Quickly checks brake fluid moisture levels
Works with DOT3, DOT4, and DOT5.1 fluids
LED indicators show clear test results
Helps prevent brake failure and improve safety
Autool AS501 Brake fluid Tester is a professional-grade digital brake fluid tester designed to accurately detect the moisture content of various hydraulic fluids in just 10 seconds. By utilizing innovative pressure boost technology and a high-sensitivity sensor, it provides a stable and reliable assessment of whether your brake fluid needs immediate replacement to prevent brake fade or failure.
Broad Fluid Compatibility: Supports testing for six major types of brake fluids, including traditional DOT-3, DOT-4, DOT-5, and DOT-5.1, as well as the latest European standards ENV4 and ENV6.
Rapid & Precise Detection: Equipped with a built-in intelligent algorithm that analyzes water content and delivers results on the screen in approximately 10 seconds.
Intelligent 3-Level Rating: Provides an instant intuitive assessment of the fluid condition:
Good (< 2%): Within normal range; no immediate replacement needed.
Medium (2%–3%): Performance is beginning to be affected; monitor closely.
Poor (> 3%): Significant safety risk; replace fluid immediately.
Flexible Reach: Features a 260mm (approx. 10-inch) rigid flexible probe that allows easy access to deeply recessed brake fluid reservoirs in various vehicle types.
HD Backlit Display: A 1.8-inch high-definition screen ensures clear visibility of test results in both bright sunlight and dark workshop environments.
Corrosion-Resistant Hardware: The probe's outer layer is coated with iron oxide, offering excellent resistance to oil contamination, oxidation, and the corrosive nature of brake fluid.
One-Button Operation: Designed for simplicity with a one-button startup that requires no specialized professional knowledge to operate.
Power Efficient: Runs on 2 AA batteries (not included) and features ultra-low power consumption for extended field use.
| Feature | Specification |
| Detection Time | ~10 Seconds |
| Operating Temperature | -10°C to 50°C |
| Storage Temperature | -20°C to 60°C |
| Display Size | 1.8-inch Backlit LCD |
| Probe Length | 260mm (10.2 inches) |
| Weight | ~89g (without batteries) |
1pc * AUTOOL AS501 Main Unit
1pc * Instruction Manual
1pc * Protective Black Box/Hand Case
