--- product_id: 427763156 title: "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" brand: "zktool" price: "€ 20.23" currency: EUR in_stock: true reviews_count: 13 category: "Zktool" url: https://www.desertcart.pt/products/427763156-zktool-upgraded-version-automotive-brake-fluid-tester-pen-5-in store_origin: PT region: Portugal --- # 5 LED moisture indicator Auto shut-off saves battery Tests 5 brake fluid types 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 **Brand:** zktool **Price:** € 20.23 **Availability:** ✅ In Stock ## Summary > 💡 Stay ahead of brake failure—test smarter, drive safer! ## Quick Answers - **What is this?** 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 by zktool - **How much does it cost?** € 20.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/427763156-zktool-upgraded-version-automotive-brake-fluid-tester-pen-5-in) ## 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 - • **Compact & Travel-Ready:** Lightweight and pocket-sized, this pen fits effortlessly in your glove box or toolkit for on-the-go diagnostics. - • **Durable & Long-Lasting:** Crafted from corrosion-resistant nylon, designed to withstand tough environments and deliver years of dependable service. - • **Universal Compatibility:** Seamlessly tests DOT3, DOT4, DOT5, ENV4, and ENV6 brake fluids—one tool for every vehicle in your fleet. - • **Rapid & Reliable Readings:** Get accurate moisture levels in seconds, empowering you to avoid costly brake failures before they happen. - • **Precision Moisture Detection:** 5 LED lights instantly reveal brake fluid water content with clear green, yellow, and red alerts for proactive maintenance. ## Overview The ZKTOOL Upgraded Brake Fluid Tester Pen is a compact, 5-in-1 diagnostic tool that quickly measures moisture levels in DOT3, DOT4, DOT5, ENV4, and ENV6 brake fluids using a 5-LED indicator system. Featuring fast, accurate readings, automatic power-off to conserve battery, and a durable nylon shell, it’s an essential device for proactive vehicle maintenance and safety assurance. ## 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. ## Features - 【Function】 The upgrade version brake fluid tester moisture gauge can test the moisture content of DOT3 DOT4 DOT5 ENV6 ENV4 brake fluid extensively. It has faster and more accurate reading capabilities than similar products, while at the same time being more extensive. - 【LED Lights】 The five LED lights indicate the proportion of water in the brake fluid in three colors: green, yellow, and red. Easily figure out the percentage of water in your brake fluid and consider whether to replace it. Please see the specific instructions below. - 【Convenience】 The brake fluid tester tool is simple and convenient. It only takes a few seconds to check the quality of the car's brake fluid. It is a must-have item because it is small and easy to carry. It also automatically shuts down if not used within 12 seconds, saving battery power. (Requires 1 x AAA / 1.5V battery, not included) - 【Quality】 The new Brake Fluid Liquid Tester Pen is the perfect tool to update after many researches on similar products on the market. Read more accurately during the test. At the same time, its shell material is made of high quality nylon compared to ABS material. The product is more corrosion resistant and has a longer service life. - 【Service】 ZKTOOL aims to provide professional and comprehensive auto repair tools and services in the auto repair industry. If you have any questions, please contact us via email. We will provide the best solution. ## 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 ![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 - Image 1](https://m.media-amazon.com/images/I/61kZSGa+nTL.jpg) ![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 - Image 2](https://m.media-amazon.com/images/I/71Tbd3QyToL.jpg) ![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 - Image 3](https://m.media-amazon.com/images/I/71GuxzBx-rL.jpg) ![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 - Image 4](https://m.media-amazon.com/images/I/71UO5nP5D8L.jpg) ![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 - 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 --- ## 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.pt/products/427763156-zktool-upgraded-version-automotive-brake-fluid-tester-pen-5-in](https://www.desertcart.pt/products/427763156-zktool-upgraded-version-automotive-brake-fluid-tester-pen-5-in) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-07-11*