Brake Fluid Liquid Tester Pen
Brake Fluid Liquid Tester Pen
Brake Fluid Liquid Tester Pen
Brake Fluid Liquid Tester Pen
Brake Fluid Liquid Tester Pen
Brake Fluid Liquid Tester Pen

Brake Fluid Liquid Tester Pen

56 Reviews
14 - 21 Business Days
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Estimated Delivery Date: Friday, Oct 13

Due to high demand, please allow at least 2-4 weeks for delivery.

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Your tracking number will be sent to you after 3-5 processing days.

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Product Details
Item Specifics
Shipping & Returns
About Us
Product Details

Brake Fluid Liquid Tester Pen

Ensure your safety on the road with the Brake Fluid Liquid Tester Pen. This compact and versatile tool instantly checks the quality of your brake fluid, so you can drive confidently knowing your brakes are in optimal condition.


Instant Brake Fluid Testing: Quickly determine brake fluid quality, ensuring your car’s safety, so you can drive with confidence.

Brake Fluid Liquid Tester Pen
DOT3/DOT4 Compatibility: Versatile tester pen works with both DOT3 and DOT4 brake fluids, so you can use it on various vehicles.
Brake Fluid Liquid Tester Pen
    1. 5 LED Indicator Display: Clear and easy-to-read LED lights indicate the quality of your brake fluid, so you can make informed maintenance decisions.

Brake Fluid Liquid Tester Pen


Car Accessories Essential: This brake fluid tester pen is a must-have tool for every car owner, so you can ensure optimal braking performance.

Brake Fluid Liquid Tester Pen


Portable and Convenient: Compact design allows you to carry the tester pen anywhere, so you can test brake fluid quality on the go.

Brake Fluid Liquid Tester Pen

    • 5 LED indicators so you can quickly and easily see the percentage of moisture in your brake fluid. This feature is beneficial because it allows you to check the condition of your brake fluid without having to take your car to a mechanic. This can save you time and money, and it can help you keep your car safe on the road.


The LED Indicator Display of our Automotive Brake Fluid Tester Pen provides clear and immediate results:

  1. Green LED: Indicates brake fluid with water content (H2O) below 1.5%, qualifying it as suitable for use.
  2. Yellow LED: Signals brake fluid with water content ranging from 1.5% to 3%, indicating it can still be used for the next six months before retesting.
  3. Red LED: Warns of brake fluid with water content exceeding 3%, indicating the need for immediate replacement.

Furthermore, the red LED flashing indicates the need for battery replacement, while the yellow LED suggests low moisture content, prompting retesting in six months. The LED sequence of green, yellow, and red corresponds to various water content levels, ensuring accurate assessment of brake fluid quality.

Get the Best Price on our Brake Fluid Tester, a reliable tool to assess oil quality with a liquid LED display. Maintain optimal brake performance and ensure your safety on the road.Brake Fluid Tester Car Brake Fluid Digital Tester Suitable for Determining Brake Fluid drect Sell.


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  • The finest materials and stunning design — all our products are developed with an obsessive dedication to quality, durability, and functionality
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Our mission is to make your shopping experience as safe and enjoyable as possible. Have questions? Feel free to contact our award-winning customer care team for advice on everything from product specifications to order tracking.

  • Money back guarantee: Something not quite right? If you’re not totally satisfied with your purchase, you can return it within 15 days for a full refund
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Item Specifics
Mainland China
HT662 Brake fluid test pen
Moisture detection range:
Brake oil water content 1:
0~2%, Can be used normmally
Brake oil water content 2:
Less than 2.5%, Still can use
Brake oil water content 3:
More than 3%, Need to replace
Alarm method:
Sound and light alarm
Red and green backlight
Power supply:
2x1.5v AAA batteries(not included)
Shipping & Returns


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:

Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of Best Car Seat Protectors (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.


How much do you charge for shipping?

We provide free shipping to over 200 countries around the world*
*with some exceptions

Will I be charged any shipping, customs or duties fees?

No, the price you see is the price you pay - you won't be charged any extra fees.

When will you ship my order?

If you order an in-stock item, we’ll ship it within 3 working days.

How long will my order take to arrive?

Orders are shipped by EMS or USPS. Typically, delivery takes 5-20 working days after dispatch, but it may take longer due to factors beyond our control.

Do you provide tracking information?

You will receive your tracking information within 3-5 working days. But sometimes tracking might not be available if free shipping applies. In this case, please contact us at

Can I cancel my order?

You can change or cancel your order within 12 hours. Please contact us at

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