PRODUCTS
HKFT Digital Brake Fluid Tester
HKFT: Digital Brake Fluid Tester (Pocket 5-Stage LED Moisture Detector)
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- HKFT ปากกาทดสอบน้ำมันเบรกแบบพกพา – เครื่องวัดความชื้นแบบดิจิตอล
- HKFT Bút kiểm tra dầu phanh bỏ túi – bút đo độ ẩm kỹ thuật số
- Auto Tools/ Specialty
HKFT Digital Brake Fluid Tester is an essential handheld diagnostic pen engineered to measure water contamination in automotive brake hydraulic systems within seconds. Brake fluid is hygroscopic—naturally absorbing atmospheric moisture over time through rubber brake lines and reservoir seals. Excess water dramatically reduces boiling points, leading to catastrophic vapor lock, spongy pedal feel, and internal ABS valve corrosion.
Feature
Why Water Content Dictates Braking Safety
- Vapor Lock Prevention: Pure dry DOT 4 fluid boils around 230°C, but absorbing just 3% to 4% water can slash that boiling point below 155°C. Under heavy braking or mountain descent, the trapped water turns to steam pockets (gas), causing total brake pedal collapse.
- Corrosion Protection: Moisture buildup leads to oxidation inside master cylinders, wheel calipers, and delicate Anti-Lock Braking System (ABS/ESP) hydraulic modulators.
What brake fluid types can the HKFT test? The HKFT is calibrated for standard polyglycol-based fluids including DOT 3, DOT 4, and DOT 5.1. It is not formulated for silicone-based DOT 5 fluids, which do not absorb water in the same chemical suspension.
What does it mean if the Green LED does not light up when the button is pressed? If pressing the power button fails to illuminate the Green LED, the 1.5V AAA battery is depleted and must be replaced. A steady Green LED confirms both battery voltage and internal circuit integrity.
Why is brake fluid with over 3% water considered dangerous? Brake fluid naturally absorbs atmospheric water over time. Once moisture content reaches 3% to 4%, the fluid’s boiling point drops significantly. Prolonged or heavy braking generates high caliper heat, causing the water to boil into vapor bubbles. Because gas is compressible, the brake pedal can sink to the floor, causing sudden loss of braking force (vapor lock).
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