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CraftsmanCapitol™ Premium Brake Fluid Liquid Tester Pen

  • 100% high-quality made & ship from USA. 
  • We are proud to be a craftsman, proud to be an American. We pride ourselves on quality made craftsmanship.
  • Simple, saving time and no more hassle with your project.



  • Test the car brake fluid quality quickly to check whether it’s qualified, which can remind you to change the brake fluid when necessary to avoid traffic accidents.
  • The LED indicators will show the percentage of water in the brake fluid with 3 colors green yellow and red.
  • Calibrated for cars using DOT4 and DOT3 brake fluids (But DOT3 is almost replaced by DOT4 because DOT4 has better performance).
  • It only takes seconds to know the results, very easy to use.
  • CE and RoHS approved. Protective cap included.Takes 1 x AAA/1.5V battery (not included).

How To Uses:

  1. Turn on the brake fluid tester by pressing the button on top. A green light should light up. If the light does not come on, it may be time to change a battery.
  2. Unscrew the lid for the brake fluid reservoir, and take off the cap for the brake fluid tester.
  3. Dip the test probes into the brake fluid and the LED lights will indicate the percentage of water in the brake fluid.
  4. After testing, remember to screw the lid of the brake fluid reservoir back on tightly.
  5. The tester will automatically power off after 12 seconds of inactivity.

What to Do:
The LED lights will indicate the percentage of water in the brake fluid:

  • Green: No water.
  • Green/Yellow: Less than 1% of water.
  • Green /Yellow/Yellow: Approx.2% of water.
  • Green/Yellow/Yellow/Red: Approx.3% (Brake fluid should be changed).
  • Green/Yellow/Yellow/Red/Red: Approx.4% (Brake fluid must be changed urgently!).

Please Note:

  • The ITEQ brake fluid tester is calibrated for DOT4 and DOT3 brake fluids, and DOT4 is used in most cars produced since 2006.
  • Replace the battery if the green LED indicator no longer lights up after you press the button.
  • Wash the test probe with tap water after every use.
  • In case of skin contact with brake fluid, thoroughly wash the affected skin or clothing with water.
  • Do not expose brake fluid to the atmosphere for a long time as it is highly hygroscopic.

Package Includes:

  • 2 PC * Brake Fluid Liquid Tester Pen.

                Shipping Notice:

                After 3-5 business days, if your order is not shipped yet, this is because we are preparing the stock due to the high demand for some items. Rest assured your order will be shipped early next week from our warehouse in Chicago, Illinois. 

                If you need more information with your order, don't hesitate to contact us, we are more than happy to help.

                We believe & care about our customers happy. We stand behind our words, take high responsibility on your order, and ensure it arrives on time in the highest quality.


                After placing your order, our efficient Production Team will prepare, pack and ship your order with utmost care within 1-2 business days (in the unlikely event it can take more 3-5 days with high volume items to cause we need time to restock, don't worry, our team is working on it).

                Then this following shipping time will be applied:

                United States:
                USPS Domestic Shipping: 2-5 business days

                Canada, Europe, Australia, New Zealand:
                International Express Shipping: 7-10 business days

                Other Countries:
                International Express Shipping: 10-20 business days

                100% Satisfaction Guarantee

                We offer a 100% Satisfaction Guarantee. We will refund your money if you are not satisfied with your order due to the company's fault. This is to ensure to provide a risk-free shopping experience and make sure that the offer is not taken advantage of.

                In the unlikely event that your order hasn't arrived within 30 days (due to lost mail, etc.) please contact us and we will resend your order or refunds 100% money.