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Description
DUOYI DY23B Car Brake Fluid Detection Pen Moisture Tester, DY23B1. Brake pressure was transmitted by brake fluid, the pressure transmission will out of function once brake fluid including too much water. In order to safe driving, we must test water ratio scale in brake fluid regularly. The brake fluid tester help us do current maintenance, make sure we drive in safety condition. 2. HD backlight dual display, support backlight display glare and easy reading day and night. 3. Operation Manual: (1). Install one
1. Brake pressure was transmitted by brake fluid, the pressure transmission will out of function once brake fluid including too much water. In order to safe-driving, we must test water ratio scale in brake fluid regularly. The brake fluid tester help us do current maintenance, make sure we drive in safety condition.2. HD backlight dual display, support backlight display glare and easy reading day and night.
3. Operation Manual:
(1). Install one 9V(6F22) battery at the back of tester.(not included)
(2). After inserting the battery, press POWER button to turn on the tester, all LEDs lights turn on with buzzer sounding, which indicates the product self-test is successful.
(3). Press SELECT button, it will locate DOT3 model automatically.
(4). Each time you push the SELECT button, it will recycle from DOT3 to DOT4 to DOT5.1 with the indicator LEDs.
(5). Immerse the probe into brake fluid and you will get different colors of LED lights, they indicate:
Green Light: indicates the brake fluid water content is below 1%
The First Yellow Light: indicates the brake fluid water content is approximately 1.5%
The Second Yellow Light: indicates the brake fluid water content is approximately 2.5%
The First Red Light: indicates the brake fluid water content is approximately 3%
The Second Red Light: indicates the brake fluid water content is more than 4%
(6). Press POWER button to turn off the tester.
4. Note:
(1). After use, please clean the probe and avoid any retention of stains that might affect the test.
(2). If in use for a long time, best to remove all batteries and store in a dry place at normal room temperature.
5. Package include:
Brake fluid tester x 1
User manual x 1
Specification:
| Package Weight |
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Shipping Notes
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.2 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
My bag for all seasons!
Color: Gold and Black Flower With Matching Wallet
Love it! Stylish. Well made.
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Your endless search for a stylish and functional bag ends here
Color: A5 Black and White
About three years ago, I bought this really cute navy blue and white striped handbag at Target and after about a year and a half of faithful service, the cloth lining started to fall apart. Every fiber of my being wanted to buy a new handbag and replace it but since I couldn't find anything I liked, I painstakingly sewed the lining back into place and carried on using the purse until its state of disrepair was beyond anything my novice sewing skills were capable of fixing.
This should indicate that I'm not the kind of person who just buys any handbag. I need it to have compartments. I need it to have a zipper that shields the purse's precious contents from the elements. I need it to be able to fit my Chromebook in the event that I'm traveling somewhere and need to bring it along. I need it to have functionality for both the typical workday and for weekend adventures. Lastly, I don't necessarily "need" it to match with most of my work clothes, but it's an added bonus when I can carry a handbag that makes me look effortlessly put together.
And here it is. I can tell that this is a handbag that will last me a long time, and I won't need to get out the needle and thread to maintain it. It looks sharp, it's sturdy, it fits everything, and the color I purchased even included a matching wallet. It was a big leap for me to buy a handbag without being able to have that tactile in-store "yes this will work for me" experience so if you're the kind of person who waffles back and forth about buying a handbag sight unseen via an online retailer, worry no more. This is the one.
However, a word of caution: If you're looking for something relatively small, this isn't it. This is a carry-everything-get-the-job-done-and-be-practical-and-cute-at-the-same-time type of handbag so if you're looking for something a little more portable, like for a night out, I'd recommend picking a style that includes the matching wallet so you can use it as a wristlet.
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Reviewed in the United States on June 1, 2018
★★★★★ 4
Beautiful But Heavy
Color: A3 Purple and Black
I bought this bag in black and purple and it's roomy and beautiful. I love how it looks and it's a good-quality, sturdy bag. That said, it's really stiff and heavy. Its weight and rigidity remind me of a briefcase that I carried in the '80s. Also, since it doesn't have any dividers in the middle, it's easy for things to fall to the bottom and get buried. This, however, was easily remedied by buying an insert purse organizer.
If you can live with all of that (I can see how some could) it's a great buy. As I mentioned before, it's a very nice, high-quality bag.
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Reviewed in the United States on January 17, 2025
★★★★★ 5
Good brand and great price
Color: Beige and Black With Matching Wallet
This brand always has great bags and purses I have a few more by this brand. Very spacious and good price!
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Reviewed in the United States on March 12, 2026
★★★★★ 5
Beautiful
Color: A3 Purple and Black
This was a gift for my mom and the picture does not give this justice. Beautiful purse.
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Reviewed in the United States on March 21, 2026