---
product_id: 15945792
title: "178-390, Standard Detector for Surftest SJ-201 and SJ-301, 6.75\" Inside Depth"
brand: "mitutoyo"
price: "$832.49"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/15945792-178-390-standard-detector-for-surftest-sj-201-and-sj
store_origin: US
region: United States of America
---

# 6.75" depth Precision detection 400mN skid force 178-390, Standard Detector for Surftest SJ-201 and SJ-301, 6.75" Inside Depth

**Brand:** mitutoyo
**Price:** $832.49
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate Your Quality Control Game!

## Quick Answers

- **What is this?** 178-390, Standard Detector for Surftest SJ-201 and SJ-301, 6.75" Inside Depth by mitutoyo
- **How much does it cost?** $832.49 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/15945792-178-390-standard-detector-for-surftest-sj-201-and-sj)

## Best For

- mitutoyo enthusiasts

## Why This Product

- Trusted mitutoyo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Data-Driven Insights:** Empower your machining processes with histogram-based data management for enhanced statistical processing.
- • **Versatile Compatibility:** Seamlessly integrates with Surftest SJ-210 and SJ-301 for a comprehensive quality control solution.
- • **Diverse Detector Options:** Choose from a variety of detector types and head sizes to suit your specific application needs.
- • **Optimal Measuring Forces:** Utilizes built-in skid force of 400mN or less, ensuring minimal impact on your workpiece.
- • **Precision at Your Fingertips:** Experience unparalleled accuracy with a diamond stylus tip designed for meticulous surface roughness detection.

## Overview

The Mitutoyo178-390 Standard Detector is engineered for use with Surftest SJ-210 and SJ-301 surface roughness testers, offering precision detection with a diamond stylus tip. It features a built-in skid force of 400mN or less, ensuring minimal impact on measurements. With a 6.75" inside depth and various detector types available, this tool is essential for effective quality control and statistical processing in machining environments.

## Description

Mitutoyo 178-390, Standard Detector for Surftest SJ-201 and SJ-301, 6.75" Inside Depth

## Features

- Detector used with Surftest SJ-210 and SJ-301 surface roughness testers in shop floor, machining, statistical processing, histogram-based data management, and quality control (QC) applications
- Diamond stylus tip material and radius for precision surface roughness detection
- Built-in skid force of 400mN, or less, and measuring forces such as 4mN (SJ-301), or 0.75mN (SJ-210)
- Comes in a variety of detector types, including standard and deep groove, with varying head sizes
- Connects with Surftest drive unit for operation

## Product Details

- **Brand:** Mitutoyo
- **Color:** silver
- **Batteries Required?:** No
- **Material:** Plastic
- **Power Source:** Corded Electric

## Images

![178-390, Standard Detector for Surftest SJ-201 and SJ-301, 6.75" Inside Depth - Image 1](https://m.media-amazon.com/images/I/61xjYcefZNL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: how deep groove can be measured ?**
A: Hello dear buyer:
Japan Mitutoyo 178-394, the deepest groove can measure 10mm, but 9mm is safer~ Thank you

**Q: does include accesories for take meassures?**
A: NO, ONLY THE  PROBE

**Q: Can I use on the 402?**
A: This probe cannot be used on the 402 and the probe for the 402 is no longer available.

## Frequently Bought Together

- Mitutoyo 178-390, Standard Detector for Surftest SJ-201 and SJ-301, 6.75" Inside Depth
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-01-22*