
The brake oil test pen measures the moisture content of the brake oil based on changes in conductivity. It clearly displays the degree of moisture content through light-emitting diodes. High moisture content will cause the boiling point to lower and affect braking performance.


Made of high-precision metal material, please use a dry cloth or paper towel to wipe the liquid on the probe clean after each test, which will help extend the life of the test pen.
Pure copper induction coil, clear markings, durable, long service life, suitable for AA batteries.




The water content of 0% - 4% means no water, and the water content is distinguished in order, so that car owners can quickly understand whether the water content of the brake fluid is qualified.

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