Mitutoyo 178-390 Replacement Detector for Surface Roughness Tester - SJ-210/SJ-310

The Mitutoyo 178-390 is a precision replacement detector designed for use with SJ-210 and SJ-310 Surface Roughness Tester models, compatible with both standard and retractable drive unit configurations. This high-quality detector enables accurate surface texture measurement in various quality control and inspection applications.

Key Specifications:

• Measuring force: 4mN (millinewtons) for gentle surface contact
• Stylus tip: 90-degree diamond cone with 5-micron radius
• Skidded measuring system for stable reference surface tracking
• Diamond stylus construction ensures long service life and consistent precision
• Direct replacement for worn or damaged detectors on compatible Mitutoyo surface roughness testers

This detector assembly is an essential replacement component for maintaining measurement accuracy in your surface finish testing equipment. The diamond stylus tip provides superior durability and measurement repeatability compared to standard materials, making it ideal for production environments and metrology laboratories.