--- product_id: 501992139 title: "Patonu Brake Fluid Liquid Tester,Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 Led Indicators,DOT 3 DOT 4 DOT 5.1 Brake Fluid Liquid Tester Pen for Check Engine Car Accessories" brand: "patonu" price: "79.95 DT" currency: TND in_stock: true reviews_count: 5 category: "Patonu" url: https://www.desertcart.tn/products/501992139-patonu-brake-fluid-liquid-tester-hydraulic-fluid-liquid-oil-moisture store_origin: TN region: Tunisia --- # 1% accuracy in seconds auto power-off after 20s nickel-plated corrosion-resistant probe Patonu Brake Fluid Liquid Tester,Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 Led Indicators,DOT 3 DOT 4 DOT 5.1 Brake Fluid Liquid Tester Pen for Check Engine Car Accessories **Brand:** patonu **Price:** 79.95 DT **Availability:** ✅ In Stock ## Summary > 🚗 Stay ahead of brake failure—test smarter, drive safer! ## Quick Answers - **What is this?** Patonu Brake Fluid Liquid Tester,Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 Led Indicators,DOT 3 DOT 4 DOT 5.1 Brake Fluid Liquid Tester Pen for Check Engine Car Accessories by patonu - **How much does it cost?** 79.95 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/501992139-patonu-brake-fluid-liquid-tester-hydraulic-fluid-liquid-oil-moisture) ## Best For - patonu enthusiasts ## Why This Product - Trusted patonu brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First, Always:** Instantly detect moisture contamination to avoid brake failure and keep your drive smooth and secure. - • **Smart Power Management:** Automatic shutdown after 20 seconds saves battery life so your tester is ready when you are. - • **Universal Compatibility:** Effortlessly test DOT 3, DOT 4, and DOT 5.1 brake fluids—perfect for personal use or professional workshops. - • **Durable & Reliable Build:** Nickel-plated metal probe resists oil and oxidation, ensuring long-lasting performance in any garage. - • **Precision at Your Fingertips:** Get brake fluid moisture levels with 1% accuracy in just seconds—no guesswork, only confidence. ## Overview The Patonu Brake Fluid Liquid Tester is a compact, precision tool designed for quick and accurate detection of moisture in DOT 3, DOT 4, and DOT 5.1 brake fluids. Featuring a corrosion-resistant nickel-plated probe and a skid-resistant matte black case, it delivers results within seconds with 1% accuracy. Its 5-LED indicator system clearly signals fluid condition, while an automatic 20-second power-off function conserves battery life. Ideal for personal and professional use, this tester helps prevent brake system failures by ensuring timely fluid maintenance. ## Description The probe of the brake fluid detector is made of high quality metal to prevent oil and oxidation; The shell is matte black plastic for better skid resistance and excellent overall feel.This product can quickly check the health condition of your car brake fluid, remind you to replace the brake fluid when necessary, so as to avoid traffic accidents, so that you are more comfortable and safer.Suitable for testing DOT3, DOT4, DOT5.1 brake oil performance. The polarization phenomenon in brake fluid test process is greatly reduced by AC pulse test method. The test result is accurate and the measurement speed is fast.The LED indicator will show the percentage of water in the brake fluid in three colors: green, yellow and red. Red indicates brake fluid needs to be replaced immediately, green indicates good condition, and yellow indicates acceptable condition but soon replaced.To save power, remove the battery and clean the detector after the test. This better prevents corrosion and protects the brake fluid tester. Review: Simple to Use Device That Works - Works great. Tested on a small sample first to confirm accuracy. Clean sample tested correctly. Added a relatively small amount of water to the sample and this device instantly recognized the presence of water in the brake fluid. My device says "Battery Tester" so I'm assuming this also works to test for presence of water in car batteries, but I've only tested this with brake fluid. Handy to have and provides peace of mind against water contamination in brake fluid whether the fluid is tested in use or to test a bottle of brake fluid that has previously been opened and stored for awhile. Simple to use, didn't need to reference instructions. This