$54.90
Free delivery · 7–14 days
Cold-Pressed Castor Oil for Hair, Lashes & Skin | 100mlBrake Fluid Tester — Instant Brake Fluid Quality Check
From the seller
Instantly know your brake fluid's moisture level with this digital pen tester. A simple dip gives a green/yellow/red LED reading, so you know whether to keep driving or schedule a change.
Read the full descriptionDescription
Instantly know your brake fluid's moisture level with this digital pen tester. A simple dip gives a green/yellow/red LED reading, so you know whether to keep driving or schedule a change.
Know Your Brake Fluid’s Condition Instantly
Dip the pen-sized tester into the reservoir, and a clear LED reading tells you if the fluid needs changing — no guesswork, no overpayment.
Three Reasons Every Workshop Needs One
- Sealed Brass Probe
The corrosion-resistant tip wipes clean with a rag. No loose strips, no fluid splashing — just a precise dip and a clear reading.
- Foolproof Traffic‑Light Display
Green means fluid is good, yellow means monitor, red means change now. Even a first‑time DIYer can interpret it without flipping through a manual.
- Tucks Into Your Kit
At barely 15 cm long, it lives in your glovebox or toolbox. Whenever you check oil or top up washer fluid, a quick brake‑fluid reading adds no extra effort.
How to Test Your Brake Fluid in Seconds
- 1Remove the reservoir cap
With the engine off and cool, open the master cylinder reservoir (usually under the hood, near the driver’s side). No draining required.
- 2Dip the probe
Insert the brass tip fully into the fluid so it’s submerged. Hold it steady — the reading triggers automatically.
- 3Read the light
Green, yellow, or red gives you an instant verdict. No buttons, no calibration.
- 4Wipe and store
Pull the tester out, wipe the probe with a clean rag, replace the cap, and put it back in your toolbox. Done.
From Hidden Danger to Confident Control
The Problem Hiding in Your Lines
Even with the hood closed, moisture seeps in. Water-laden fluid reduces braking performance, can cause corrosion, and leads to expensive repairs — yet every car is vulnerable.
A Simple Dip, a Straight Answer
No strips, no sending samples to a lab. Press the probe into the fluid, and in under three seconds the LEDs show green, yellow, or red — so you know whether to keep driving or schedule a change.
Characteristics
Main
CategoryBrake
Details
TypeBrake
CategorySkin Care
TargetsHydration
Best forMen
Reviews
Questions and answers
How does the tester actually work?
w
Wanelo · seller
The brass probe measures the electrical conductivity of the brake fluid. Because water is more conductive than fresh fluid, a higher moisture level triggers a different LED color. It’s the same principle professional shops use — just shrunk into a pen.
Will it work with my car’s brake fluid?
w
Wanelo · seller
Yes — the tester is designed for DOT3, DOT4, and DOT5.1 fluids, which cover virtually every passenger vehicle on the road today. Just open the reservoir and dip.
How often should I test?
w
Wanelo · seller
Manufacturers recommend testing brake fluid every 6–12 months, or at every oil change. Using this pen, the check takes less time than checking your wiper fluid.
What do the three lights actually mean?
w
Wanelo · seller
Green = moisture below 1.5%, fluid in good shape. Yellow = 1.5‑3%, monitor and plan a change soon. Red = above 3%, change fluid as soon as possible to keep braking performance safe.
Is this accurate enough to trust my brakes to it?
w
Wanelo · seller
It’s a qualitative tool, not a laboratory instrument. The traffic‑light feedback is consistent and repeatable, and it reliably catches moisture contamination that would otherwise go unnoticed. Think of it as a health check — not a calibration device.
Why not just have a shop test it?
w
Wanelo · seller
A single fluid test at a shop often costs as much as this pen. With this in your toolbox, you can test whenever you want, on any car in your family — and never pay a diagnostic fee for it again.
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