Brake Oil Test Pen/Brake Fluid Tester

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Color : Black

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  • 👍Product Introduction - The brake fluid test pen is used to test the quality of brake fluid. The test result of the water content percentage of the brake fluid is displayed by the number of the 5 LED lights on the test pen. The FT123 brake oil test pen measures the moisture content of the brake oil based on changes in conductivity.

  • 👍Performance features - powerful functions, simple operation, accurate measurement, safe to use, detects all brake fluid, and has automatic shutdown function. Can test DOT3/4/5 brake fluid.

  • 👍Product instructions - Green: The battery is OK/no water; Green/Yellow: The water content is less than 1%; Green/Yellow/Yellow: The water content is close to 2%; Green/Yellow/Yellow/Red: The water content is close to 3%, recommended Replace brake fluid,Green/Yellow/Yellow/Red/Red: The water content is higher than 4%, which is dangerous and the brake fluid must be replaced immediately. Note: The above data is for reference only.

  • 👍Preparation before testing - Unscrew the cap of the brake fluid reservoir and remove the cap of the test pen. Dip the test probe into the brake fluid in the reservoir.


  • Material: Plastic

  • Weight: 100G


  • Free Shipping Over $50.

  • Orders will be processed within 7 business days of ordering and shipped out the next day after the processing day. Orders will generally be delivered within 7 to 14 working days.

Returns:Fast refund for any dissatisfaction within 15 days, 100% money-back guarantee.


  • Due to manual measurements, please allow slight measurement deviations.

  • Due to the different display and lighting effects, the actual color of the item may be slightly different from the color displayed on the picture.