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Brake Fluid Testers

Brake fluid absorbs moisture over time, which lowers its boiling point. This makes it dangerous. A brake fluid tester measures the water content accurately. You will see immediately if the fluid needs changing. Choose between an electronic tester with a precise reading or a simple LED version. Pick a model with a long probe for hard-to-reach places. Check whether it works on batteries and if you can hang it on the brake fluid reservoir. That makes it easy to use in the workshop.

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Brake Fluid Tester: Which One?

Check the water content

Brake fluid absorbs moisture. That lowers the boiling point. This is dangerous, as brakes can fail. A brake fluid tester measures the water content in the fluid. You see immediately if replacement is needed. Always test at the caliper, not just in the reservoir. That is where the oldest fluid sits.

Electronic or simple version

Choose the version that fits your work. An electronic brake fluid tester gives a precise percentage. A simple tester works with lights. It only gives an indication. For a professional workshop, electronic is the better choice. You know exactly when to replace.

Check the probe and batteries

A long probe is useful for hard-to-reach spots. Check if the tester runs on batteries. Some models can hang on the brake fluid container. That works well. Choose a model you can use quickly. This prevents errors and makes you efficient.

This tester belongs with the test devices for the workshop. If you also want to check oil pressure, take a look at engine, oil pressure. For a quick voltage check use a multimeter or voltage tester, and power it with the right batteries.