Fowler 54-520-250-0 Electronic Drop Indicator 0-1 in

Product Description

The FOWLER 54-520-250-0 is a digital electronic drop indicator designed for precise linear measurement in inspection, machining, and quality control applications. It covers a measurement range of 0 to 1 inch (0 to 25.00 mm) with a resolution of 0.0005 inch (0.0100 mm), making it suitable for high-accuracy surface comparison and runout checks. The lug back mounting style allows secure attachment to indicator holders and magnetic bases. The solid carbide contact point resists wear during repeated contact cycles. Machinists, toolmakers, and quality technicians are the primary users of this instrument.

The 54-520-250-0 is used in machine shops, production floors, and inspection rooms wherever a drop-style indicator is needed for vertical measurement setups. The digital display eliminates parallax reading error common with analog dials. It is part of the Fowler Indi-X Blue Electronic Indicator X Series, which is designed for environments where quick, reliable readout and metric/inch switching are required. Typical applications include surface plate inspection, fixture setup, and spindle runout measurement.

Key Features

• Digital display with 0.0005 inch (0.0100 mm) resolution for high-accuracy readings
• Dual-unit readout in both inch and metric (mm) modes
• Solid carbide tipped contact point for extended wear life
• Lug back mounting for compatibility with standard indicator holders and bases
• 3/8 inch (0.3750 inch) stem diameter fits common dovetail and stem clamp holders
• Powered by CR2032 battery for convenient field replacement

Compatibility

Designed for use with standard indicator holders and magnetic bases that accept a 3/8 inch stem diameter. Part of the Fowler Indi-X Blue Electronic Indicator X Series.

Installation Notes

Secure the lug back or stem into a compatible indicator holder or magnetic base before use. Ensure the contact point is perpendicular to the measurement surface to avoid cosine error in readings. Handle the stem and contact point carefully to prevent damage to the precision spindle mechanism. Replace the CR2032 battery when the low-battery indicator appears on the display.