Brake Fluid Pen Tests of 2025
Best Choice1
TESMENTESMEN TBF-300 Brake Fluid Tester with 8.5-Inch Corrosion Resistance Gooseneck Probe, Testing for DOT3, DOT4, DOT5.1, Brake Fluid Tester Pen with Light, Data Hold, Backlight Alarm for Auto Care-Green
Main highlights- What will you get: TESMEN TBF-300 Brake Fluid Tester comes with 2*1.5V AAA batteries, a user manual. Additionally, it comes with a custom storage pouch that helps protect the metal probes from wear and tear while also preventing loss
- Precise Measurement: TESMEN TBF-300 Brake Fluid Tester supports DOT3, DOT4, and DOT5.1 brake fluid types, providing accurate readings within the 0%-4% range that is perfect tool for both service professionals and DIY enthusiasts
- Large Display for Easy Reading: TESMEN TBF-300 Brake Fluid Tester features an enlarged screen and a data retention function, ensuring clear and convenient reading and recording of measurements
- Enhanced Functionality: TESMEN TBF-300 is equipped with an flashlight illumination to ensure that your tests are not affected by ambient light. This feature enables accurate testing even in low light or dark conditions, increasing the convenience and versatility of the tester while providing a more comprehensive inspection experience
- Corrosion-resistant and Clean: TESMEN TBF-300 brake fluid tester features a corrosion-resistant metal probe paired with an 8.5-inch adjustable gooseneck. This design ensures flexible operation while preventing device corrosion and maintaining cleanliness, ultimately extending the tester's lifespan
9.8Exceptional
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Value for Money2
KINGBOLENBrake Fluid Tester, High Precision Car Brake Fluid Detector, Hydraulic Fluid/Liquid/Oil Moisture Analyzer with LCD Screen Audible Alarm DOT3 DOT4 DOT5.1 Tester,Automotive Replacement Level Sensors
Main highlights- [W-ORRY-F-REE SERVICE] --- The package doesn't include battery, please buy batteries in your local market. And We offer 1 year W-arranty. If you cannot confirm its compatibility, please feel f-ree to consult us. support@kingbolen.com. Automotive Replacement Brake Fluid Level Sensors.
- [Scope of Application] --- Automotive Brake Fluid Detector is common fit for most vehicle. Check the health status of DOT-3, DOT-4, DOT-5.1 brake fluid and also most synthetic brake fluids. It's extremly convenient for personal use and broadly applied in individual workshops, repair factories and dealer workshops.
- [Premium quality and ergonomic design] --- body with good texture, compact size, perfect hand feeling. Gooseneck surface oils and oxidation resistant, not easily corrosive. Simple control panel, easy to use. Probe top with flash light, you can observe the colour of the brake fluid if needed.
- [Precision test and universal probe] --- Highly sensitive and precise probe, can quickly and accurately detect DOT-3, DOT-4, DOT-5.1 brake fluid and has received the result in seconds. The gooseneck probe provides flexibility in detection, making the detection process more elastic and efficient. Probe top with flash light, you can observe the colour of the brake fluid if needed.
- [Easy Instant Read and Alarm] --- High sensitive probe + high resolution screen + audible alarm, instant display result, large display with backlight, easy and clear reading in sun or night. NEVER LIMITED BY THE ENVIRONMENTS. As soon as brake fluid sounds too much water alarm, it will remind you that you need to change the brake fluid.
9.6Exceptional
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3
ITEQ18% OffITEQ Brake Fluid Liquid Tester Pen with 5 LED Indicators, Calibrated For DOT3 DOT4 Brake Fluid
9.3 Simple to use8.7 Precision8.0 lasts a long timeWhy we love it
Quickly checks brake fluid quality to prevent accidents.
Easy-to-read LED indicators show water percentage clearly.
Simple and fast results in seconds, very user-friendly.
9.4Excellent
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4
YOGEIERBrake Fluid Liquid Tester Pen,1PC DOT 3 DOT 4 DOT 5.1 Brake Fluid Liquid Tester Pen, Car Diagnostic Testing Tool with 5 LED Indicators, Hydraulic Fluid Liquid Oil Moisture Analyzer
Main highlights- Scope of application: This brake fluid tester is suitable for testing the moisture content in DOT-3, DOT-4, DOT-5.1 brake fluid. It is also very convenient for personal use and this product is widely used in personal workshops, repair shops and dealer workshops.
