Mitutoyo 543-302B-10 Electronic Drop Indicator

Product Description

The MITUTOYO 543-302B-10 is a battery-powered electronic drop indicator designed for precision dimensional measurement in industrial and metrology applications. It features a measuring range of 0 to 12.70 mm, an accuracy of 0.003 mm, and a resolution of 0.0001 inch or 0.0005 inch. The flat back housing and straight connection type make it straightforward to mount on a magnetic base or indicator stand. A 59.40 mm dial face provides a clear digital readout, reducing read error during repetitive inspection tasks. The unit ships with an SR44 silver oxide battery included and meets ANSI and AGD Group 2 standards.

This indicator is suited for use in quality control, machine setup, and surface comparison work in manufacturing, toolroom, and inspection environments. It is typically used by machinists, metrologists, and precision measurement technicians who need repeatable, high-resolution readings when checking runout, parallelism, flatness, or part-to-part variation. The straight connection type is compatible with standard indicator holders and snug-fit collet systems common on granite surface plates and milling machine setups.

Key Features

• Measuring range: 0 to 12.70 mm (0 to 0.5000 inch)
• Accuracy: 0.003 mm for reliable inspection results
• Dual resolution: 0.0001 inch and 0.0005 inch selectable
• Flat back housing with straight connection for standard mounting
• 59.40 mm dial diameter for easy reading at arm's length
• Battery-powered with SR44 silver oxide battery included
• Meets ANSI and AGD Group 2 standards

Compatibility

Designed as an OEM-style electronic drop indicator compatible with standard AGD Group 2 mounting setups and indicator holders that accept a straight connection type.

Installation Notes

Installation is performed by machinists or metrology technicians using a standard indicator holder, collet clamp, or magnetic base stand. Ensure the contact point is positioned perpendicular to the measured surface to avoid cosine error. Power down any machine spindle or moving fixture before securing the indicator in position. Handle the steel contact point carefully to avoid impact damage, which can affect calibration.