Digital Caliper with LCD Display

Measure outside, inside, depth, and step dimensions with one tool

The Digital Caliper with LCD Display is a hardened stainless steel measuring tool built around a linear capacitive sensor, the kind of mechanism that turns a jaw's physical position into a digital readout instead of a line on a scale. It has four measuring modes built into one body: external jaws for outside dimensions, internal jaws for bore and slot widths, a step jaw for measuring ledges, and a depth rod for holes and recesses. Students slide the jaws into place with the thumb roller, lock the position with the screw, and read the result straight off the large LCD screen.

A single button switches the display between millimeters and inches, and the zero function resets the reading at any jaw position, so students can take differential measurements (the difference between two points) without doing the subtraction themselves. At 0.01 mm resolution and accuracy as tight as ±0.02 mm on the shorter ranges, it holds up to real manufacturing-tolerance work, not just classroom demonstrations.

The caliper ships in a durable plastic storage case and runs on one included LR-44 battery. Tightening the lock screw before storage keeps the jaws from drifting and the display from waking up on its own, which is what drains the battery fastest.

Why Teachers Love the Digital Caliper

• Four Measuring Modes in One Tool – External, internal, step, and depth jaws cover most classroom and shop measurement tasks without switching instruments.

• Instant Unit Switching and Zero-Reset – Toggle between mm and inches with one button, and zero the display at any position for quick differential readings.

• Precision to the Hundredth of a Millimeter – 0.01 mm resolution and accuracy down to ±0.02 mm make the readings solid enough to use for real tolerance checks, not just estimates.