- Safe driving: This brake fluid tester comes with 5 LED indicators to show the percentage of moisture in the brake fluid. This product can quickly detect the health of the car's brake fluid, provide you with more accurate test results, and remind you to replace the brake fluid when necessary to avoid traffic accidents.
- High quality: This brake fluid tester is made of nickel-plated metal probe, which is resistant to oil and oxidation and not easy to corrode. The shell is black matte plastic, better anti-slip and good body texture. The change of conductivity can be used to determine the change of moisture in the brake fluid.
- Easy to carry: No cable connector design, small size, light weight, easy to carry and use. If you encounter any problem when using this product, please contact us and we will try our best to solve it for you.
- Convenient and quick: This brake fluid tester is easy to use, press the button, insert the test pen, the indicator is accurate to 1%, and you can receive the result in seconds. To save electricity, the test pen will automatically turn off the power after 20 seconds each use to save power.
9.3Excellent
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5
KAIWEETS20% OffKAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1
Why we love it
Durable and corrosion-resistant design.
Quick and precise measurements.
User-friendly with convenient alerts.
9.2Excellent
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6
TESMEN15% OffTESMEN TBF-200 Brake Fluid Tester with 8.5-Inch Corrosion Resistance Gooseneck Probe, High-Precision Brake Fluid Tester Pen with Data Hold, 3 Colors Backlight Alarm for DOT3, DOT4, DOT5.1-Green
Main highlights- What will you get: TESMEN TBF-200 Brake Fluid Tester comes with 2*1.5V AAA batteries, a user manual. Additionally, it comes with a custom storage pouch that helps protect the metal probes from wear and tear while also preventing loss
- Versatile and Feature-Rich: TESMEN TBF-200 Brake Fluid Tester is a comprehensive inspection tool, compatible with three types of brake fluids: DOT3, DOT4, and DOT5.1. Additionally, it features a data hold function, making it easy to record measurements during testing
- Efficient Measurement and Quick Readout: TESMEN TBF-200 is equipped with a digital display and a tri-color backlight alarm system. With a measurement range of 0%-4%, it allows you to quickly draw conclusions based on the clearly displayed values
- Corrosion-resistant and Clean: TESMEN TBF-200 brake fluid tester features a corrosion-resistant metal probe paired with an 8.5-inch adjustable gooseneck. This design ensures flexible operation while preventing device corrosion and maintaining cleanliness, ultimately extending the tester's lifespan
- Compact and Portable for Easy Use: Weighing only 0.15lb and featuring a convenient back clip, the TESMEN TBF-200 is designed for easy portability. Its user-friendly design makes it an essential tool for ensuring your safety and peace of mind
8.9Very Good
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7
AicevoosAicevoos NF Brake Fluid Tester Pen Brake Fluid Test Strips, Calibrated for DOT3 DOT4 DOT-5.1 Brake Fluid
Why we love it
Universal compatibility for most vehicles.
Quick and easy brake fluid testing.
Compact design for portability.
8.8Very Good
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8
GasedinGasedin Brake Fluid Liquid Tester Pen, DOT 3 DOT 4 DOT 5.1 Brake Diagnostic Testing Pen Tool, Brake Fluid Liquid Oil Analyzer with 5 LED Indicators, Universal Car Accessories
Main highlights- 【Premium Material】: Our brake fluid test pen is made of high quality degree brass metal. It has good oil resistance, which is not easy to be corroded. Therefore, it can be used for a long time. The case is frosted with a good anti-slip design, so it is not easy to fall off when you use it.
- 【Operating Methods】: First, unscrew the brake fluid reservoir and then pull off the brake fluid tester cap. Second, press the button for power on, green LED will light up. Third, insert the tester into reservoir for one second, then the test result will be correctly indicated by LED. Finally, repress the button for power off.
- 【Core Function】: This brake fluid liquid tester pen is mainly used for checking the health of your car's brake fluid, providing you with more accurate test results. What's more, it can remind you to change the brake fluid when necessary, which can effectively avoid traffic accidents.