isn't a tool that shouldn't experience damaging contact through normal use, and the construction is sufficient for careful use, but dropping it onto a hard surface may cause fatal damage. Should be okay in a professional environment requiring frequent use, as long as care is taken- it is a measuring instrument after all. Review: Good buy - Works well ## Features - High Quality Performance: The brake fluid detector uses nickel plated metal probe, oil and oxidation resistant, not easy to corrosion. The case is matte black plastic for better skid resistance and good body texture. Metrics are accurate to 1% and results are received within seconds. Help you understand the brake fluid more clearly. - Safe Driving: This product can quickly check the health condition of your car brake fluid and remind you to change the brake fluid when necessary to avoid traffic accidents, so that you are more comfortable and safer. - Easy Operation: Brake fluid detector is easy to use, and small size easy to carry. Press the button, insert the test pen, it only takes a few seconds to know the result through the LED, in order to save power, this test pen has automatic shutdown function. It will automatically turn off the power after 20 seconds each time to save power. - Wide Application Range: can be used in most cars. It is suitable for detecting the moisture content in DOT-3, DOT-4, DOT-5.1 brake fluid. It is very convenient for personal use and widely used in individual workshops, repair shops and dealer workshops. - Service Guarantee: The brake fluid detector requires 1 LR03 AAA 1.5V battery. Our package does not include batteries, please buy batteries at local market. We offer a one-year warranty. If you cannot confirm its compatibility, or have any questions, please feel free to contact us. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BGHX92V1 | | Best Sellers Rank | #76,488 in Automotive ( See Top 100 in Automotive ) #6 in Automotive Brake Fluid Level Sensors | | Brand | Patonu | | Customer Reviews | 4.2 4.2 out of 5 stars (427) | | Date First Available | 22 October 2022 | | Item Weight | 18 g | | Manufacturer | Patonu | | Manufacturer Part Number | Patonu-TST111 | | Manufacturer reference | Patonu-TST111 | | Package Dimensions | 15.19 x 3.4 x 1.9 cm; 18 g | ## Images ![Patonu Brake Fluid Liquid Tester,Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 Led Indicators,DOT 3 DOT 4 DOT 5.1 Brake Fluid Liquid Tester Pen for Check Engine Car Accessories - Image 1](https://m.media-amazon.com/images/I/61v4DKCZ4EL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Simple to Use Device That Works *by H***Y on 5 September 2025* Works great. Tested on a small sample first to confirm accuracy. Clean sample tested correctly. Added a relatively small amount of water to the sample and this device instantly recognized the presence of water in the brake fluid. My device says "Battery Tester" so I'm assuming this also works to test for presence of water in car batteries, but I've only tested this with brake fluid. Handy to have and provides peace of mind against water contamination in brake fluid whether the fluid is tested in use or to test a bottle of brake fluid that has previously been opened and stored for awhile. Simple to use, didn't need to reference instructions. This isn't a tool that shouldn't experience damaging contact through normal use, and the construction is sufficient for careful use, but dropping it onto a hard surface may cause fatal damage. Should be okay in a professional environment requiring frequent use, as long as care is taken- it is a measuring instrument after all. ### ⭐⭐⭐⭐⭐ Good buy *by D***M on 16 June 2025* Works well ### ⭐⭐⭐⭐⭐ Wahl brand delivers *by A***R on 23 November 2023* Nice and compact. It works for grooming. ## Frequently Bought Together - Brake Fluid Liquid Tester,Hydraulic Fluid Liquid Oil Moisture Analyzer with 5 Led Indicators,DOT 3 DOT 4 DOT 5.1 Brake Fluid Liquid Tester Pen for Check Engine Car Accessories - Prestone AS401 DOT 3 Synthetic Brake Fluid - 32 oz. --- ## 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.tn/products/501992139-patonu-brake-fluid-liquid-tester-hydraulic-fluid-liquid-oil-moisture](https://www.desertcart.tn/products/501992139-patonu-brake-fluid-liquid-tester-hydraulic-fluid-liquid-oil-moisture) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-11-10*