POROMETISTO Brake Fluid Tester FT01 with Flashlight — 0–4% Moisture, ±0.3% Accuracy, Three-Color Alert

The POROMETISTO FT01 is a handheld brake fluid tester that measures water content in DOT3, DOT4 and DOT5.1 fluids, with a built-in flashlight and three-color alert system for quick, accurate checks.

If you maintain vehicles, the FT01 offers a compact, easy-to-read way to verify brake fluid condition before service. It uses a calibrated sensing circuit and a corrosion-resistant probe to estimate moisture percentage in brake lines, then signals results with green, yellow, or red backlights plus a buzzer. The tool is designed for workshop and roadside use, providing data hold, auto-off, and a low-battery indicator so you can rely on results when it matters.

How does the FT01 determine if brake fluid needs replacing?

The FT01 measures the electrical properties of the fluid to estimate moisture content and compares that value to safety thresholds. Built-in calibration improves consistency across tests, producing a readout range from 0% to 4% moisture with ±0.3% accuracy. Visual and audible alerts guide your decision quickly without interpreting raw numbers.

• Built-in calibration resistor for consistent readings
• Detection range 0%–4% moisture with ±0.3% accuracy
• Three-color backlight and buzzer for immediate status

Can I use the FT01 in tight spaces or at night?

Yes — the FT01 was built for cramped engine bays and low-light conditions. It features an 8.5-inch corrosion-resistant metal hose and a slim metal probe to reach recessed bleed nipples, and an integrated flashlight to illuminate the test area. The probe's shape and flexible hose let you position the sensor without spilling fluid or removing components.

• High-precision metal probe for small-space access
• 8.5-inch corrosion-resistant hose for reach and flexibility
• Integrated flashlight for dark working environments

What do the lights and beeps mean during a test?

The FT01 uses an intuitive color and sound system so you can act fast. A bright green backlight indicates the fluid is within acceptable limits, yellow with a slow beep advises scheduled replacement, and red with a fast beep signals immediate attention is recommended. This combination reduces ambiguity when assessing brake fluid health.

• Green backlight: fluid usable
• Yellow backlight + slow buzzer: replace soon
• Red backlight + fast buzzer: replace immediately

What accessories and support come with the FT01?

The kit arrives ready to test right away and includes spare batteries and documentation. POROMETISTO backs the unit with support channels and a one-year free replacement policy for qualifying issues, making it convenient for both DIYers and professionals. The compact carrying box protects the instrument between uses.

• Includes 2 × 1.5V batteries, manual, and storage box
• Data hold, automatic shutoff, and low battery indicator
• One-year free replacement service and customer support

Who is this for: The POROMETISTO FT01 is aimed at car owners, DIY mechanics, and professional technicians who need a fast, portable method to assess brake fluid moisture. If you perform brake maintenance, troubleshoot braking issues, or inspect fleet vehicles, this pen-style tester helps prioritize fluid service without complex equipment. It’s also a practical gift for anyone who works on cars and values a reliable, easy-to-use diagnostic tool.