---
product_id: 15945792
title: "Mitutoyo 178-390, Standard Detector for Surftest SJ-201 and SJ-301"
brand: "mitutoyo"
price: "$796.01"
currency: USD
in_stock: true
reviews_count: 2
category: "Mitutoyo"
url: https://www.desertcart.us/products/15945792-mitutoyo-178-390-standard-detector-for-surftest-sj-201-sj
store_origin: US
region: United States of America
---

# Diamond-tipped stylus for ultra-precise detection 6.75" adjustable inside depth for versatile measurements Low-force measurement protects delicate surfaces Mitutoyo 178-390, Standard Detector for Surftest SJ-201 and SJ-301

**Brand:** mitutoyo
**Price:** $796.01
**Availability:** ✅ In Stock

## Summary

> 💎 Measure with confidence, lead with precision.

## Quick Answers

- **What is this?** Mitutoyo 178-390, Standard Detector for Surftest SJ-201 and SJ-301 by mitutoyo
- **How much does it cost?** $796.01 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-mitutoyo-178-390-standard-detector-for-surftest-sj-201-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

- • **Robust Industrial Grade:** IP54-rated design built to withstand shop-floor environments, combining durability with high performance.
- • **Versatile Compatibility:** Seamlessly integrates with Mitutoyo Surftest SJ-210 & SJ-301 models, empowering your quality control workflow.
- • **Precision Diamond Stylus:** Experience unmatched accuracy with a controlled-radius diamond tip that guarantees repeatable surface roughness readings.
- • **Trusted Industry Standard:** Join thousands of professionals across aerospace, automotive, and medical sectors who rely on Mitutoyo’s legacy of precision.
- • **Delicate Surface Protection:** Low measuring force (as low as 0.75 mN) ensures your sensitive materials stay pristine while delivering reliable data.

## Overview

The Mitutoyo 178-390 Standard Detector is a precision surface roughness measurement tool designed for Surftest SJ-210 and SJ-301 models. Featuring a diamond-tipped stylus and low-force measurement technology, it delivers highly accurate, repeatable results while protecting delicate surfaces. With a 6.75-inch adjustable inside depth and IP54 industrial protection, it’s engineered for demanding machining and quality control environments across multiple industries.

## Description

Mitutoyo 178-390, Standard Detector for Surftest SJ-201 and SJ-301 | Dedicated to the standard/retractable drive unit, for SJ-210 and SJ-310 Surface Roughness Testers, 90 degree angle: Construction Rulers: desertcart.com: Industrial & Scientific

Review: Works great - We need this device for surface measurement. This is exactly what I was looking for and it works great. Thanks.
Review: Five Stars - Works as expected

## Features

- COMPATIBLE WITH SURFTEST MODELS: Designed for use with Mitutoyo Surftest SJ-210 and SJ-301 surface roughness testers in machining, shop-floor inspection, histogram-based data management, statistical analysis, and QC environments.
- DIAMOND STYLUS FOR HIGH ACCURACY: Equipped with a precision diamond-tipped stylus with a controlled radius to ensure reliable, repeatable surface roughness detection across a wide range of materials.
- LOW, CONTROLLED MEASURING FORCE: Features a built-in skid force of 400 mN or less, with measuring forces of 4 mN (SJ-301) or 0.75 mN (SJ-210), protecting delicate surfaces while maintaining measurement integrity.
- STANDARD DETECTOR DESIGN: Offered as part of a family of detector types, including standard and deep-groove versions, with varying head sizes to match diverse surface-measurement applications.
- A LEGACY OF QUALITY: Our ultra-precise measurement solutions bring improved performance to countless industries, including aerospace, medical, automotive and energy. With more than 5,500 products the largest product portfolio of any commercial metrology provider we have the solutions you need to meet today's metrological challenges and customer expectations.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001OBYZ6O |
| Best Sellers Rank | #117,054 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Surface Roughness Gauges |
| Brand | Mitutoyo |
| Brand Name | Mitutoyo |
| Color | silver |
| Customer Reviews | 5.0 out of 5 stars 9 Reviews |
| Display Type | digital |
| Extended Length | 6.75 inches |
| Global Trade Identification Number | 04946368041087 |
| International Protection Rating | IP54 |
| Item Highlight | Dedicated to the standard/retractable drive unit, for SJ-210 and SJ-310 Surface Roughness Testers, 90 degree angle |
| Item Weight | 4 ounces |
| Manufacturer | Mitutoyo |
| Manufacturer Part Number | 178-390 |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | 178-390 |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Recommended Uses For Product | machining, shop floor inspection, histogram-based data management, statistical analysis, quality control, surface roughness measurement |
| UPC | 603908263234 |
| Unit Count | 1 Count |

## Product Details

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

## Images

![Mitutoyo 178-390, Standard Detector for Surftest SJ-201 and SJ-301 - Image 1](https://m.media-amazon.com/images/I/5102qGa62AL.jpg)
![Mitutoyo 178-390, Standard Detector for Surftest SJ-201 and SJ-301 - Image 2](https://m.media-amazon.com/images/I/31s4irFDW5L.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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by T***E on June 24, 2013*

We need this device for surface measurement. This is exactly what I was looking for and it works great. Thanks.

### ⭐⭐⭐⭐⭐ Five Stars
*by J***S on February 8, 2017*

Works as expected

## Frequently Bought Together

- Mitutoyo 178-390, Standard Detector for Surftest SJ-201 and SJ-301, 6.75" Inside Depth
- Mitutoyo 513-403-10E DIAL TI, BAS, STD 0.008", 0.00004" Accuracy, 0.0001", White
- Noga DG61003 Regular Duty Dial Gage Holder Mag Base w/Metal Fine Adjust

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/15945792-mitutoyo-178-390-standard-detector-for-surftest-sj-201-sj](https://www.desertcart.us/products/15945792-mitutoyo-178-390-standard-detector-for-surftest-sj-201-sj)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-05*