{"product_id":"habotest-ht5009-digital-brake-fluid-tester-dot3-dot4-dot5-1-flexible-probe","title":"HABOTEST HT5009 Digital Brake Fluid Tester DOT3\/DOT4\/DOT5.1","description":"\u003cp\u003eKeep your vehicle's braking system performing at its best with the \u003cstrong\u003eHABOTEST HT5009 Digital Brake Fluid Tester\u003c\/strong\u003e. This portable, professional-grade tool measures moisture content in DOT3, DOT4, and DOT5.1 brake fluids with high precision — giving you instant, accurate readings so you know exactly when a fluid change is due. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Monitor Your Brake Fluid?\u003c\/h2\u003e\n\u003cp\u003eBrake fluid is hygroscopic — it naturally absorbs moisture over time. Excess moisture lowers the fluid's boiling point, which can reduce braking effectiveness under heavy use. The HT5009 detects moisture levels from 0% to 4% with ±0.3% accuracy, helping you stay ahead of maintenance before it becomes a costly issue.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Sensitivity Flexible Probe:\u003c\/strong\u003e A flexible metal hose lets you easily access tight reservoir openings without spills or mess.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Fluid Compatibility:\u003c\/strong\u003e Tests DOT3, DOT4, and DOT5.1 brake fluids — covers the vast majority of passenger and light commercial vehicles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3-Color Backlit LCD Display:\u003c\/strong\u003e At-a-glance color-coded status (good \/ check \/ replace) makes interpreting results fast and straightforward.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAudio-Visual Alarm:\u003c\/strong\u003e Built-in buzzer and light alert notify you when moisture levels exceed safe thresholds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Flashlight:\u003c\/strong\u003e Illuminates dark engine bays for convenient under-hood use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eData Hold Function:\u003c\/strong\u003e Freezes the reading on screen so you can note the result without keeping the probe submerged.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCalibratable:\u003c\/strong\u003e Field-calibration capability ensures long-term measurement reliability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuto Power Off \u0026amp; Low Battery Indicator:\u003c\/strong\u003e Conserves battery life and alerts you before power runs out.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLightweight \u0026amp; Portable:\u003c\/strong\u003e At just ~95.5 g and 340 × 45 × 28 mm, it slips easily into a toolbox or glovebox.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHT5009\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Fluid Types\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDOT3, DOT4, DOT5.1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMoisture Detection Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0% – 4%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.3%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLCD with 3-color backlight\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSound \u0026amp; light (buzzer + LED)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 × 1.5V AAA batteries (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 95.5 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e340 × 45 × 28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × HABOTEST HT5009 Brake Fluid Tester\u003c\/li\u003e\n  \u003cli\u003e1 × User Manual\u003c\/li\u003e\n  \u003cli\u003e\u003cem\u003eNote: AAA batteries are NOT included.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the metal probe is clean and dry before use.\u003c\/li\u003e\n  \u003cli\u003eFully immerse the metal detection head into the brake fluid reservoir for at least 3 seconds.\u003c\/li\u003e\n  \u003cli\u003eWait for the display reading to stabilize, then record the result.\u003c\/li\u003e\n  \u003cli\u003eAfter testing, clean the probe thoroughly to avoid cross-contamination before testing another fluid type.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eRelated Products You May Like\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/25-in-1-precision-magnetic-screwdriver-set-pro-repair-tool-kit\"\u003e25-in-1 Precision Magnetic Screwdriver Set | Pro Repair Kit\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/4-pack-deer-whistle-wildlife-alert-devices-vehicle\"\u003e4-Pack Deer Whistle Wildlife Alert Devices for Vehicles\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/34-compartment-double-sided-hardware-storage-box-removable-dividers\"\u003e34-Compartment Double-Sided Hardware Storage Box \u0026amp; Dividers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.fueleconomy.gov\/feg\/drive.shtml\" target=\"_blank\" rel=\"noopener\"\u003eFuelEconomy.gov driving efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which brake fluid types does the HABOTEST HT5009 brake fluid tester support?\u003c\/h4\u003e\n\u003cp\u003eA: The HT5009 is compatible with DOT3, DOT4, and DOT5.1 brake fluids — the three most common types found in passenger cars, SUVs, trucks, and light commercial vehicles. It is not designed for DOT5 silicone-based fluid.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does the moisture percentage reading mean, and when should I change my brake fluid?\u003c\/h4\u003e\n\u003cp\u003eA: The tester measures the water content dissolved in your brake fluid (0%–4%). Most manufacturers recommend changing the fluid when moisture content approaches or exceeds 3%. The HT5009's 3-color backlit display and audio alarm make it easy to know when action is needed — green typically indicates good condition, yellow suggests monitoring, and red signals a fluid change is advisable.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do I need to buy batteries separately?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The HT5009 requires 2 × 1.5V AAA batteries, which are not included in the package. Standard AAA alkaline batteries available at any hardware or convenience store will work perfectly.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I keep the probe accurate over time?\u003c\/h4\u003e\n\u003cp\u003eA: Always clean the metal probe after each use to prevent corrosion, oxidation, or fluid residue build-up, as any of these can affect reading accuracy. The HT5009 also supports field calibration so you can recalibrate the unit as needed to maintain measurement precision.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which brake fluid types does the HABOTEST HT5009 brake fluid tester support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The HT5009 is compatible with DOT3, DOT4, and DOT5.1 brake fluids — the three most common types found in passenger cars, SUVs, trucks, and light commercial vehicles. 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