Spi VRS2820-0-03 Electronic Drop Indicator 0-4 in

Product Description

The SPI VRS2820-0-03 is an electronic drop indicator designed for high-precision linear measurement in metrology, machining, and inspection applications. It covers a measurement range of 0 to 4 inches with a resolution and accuracy of 0.0001 inches (0.002 mm), making it suitable for demanding tolerance verification work. The unit features an LCD display and a lug-style back mount for secure fixture attachment. Power comes from two included CR2450 batteries. This instrument is typically handled by machinists, quality control technicians, and tool-and-die professionals.

The VRS2820-0-03 fits into surface plate inspection setups, transfer comparator stands, and fixture-mounted measurement rigs where a drop indicator format is required. The lug back allows attachment to standard dovetail and post-style holders commonly found in inspection departments and machine shops. The 0.38-inch stem diameter is compatible with conventional indicator holders and magnetic base clamps used in production and quality environments.

Key Features

• 0 to 4 inch measurement range with 0.0001 inch resolution
• LCD digital display for clear, direct reading
• Accuracy of 0.0001 inches (0.002 mm)
• Lug back mount for secure attachment to standard holders
• 0.38-inch stem diameter fits conventional indicator clamps
• Includes two CR2450 batteries — ready to use out of the box

Compatibility

Designed for use with standard dovetail and lug-back indicator holders; the 0.38-inch stem diameter is compatible with conventional magnetic base and post-style clamp holders used in inspection and machining setups.

Installation Notes

Mount the indicator securely in a lug-back holder before use; verify the clamp is fully tightened to prevent movement during measurement. Zero the indicator against a known reference surface before taking readings. Handle the instrument carefully to avoid shock or drop damage, which can affect calibration. Battery replacement requires a CR2450 coin cell — power down the unit before servicing the battery compartment.