---
product_id: 54118717
title: "Duoyi DY23 Automotive Brake Fluid Tester Digital Brake Fluid Inspection"
brand: "duoyi"
price: "FREE"
currency: USD
in_stock: false
reviews_count: 1
url: https://www.desertcart.us/products/54118717-duoyi-dy23-automotive-brake-fluid-tester-digital-brake-fluid-inspection
store_origin: US
region: United States of America
---

# Duoyi DY23 Automotive Brake Fluid Tester Digital Brake Fluid Inspection

**Brand:** duoyi
**Price:** FREE
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Duoyi DY23 Automotive Brake Fluid Tester Digital Brake Fluid Inspection by duoyi
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/54118717-duoyi-dy23-automotive-brake-fluid-tester-digital-brake-fluid-inspection)

## Best For

- duoyi enthusiasts

## Why This Product

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

## Description

Operation Manual: 1. Install one 9V(6F22) battery at the back of tester. 2. After inserting the battery, press POWER button to turn on the tester, all LEDs lights turn on with buzzer sounding, which indicates the product self-test is successful. 3. Press SELECT button, it will locate DOT3 model automatically. 4. Each time you push the SELECT button, it will recycle from DOT3 to DOT4 to DOT5.1 with the indicator LEDs. 5. Immerse the probe into brake fluid and you will get different colors of LED lights, they indicate:  Green Light: indicates the brake fluid water content is below 1% The First Yellow Light: indicates the brake fluid water content is approximately 1.5% The Second Yellow Light: indicates the brake fluid water content is approximately 2.5% The First Red Light: indicates the brake fluid water content is approximately 3% The Second Red Light: indicates the brake fluid water content is more than 4% 6. Press POWER button to turn off the tester. Note: 1. After use, please clean up the residual stains on the probe that might affect the test. 2. If in use for a long time, you'd better remove all batteries and store in a dry place at a normal room temperature. Item Height:5 inch Voltage:12Model Name:DY23 Item Width:5 inch Hardware Version:Latest Software Version:Latest Electronic: Yes External Testing Certification: CE Item Length: 25 inch Item Type: Electrical Testers & Test Leads Material Type: PlasticItem Weight:0.5 kg Package Includes: 1pc x Duoyi DY23 Automotive Brake Fluid Tester Digital Brake Fluid Inspection 1pc manual

## Features

- Note:
- 1. After use, please clean up the residual stains on the probe that might affect the test.
- 2. If in use for a long time, you'd better remove all batteries and store in a dry place at a normal room temperature.
- ›See more product details

## Images

![Duoyi DY23 Automotive Brake Fluid Tester Digital Brake Fluid Inspection - Image 1](https://images-na.ssl-images-amazon.com/images/I/41ap1gMdZ5L.jpg)
![Duoyi DY23 Automotive Brake Fluid Tester Digital Brake Fluid Inspection - Image 2](https://images-na.ssl-images-amazon.com/images/I/41k8P6pBGFL.jpg)
![Duoyi DY23 Automotive Brake Fluid Tester Digital Brake Fluid Inspection - Image 3](https://images-na.ssl-images-amazon.com/images/I/41rR6FcSGBL.jpg)
![Duoyi DY23 Automotive Brake Fluid Tester Digital Brake Fluid Inspection - Image 4](https://images-na.ssl-images-amazon.com/images/I/31lUcAT1kdL.jpg)
![Duoyi DY23 Automotive Brake Fluid Tester Digital Brake Fluid Inspection - Image 5](https://images-na.ssl-images-amazon.com/images/I/41lfL4Rv5aL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    It's Worth Waiting For....
  

*by M***I on Reviewed in the United States on March 23, 2018*

As a former MBZ Shop owner, I wanted a Solid HD Tester for cking the B.Fluid in my Vehicles and eventhough it was about a Months Wait, it was well worth it, This is a Well Built, Excellent Tester, the only thing it is really missing is a Case, but it works great

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-20*