction is intended for workshop and field use, offering a practical instrument for component inspection, hobby projects and basic machining or maintenance tasks.

Advantages

The vernier mechanism delivers precise readings without electronic components, ensuring reliable operation in environments where batteries or electronics are impractical. The caliper’s metal body and sliding jaw design provide mechanical durability and stable measurement alignment. A 0–150 mm range covers common small to medium measurement tasks, while the 0.02 mm resolution supports finer checks than coarse rule measurements. The instrument is lightweight and compact for easy storage and transport.

Suitable for (tasks / use cases)

• Measuring external diameters and widths of parts
• Measuring internal diameters such as bores and slots
• Measuring depth of holes and recesses
• Component inspection and quality control in small workshops
• Hobby and DIY projects requiring manual dimensional checks

Key specifications

• Measuring range: 0–150 mm
• Resolution (vernier): 0.02 mm
• Measurement functions: external, internal, depth
• Scale type: mechanical vernier
• Construction: metal sliding frame and jaws

How to use

To measure external dimensions, close the jaws around the object and read the main scale and vernier for the combined value. For internal measurements, insert the smaller jaws into the opening and expand them until they contact the internal faces, then read the value from the scales. For depth measurements, extend the depth rod into the hole or recess while keeping the caliper body perpendicular to the surface, and read the indicated measurement. Always ensure the jaws and scale are clean and free of debris before measuring and perform measurements with light, steady pressure to avoid deformation of the measured part.

Usage recommendations

Store the caliper in a protective case or on a clean surface when not in use, avoid exposure to heavy shock or corrosive environments, and periodically check calibration against a gauge block or reference standard to maintain measurement accuracy.