Caliper Mitutoyo 300 mm digital ABS Absolute, IP67, 1.5V battery, model 500-708-20

The Mitutoyo 300 mm digital caliper model 500-708-20 is a precision measuring instrument designed for internal, external and depth measurements with an ABS Absolute linear encoder. The caliper features a 300 mm measuring range, an easy-to-read digital display and IP67 protection for dust and water resistance. Powered by a 1.5 V battery, it is intended for workshop use, inspection tasks and quality control where robust, repeatable digital measurement readouts are required.

Advantages

This digital caliper provides stable, repeatable readings thanks to the ABS Absolute system, which eliminates the need for origin setting after battery changes. Its IP67 rated case and sliding components resist dust and temporary immersion in water, reducing the risk of damage in challenging environments. The clear digital display and simple control layout support fast measurements for internal, external and depth tasks, while the compact construction allows comfortable handling during routine inspection work.

Suitable for

• Workshop and machine shop dimensional checks
• Quality control and incoming inspection of components
• Measurement of shafts, bores, gaps and depths up to 300 mm
• Environments where dust and occasional water exposure occur

When it may not be suitable

This caliper is intended for general precision work up to 300 mm; it may not be suitable for measurements requiring ranges beyond 300 mm or for ultra-high-precision laboratory calibration where gauge blocks and specialized comparators are required. Very high-speed production lines that need contactless or non-contact measurement systems would require different equipment.

Key specifications

• Measuring range: 0–300 mm
• Measurement functions: external, internal and depth measurement
• Measurement system: absolute encoder technology
• Protection rating: dust and water resistance to IP67
• Power supply: single 1.5 V battery
• Display: digital readout for direct measurement values

How to use

Before measuring, verify the caliper is clean and the sliding faces are free from debris. Insert a 1.5 V battery if needed; the ABS Absolute system retains the origin so no recalibration is required after battery replacement. For external measurements, close the jaws on the workpiece and read the value from the digital display. For internal measurements, use the smaller jaws and open them until they contact the bore walls. For depth measurement, use the depth rod by extending it into the measured cavity. Apply consistent, light measuring force and ensure jaws are aligned with the feature being measured for accurate results.

What to consider before purchase

• Required measuring range (this model measures up to 300 mm)
• Required environmental protection—IP67 resists dust and temporary immersion
• Desired measurement functions: external, internal and depth
• Battery type and replacement availability (1.5 V)

Usage recommendations

Store the caliper in a dry, dust-free case when not in use, wipe sliding surfaces with a soft cloth, avoid applying excessive force to the jaws, and replace the battery with the specified 1.5 V cell to maintain reliable measurements. Periodic calibration checks are recommended for quality control environments.