--- product_id: 135329793 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: "S$0" currency: SGD in_stock: false reviews_count: 13 url: https://www.desertcart.sg/products/135329793-brake-fluid-tester-pen-hydraulic-fluid-liquid-oil-moisture-analyzer store_origin: SG region: Singapore --- # 6.6 x 1.5 x 1.5 in Size 1.5V Power 1.58 oz Weight 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:** S$0 **Availability:** ❌ Out of Stock ## Summary > 🚗 Drive with Confidence: Your Brake Fluid's Best Friend! ## 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?** S$0 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/135329793-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 - • **Safety First!:** Ensure your brake fluid is in top shape for safer drives. - • **User-Friendly!:** Designed for beginners, check fluid quality in seconds. - • **Instant Readings!:** 5 LED indicators for quick moisture level checks. - • **Compact & Durable!:** Lightweight design with a robust ABS shell. - • **Smart Power Saver!:** Auto shut-off feature to conserve battery life. ## Overview The eOUTIL Brake Fluid Tester Pen is a compact and durable tool designed to analyze the moisture content in DOT3, DOT4, and DOT5 brake fluids. With five LED indicators for easy reading, this user-friendly device ensures your vehicle's brake system is safe and reliable. Its lightweight design and automatic shut-off feature make it a must-have for every car owner. ## Description Buy 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: Brake Fluid Level - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Already saved me money on expensive brake repairs - It just works as described. You put a AAA battery in it and push the end like a pen, which turns it on with a green led. Insert it into your brake fluid reservoir and it gives you a reading by the color coded LED lights on the side. I like this one because it works with different brake fluids dot3,4, etc. They may all do that but wanted to be sure before buying and this one had it in the description. I have used it on two vehicles so far and it works great! I found that I needed to change the fluid in one of my cars which probably saved me a lot of money already, because the fluid can retain water and start to deteriorate your brake lines and parts. This tester does seem to be a high quality piece of equipment like something an actual mechanic would use often Review: Great Product - Works exactly as described! Great value for the price. My only complaint is I had a hard time opening the battery door and it feels like it might break one day, but for how often I will be using this product its great and works perfectly. ## 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 | |---------------|-------| | ASIN | B07QZ2LD1T | | Best Sellers Rank | #1,302,565 in Automotive ( See Top 100 in Automotive ) #87 in Automotive Replacement Brake Fluid Level Sensors | | Brand | eOUTIL | | Customer Reviews | 4.2 4.2 out of 5 stars (908) | | Date First Available | April 24, 2019 | | Item Weight | 1.58 ounces | | Item model number | BFT034BL300-LW-ca03 | | Manufacturer | eOUTIL | | Manufacturer Part Number | BFT034BL300-LW-ca03 | | Package Dimensions | 6.6 x 1.5 x 1.5 inches | | Voltage | 1.5 Volts | ## 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) ## Questions & Answers **Q: Does it work for DOT 5 ?** A: dot 5 is silicone based & dot 5.1 will hold moisture. this product detects moisture content **Q: What is the difference between this model for $8.91 and the $6.99 model, bft034bl300-lw-03?** A: can't tell you the difference , only that the one I bought fell apart . **Q: Does the brake fluid tester work with Dot 3 and 4 fluid?** A: According to the listing for the item, it does. I only used mine on DOT 3 so I don't know for sure. My guess would be that the only one it wouldn't work on is DOT 5/SIlicone brake fluid **Q: Does it check power steering fluid or antifreeze coolsnt** A: It Only check brake fluid ## Customer Reviews ### ⭐⭐⭐⭐⭐ Already saved me money on expensive brake repairs *by J***J on July 25, 2019* It just works as described. You put a AAA battery in it and push the end like a pen, which turns it on with a green led. Insert it into your brake fluid reservoir and it gives you a reading by the color coded LED lights on the side. I like this one because it works with different brake fluids dot3,4, etc. They may all do that but wanted to be sure before buying and this one had it in the description. I have used it on two vehicles so far and it works great! I found that I needed to change the fluid in one of my cars which probably saved me a lot of money already, because the fluid can retain water and start to deteriorate your brake lines and parts. This tester does seem to be a high quality piece of equipment like something an actual mechanic would use often ### ⭐⭐⭐⭐⭐ Great Product *by M***D on February 4, 2021* Works exactly as described! Great value for the price. My only complaint is I had a hard time opening the battery door and it feels like it might break one day, but for how often I will be using this product its great and works perfectly. ### ⭐⭐⭐⭐ Brake Fluid Tester *by J***I on November 13, 2022* Brake fluid tested works as intended. It is not complicated, and as soon as you dip the probes to the brake fluid you got the ready. It does not record the reading, and unfortunately it works fine, and there is no need to get an expensive one, especially if you have one or two cars to test. ## 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.sg/products/135329793-brake-fluid-tester-pen-hydraulic-fluid-liquid-oil-moisture-analyzer](https://www.desertcart.sg/products/135329793-brake-fluid-tester-pen-hydraulic-fluid-liquid-oil-moisture-analyzer) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-16*