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Ships within 48 hours · Estimated delivery Sep 3 - Sep 8
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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
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
Great product. No white cast
Size: 1.7 Fl Oz (Pack of 1)
This is a great everyday face sunscreen. It doesn’t leave a white cast. It’s not greasy. It leaves a nice dewy finish. Strongly recommend.
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Great sheer mineral sunscreen!
Size: 1.7 Fl Oz (Pack of 1), Size: 1.7 Fl Oz (Pack of 1)
I’ve never been a mineral sunscreen fan but I really love this one. I needed a mineral sunscreen for days where I knew I was going to be sweating or swimming because the chemical stuff would run into my eyes and burn so bad. This one doesn’t burn my eyes at all.
It doesn’t leave a white cast but it is a little oily and leaves me quite shiny for about 10-15 mins until it fully dries. I don’t really mind because it works well.
I would definitely recommend 👌
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Reviewed in the United States on October 14, 2025
★★★★★ 4
It's okay. Better for dry skin.
Size: 1.7 Fl Oz (Pack of 1)
It's a nice product but still too greasy for my poor skin. It's pretty moisturizing. It isnt thick, but my skin gets greasy quickly with it. (I prefer Australian Gold tinted (the big tube meant for the body, not face).
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Reviewed in the United States on March 18, 2026
★★★★★ 3
Greasy on face
Size: 1.7 Fl Oz (Pack of 1)
Feels greasy when you put it on.
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Reviewed in the United States on April 18, 2026
★★★★★ 5
Just like the other but better!
Size: 1.7 Fl Oz (Pack of 1)
I love the regular mineral face sunscreen so wanted to try the new liquid face sunscreen! It seems to be the same formula but way easier to apply. Applies more like a moisturizer and easy to run in! It still has the same protection and reliability!! Sunbum will always be a favorite!
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Reviewed in the United States on August 23, 2025
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