- 【Checking Function】: The water content will be indicated by the number of LED's on the test pen. A red light indicates that the brake fluid needs to be changed, a green light indicates that the brake fluid is in good condition, and a yellow light indicates that the brake fluid is in fair condition.
- 【Application Scope】: It is suitable for testing the moisture content in DOT-3, DOT-4 and DOT-5.1 brake fluid. It is compatible with AAA batteries, but please note that batteries are not included in the package. Please follow the direction of the arrow on the test pen to open the battery cover.
8.7Very Good
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9
AicevoosAicevoos NC Brake Fluid Tester Pen Brake Fluid Test Strips, Calibrated for DOT3 DOT4 DOT-5.1 Brake Fluid
Main highlights- WIDE RANGE OF APPLICATIONS: The automotive brake fluid tester is a universal device for most vehicles. It can check the condition of DOT-3, DOT-4, DOT-5.1 brake fluids as well as most synthetic brake fluids. It is extremely easy for personal use and is widely used for private workshops, repair shops and car dealerships.
- FAST DETECTION: the detection process is fast and efficient, the control panel is simple and easy to use. Can quickly determine whether the brake fluid needs to be replaced after the background light reminder.
- EASY TO USE: The test procedure is fast and efficient and has a simple control panel. The backlight lights green at 0%-2% data (brake fluid is ready to use). At 2%-3%, the backlight turns yellow and the buzzer sounds slowly (brake fluid needs to be changed). The backlight is red and the buzzer sounds quickly when the data is greater than 3% (brake fluid needs to be changed immediately).
- EASY TO CARRY: the case is well structured, compact and fits well in your hand. You can take it with you when traveling without taking up too much space.
- EASY READING: high-sensitivity probe + audible alarm, instant display of results, large screen with three-color backlight, easy to read the measurement results whether day or night.
8.6Very Good
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10
intendvisionBrake Fluid Tester Pen, Automotive Brake Fluid Moisture Tester, Vehicle Brake Diagnostic Testing Tool, Hydraulic Fluid Liquid Tester Pen Oil Moisture Tester Analyzer Meter for DOT3 DOT4 DOT5.1
Main highlights- 【Sound & Light Dual Alarm】When the brake fluid tester detects the value is between 0~2%, the backlight turns green, which means the brake oil can still be used. When the value is tested between 2~3%, the backlight is yellow, and the buzzer buzzes slowly, please change the brake oil. When the detected value is above 3%，the backlight turns red, and the buzzer buzzes quickly, please change the brake oil immediately. Tips: please wipe the probe clean, otherwise it will affect the results.
- 【High Quality & High Sensitive】This brake system diagnostic testing tool has a built-in high-quality probe, which is high sensitivity and fast response. The water content is 0%-4% representing no water and the amount of water content in turn, so that car owners can quickly understand whether the water content of the brake fluid is qualified. It is made of ABS material, which is moisture-proof and impact-resistant. Automatically shut down if there is no operation for 5 minutes.
- 【Easy to Use】This brake fluid tester is easy to use. 1. After install the batteries, gently remove the cap, hold on the power key for more than 1second. After the buzzer beeps, the screen lights on, and then choose the current oil type you want to test. 2. Insert the test probe into the brake fluid and immerse it in the liquid surface at most 2-5mm (please wipe the probe clean before or after using, otherwise it will affect the results). 3. Check the results through the display.
- 【Convenient Pocket Clip Design】Lightweight and compact, this brake fluid tester conveniently clips to your shirt pocket to carry with you. It fits nicely and ergonomically in your hand while working. Has an easy-to-understand interface, customers can operate the device with one hand. Out of the box you can rest assured of the Brake Fluid Tester and just enjoy 3-Year Warranty provided by Intendvision. Anything please feel free to contact us and we will try our best to help.
- 【3 Oil Type Detection Brake Fluid Tester】This brake fluid tester can be used to detect brake oil DOT3, DOT4, DOT5.1. DOT3 is the most common type of brake fluid used by daily drivers and it is also the default brake oil type when the brake fluid tester power on; DOT4 has a higher boiling point and has found its place in racing vehicles and police cars. DOT5 mainly used in special vehicles such asracing cars, but rarely used in passenger cars.
8.5Good
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