This brake fluid moisture tester features a corrosion-resistant probe that can quickly and accurately detect DOT-3, DOT-4, DOT-5.1 brake fluid with an accuracy of up to ±0.3% and a detection range of 0% - 4%. The digital brake fluid tester display also has a flashlight illumination to ensure that your tests are not affected by ambient light.
High-Sensitivity Quick-Response Probe Ensures Accurate and Stable Detection
High-Resolution Backlit Screen for Clear Readings
SISCO brake fluid tester is widely used in automotive workshops, inspection stations, fleet maintenance, and by car owners for routine vehicle care. It quickly detects moisture content or boiling point changes in brake fluid, helping ensure reliable braking performance and compliance with DOT standards (DOT 3, DOT 4, DOT 5.1). This makes it an essential tool for mechanics, inspectors, and drivers to maintain safety and prevent brake failure.
Model | SISCO-BFT-HT5009 |
Moisture Detection Range | 0%~4% |
Resolution | 0.10% |
Accuracy | ±0.3% |
Brake Oil Type | DOT3, DOT4, DOT5.1 |
Display | LCD display |
Power Supply | 2. 1.5V AAA batteries (not included) |
Operating Temperature | -20~60℃ |
Dimensions | 340*45*28mm |
Weight | 100g |
Low Battery Indication | √ |
Trichromatic Backlight | √ |
Flashlight | √ |
Auto Shutoff | √ |
Battery Low Voltage Indicator | √ |
Buzzer Alert | √ |
Q1: What is a brake fluid tester?
A1: A brake fluid tester is a tool used to check the condition of brake fluid in a vehicle. It measures factors like water content or boiling point, since moisture in brake fluid lowers its effectiveness and can lead to brake failure. By providing a quick pass/fail or percentage reading, it helps determine whether the brake fluid is safe to use or needs to be replaced.
Q2: What types of brake fluid can a brake fluid tester test?
A2: Most brake fluid testers are designed to test glycol-based fluids, including DOT 3, DOT 4, and DOT 5.1. These are the most common types used in passenger cars and light trucks. They are not suitable for DOT 5 silicone-based brake fluid, which requires different testing methods.
Q3: How does a brake fluid tester work?
A3: A common brake fluid tester works by submerging its electrodes into the brake fluid, then measuring the electrical conductivity of the fluid. Because brake fluid naturally absorbs water over time, this water increases its conductivity. The tester uses a traffic light system of LEDs to indicate the percentage of water content and the overall condition of the fluid, with green meaning no water and red indicating a high level of moisture that requires a brake fluid flush.
Tips: Why is water content in brake fluid dangerous?
Excess water in brake fluid is one of the hidden dangers that can seriously compromise driving safety. Because brake fluid is hygroscopic, it gradually absorbs moisture from the air over time. This contamination lowers the fluid’s boiling point, making it more likely to vaporize during intense braking, which can lead to brake fade, a spongy pedal feel, or even complete brake failure. At the same time, moisture accelerates rust and corrosion inside brake lines, calipers, and other key components, increasing the risk of costly repairs. By regularly checking the water content with a brake fluid tester, drivers can ensure their braking system remains responsive, reliable, and safe under all driving conditions.
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