---
product_id: 427763156
title: "Universal Brake Fluid Oil Test Pen"
brand: "zktool"
price: "HK$149"
currency: HKD
in_stock: true
reviews_count: 13
category: "Zktool"
url: https://www.desertcart.hk/products/427763156-universal-brake-fluid-oil-test-pen
store_origin: HK
region: Hong Kong
---

# 5 LED moisture indicator Auto power-off in 12s Tests 5 brake fluid types Universal Brake Fluid Oil Test Pen

**Brand:** zktool
**Price:** HK$149
**Availability:** ✅ In Stock

## Summary

> 💡 Stay ahead of brake failure—test smarter, drive safer!

## Quick Answers

- **What is this?** Universal Brake Fluid Oil Test Pen by zktool
- **How much does it cost?** HK$149 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/427763156-universal-brake-fluid-oil-test-pen)

## Best For

- zktool enthusiasts

## Why This Product

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

## Key Features

- • **Durable Build Quality:** High-grade nylon shell resists corrosion, ensuring long-lasting performance on the go.
- • **Compact & Travel-Ready:** Lightweight 50g design fits in your glove box or toolkit—always ready when you are.
- • **Universal Compatibility:** Seamlessly tests DOT3, DOT4, DOT5, ENV4, and ENV6 brake fluids—one pen for all your vehicles.
- • **Rapid & Reliable Readings:** Get accurate moisture levels in seconds, empowering proactive brake maintenance.
- • **Precision Moisture Detection:** 5-color LED system instantly reveals brake fluid water content for safer rides.

## Overview

The ZKTOOL Upgraded Brake Fluid Tester Pen is a compact, 5-in-1 diagnostic tool designed for professional-grade moisture analysis across DOT3, DOT4, DOT5, ENV4, and ENV6 brake fluids. Featuring a 5-LED color-coded indicator, it delivers fast, accurate readings to help prevent brake system failures. Built with a corrosion-resistant nylon shell and auto power-off functionality, this tester combines durability with convenience for every millennial manager who values safety and efficiency on the road.

## Description

Product Description

Review: Great value brake fluid tester - Worked remarkably well
Review: Good value for money. - Very easy to use. Seems accurate too. I tested several cars with differing ages of brake fluid and it clearly indicated correct variations of % value. Good product for the money.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09L6NYDR8 |
| Best Sellers Rank | 3,326 in Automotive ( See Top 100 in Automotive ) 19 in Brake Tools |
| Brand | ZKTOOL |
| Customer Reviews | 4.4 4.4 out of 5 stars (717) |
| Date First Available | 7 Nov. 2021 |
| Item Weight | 50 g |
| Item model number | DOT3 DOT4 DOT5 ENV6 ENV4 |
| Manufacturer | ZKTOOL |
| Manufacturer part number | ZKEU007 |
| Model | DOT3 DOT4 DOT5 ENV6 ENV4 |
| OEM Part Number | DOT3, DOT4, DOT5, ENV4, ENV6 |
| Package Dimensions | 24.9 x 7.8 x 2.4 cm; 50 g |
| Special Features | Universal |

## Images

![Universal Brake Fluid Oil Test Pen - Image 1](https://m.media-amazon.com/images/I/61kZSGa+nTL.jpg)
![Universal Brake Fluid Oil Test Pen - Image 2](https://m.media-amazon.com/images/I/71Tbd3QyToL.jpg)
![Universal Brake Fluid Oil Test Pen - Image 3](https://m.media-amazon.com/images/I/71GuxzBx-rL.jpg)
![Universal Brake Fluid Oil Test Pen - Image 4](https://m.media-amazon.com/images/I/71UO5nP5D8L.jpg)
![Universal Brake Fluid Oil Test Pen - Image 5](https://m.media-amazon.com/images/I/71tH6zNjimL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great value brake fluid tester
*by N***L on 6 March 2026*

Worked remarkably well

### ⭐⭐⭐⭐⭐ Good value for money.
*by B***R on 12 April 2026*

Very easy to use. Seems accurate too. I tested several cars with differing ages of brake fluid and it clearly indicated correct variations of % value. Good product for the money.

### ⭐⭐⭐⭐ A nice little gadget to do tests
*by N***L on 15 November 2024*

I like gadgets & this is a useful tool to check brake fluid, the only problem was there were no batteries in the pack (maybe they didn’t get put in by mistake)

## Frequently Bought Together

- ZKTOOL Upgraded Version Automotive Brake Fluid Tester Pen, 5 in 1 Detector, Can Test DOT3 DOT4 DOT5 ENV6 ENV4, 5 LED, Universal Brake Fluid Oil Detection Pen, Brake Fluid Moisture Analyzer
- Sealey Ak4120 Ethylene Glycol Antifreeze Tester Disc Type
- Sealey AK4122 Propylene Glycol Antifreeze Tester Disc Type

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**Shop now:** [https://www.desertcart.hk/products/427763156-universal-brake-fluid-oil-test-pen](https://www.desertcart.hk/products/427763156-universal-brake-fluid-oil-test-pen)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-06-24*