Starrett 49505 Electronic Drop Indicator 1 Inch

Product Description

The STARRETT 49505 is an electronic drop indicator designed for precision dimensional measurement in shop, field, and maintenance applications. It features an LCD display with a 1-inch maximum measurement range and an accuracy of 0.0001 inches, making it suitable for close-tolerance inspection work. The flat back design allows it to seat flush against surfaces or fixture plates without shimming. It runs on two included CR2032 lithium batteries and reads in both inch and metric units. Machinists, tool-and-die technicians, and maintenance professionals use this indicator where digital readout and repeatability are required.

This indicator suits setups where a low-profile, flat-back mounting is needed on a magnetic base, surface plate, or custom fixture. Its dual-unit display lets technicians switch between inch and metric readings without recalibration. Typical applications include runout checks, part comparison, fixture alignment, and surface flatness verification in manufacturing and maintenance environments. The 8 mm stem diameter fits standard indicator holders and dovetail mounts.

Key Features

• 1-inch measurement range with 0.0001-inch accuracy
• LCD display for clear, direct digital readout
• Reads in both inch and metric units
• Flat back included for flush fixture and plate mounting
• 8 mm stem diameter fits standard indicator holders
• Powered by two included CR2032 3V lithium batteries

Compatibility

Designed as a direct-mount electronic drop indicator compatible with standard 8 mm stem indicator holders, dovetail clamps, and magnetic base fixtures used in precision measurement setups.

Installation Notes

Install the indicator by clamping the 8 mm stem securely in the holder without overtightening, which can distort the stem and affect accuracy. Ensure the contact point is perpendicular to the measured surface before zeroing the display. Keep the indicator away from coolant, excessive vibration, and magnetic fields that may interfere with the LCD or battery contacts. Battery replacement requires a small flat blade tool to open the battery compartment.