FluidCheck - Brake Fluid Pen | LED Brake Oil Water Content Tester DOT3/DOT4/DOT5

Feel Safer on the Road – Get Quick Guidance with FluidCheck

• 🧰 Simple and compact – small enough to store in the glove compartment, ready when you need it.
• 💡 LED display – provides a clear indication of any water content in the brake fluid.
• 🚗 Fits multiple types – compatible with DOT3, DOT4 and DOT5 for wider use.
• 🔋 Automatic shutdown – smart function that saves battery after each check.
• 🔎 Visual guidance – a quick way to check the condition of your brake fluid before booking a service.

Keeping track of your brake fluid can be crucial. FluidCheck is a handy tool that can provide a quick, visual indication of the condition of your fluid – right on the spot in your garage or driveway.

Quick Visual Check – Without Complicated Steps

With just the push of a button, you can activate FluidCheck and dip the test probes directly into the brake fluid reservoir. Within seconds, a colored light pattern appears that can provide guidance on whether the moisture content is low, moderate or high.

When Should You Change Your Brake Fluid? FluidCheck Can Help You Be More Prepared

It is not uncommon for brake fluid to absorb moisture. Over time, this can affect the fluid’s properties – but it is difficult to see with the naked eye. FluidCheck is designed to give you a quick indication of the situation, so you can make an easier decision before it becomes a problem.

Light to Guide – See Brake Fluid Status in Seconds

Color Coded LED Indicator – What Does It Show?

• Green light: H2O < 1.5% – The fluid appears to be in good condition
• Yellow light: H2O approx. 1.5–3% – The liquid appears to be usable, check again in approx. 6 months
• Red light: H2O > 3% – Fluid appears contaminated and may need to be replaced
• Flashing red: The fluid appears to have a high moisture content – ​​check or replacement may be necessary

Used Like This

1. Press the button to start
2. Remove the cap and dip the metal probes into the brake fluid
3. Read the LED lights – they can indicate a possible water content
4. After about 12 seconds it turns itself off.
5. Remember to put the lid back on after use.

Small but Smart

FluidCheck is compact, lightweight and shaped like a pen – making it easy to carry around or store in your glove compartment, toolbox or pocket. Thanks to the built-in clip, you can keep it close at hand while you work. Despite its small size, it can provide a quick overview of the condition of the fluid, which can be helpful for both routine maintenance and unexpected checks.

Fits Multiple Vehicle Types

Because FluidCheck is compatible with DOT3, DOT4 and DOT5 brake fluids, it can be used on a wide range of vehicles – from older cars with simple systems to newer models with more advanced technology. It can also be suitable for motorcycles, vans and other vehicles where it is important to keep an eye on the condition of the brake fluid.

What's Included in the Package

1 x FluidCheck brake fluid pen
(Battery not included)