--- product_id: 292390807 title: "Brake Fluid Tester Pen, Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid" brand: "eoutil" price: "€ 40.57" currency: EUR in_stock: true reviews_count: 3 url: https://www.desertcart.hr/products/292390807-brake-fluid-tester-pen-hydraulic-fluid-liquid-oil-moisture-analyzer store_origin: HR region: Croatia --- # 5-level moisture detection Auto power-off in 15s Compact pen-sized design Brake Fluid Tester Pen, Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid **Brand:** eoutil **Price:** € 40.57 **Availability:** ✅ In Stock ## Summary > 💧 Drive Safer, Test Smarter: Your Pocket-Sized Brake Fluid Guardian ## Quick Answers - **What is this?** Brake Fluid Tester Pen, Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid by eoutil - **How much does it cost?** € 40.57 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/292390807-brake-fluid-tester-pen-hydraulic-fluid-liquid-oil-moisture-analyzer) ## Best For - eoutil enthusiasts ## Why This Product - Trusted eoutil brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Auto Shutoff:** Saves battery life by powering down automatically after 15 seconds of inactivity. - • **Ultra-Portable & Durable:** Carry your brake fluid tester anywhere with its sleek, rugged ABS shell. - • **5 LED Precision Indicators:** Visualize water content clearly with green, yellow, and red alerts—even in low light. - • **Instant Brake Fluid Health Check:** Get real-time moisture readings in seconds to ensure safer drives. - • **User-Friendly for All Skill Levels:** No mechanic needed—easy operation makes maintenance effortless. ## Overview The eOUTIL Brake Fluid Tester Pen is a compact, durable diagnostic tool designed to measure moisture levels in DOT3, DOT4, and DOT5 brake fluids. Featuring 5 LED indicators for precise water content detection and an automatic power-off function, it offers quick, easy, and reliable brake fluid health checks to enhance vehicle safety. ## Description Full description not available ## Features - SAFE&USEFUL---The unit is Mini Pen Liquid Moisture Water Tester Tool. Check the health status of DOT3, DOT4, DOT5 car brake fluid, it will be safer for your driving. - 5 LED INDICATORS---5 LED to indicate percentage of water in the brake fluid with three colors green yellow and red. Even in the dark does not affect reading, make reading data easier. - EASY TO USE---The brake fluid tester is easy to use. Check the quality of brake fluid in car only takes seconds. Make it easier to operate for beginner. It's a must-have car tool for your car owners. - PORTABLE&DURABLE---Brake fluid tester pen is small compact size, easy to carry. Super strong ABS shell, has long service life. - AUTO TURN OFF---In order to save power, this test pen has the automatic shutdown function, it will automatically turn off the power 15 seconds after starting every time. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | eOUTIL | | Brand | eOUTIL | | Package Dimensions | 16.76 x 3.81 x 3.81 cm; 45 g | | Item model number | BFT034BL300-LW-ca03 | | Manufacturer part number | BFT034BL300-LW-ca03 | | Voltage | 1.5 Volts | | Item Weight | 45 g | ## Images ![Brake Fluid Tester Pen, Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid - Image 1](https://m.media-amazon.com/images/I/51Lvrzs5hZL.jpg) ![Brake Fluid Tester Pen, Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid - Image 2](https://m.media-amazon.com/images/I/71h-nbP82RL.jpg) ![Brake Fluid Tester Pen, Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid - Image 3](https://m.media-amazon.com/images/I/61YQ20QM75L.jpg) ![Brake Fluid Tester Pen, Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid - Image 4](https://m.media-amazon.com/images/I/61l95GiIXAL.jpg) ![Brake Fluid Tester Pen, Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid - Image 5](https://m.media-amazon.com/images/I/61nqz-QFZgL.jpg) ## Available Options This product comes in different **Colour Name** options. ## Questions & Answers **Q: Can it do power steering?** A: I doubt it will be as accurate as some of the brake fluid testers say they can only do one or two fluid types so the type of fluid presumably changes the parameters that you are able to measure. I have never heard of steering fluid being a problem other than leaking. I have certainly never had a problem with any moisture in a system in my 45 years of playing with cars. Others may have better advice on this. ## Customer Reviews ### ⭐⭐⭐⭐ 4.0 out of 5 stars A simple but effective check *by M***T on Reviewed in the United Kingdom on 6 February 2023* Very easy to use and a good peace of mind tool. Could save a very large amount of money that would be required if left unchecked. ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars I have tested on clean ad contaminated fluid and gives expected result *by D***N on Reviewed in the United Kingdom on 15 December 2022* Small portable easy to use ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Easy to use *by M***W on Reviewed in the United Kingdom on 9 November 2021* Well made and so easy to use. It put my mind at rest that my breaking system is safe. Very good value for the money. ## Frequently Bought Together - eOUTIL Brake Fluid Tester Pen, Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 LED Indicators, Auto Brake Diagnostic Testing Tool for DOT3 DOT4 Brake Fluid - GODESON 88702 Smart Color Coded Tire Tread Depth Gauge --- ## 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.hr/products/292390807-brake-fluid-tester-pen-hydraulic-fluid-liquid-oil-moisture-analyzer](https://www.desertcart.hr/products/292390807-brake-fluid-tester-pen-hydraulic-fluid-liquid-oil-moisture-analyzer) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-21*