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Description
DUOYI DY519 Digital Manifold Gauge Air Conditioning Fluoride Meter, DY5191. Product functions: vacuuming refrigerant filling pressure maintenance and pressure measurement 2. Pressure test, simultaneous display of evaporation or condensation temperature readings 3. Pressure leak test, which can measure the initial pressure, real time pressure, and pressure difference measured at the set test time 4. Vacuum operation, simultaneous display of vacuum degree and pressure readings 5. Built in common refrigerant curves Parameters
1. Product functions: vacuuming/refrigerant filling/pressure maintenance and pressure measurement2. Pressure test, simultaneous display of evaporation or condensation temperature readings
3. Pressure leak test, which can measure the initial pressure, real-time pressure, and pressure difference measured at the set test time
4. Vacuum operation, simultaneous display of vacuum degree and pressure readings
5. Built-in common refrigerant curves
Parameters
1. Applicable refrigerants include 24 mainstream refrigerants: R123, R1234yf, R134A, R14, R141B, R142B, R22, R23, R290, R32, R404A, R407C, R407F, R410A, R417A, R438A, R449A, R452A, R513A, R600, R454B, R454C
2. Pressure test unit: Kpa, MPa, Bar, inHg, Psi, Kgf/cm2
3. Pressure test resolution: 1Kpa
4. Pressure test range: 0-6000Kpa
5. Vacuum test range: -101Kpa - 0Kpa
6. Pressure test accuracy: +/-0.5% (full scale) + 5 digits
7. Pressure overload limit: 10000Kpa (10Mpa; 100Bar)
8. Dimensions: 135x70x40mm
9. Weight: 450g
Specification:
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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
4.8 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 1
No Good
So I got this under the impression by the videos online that this was really concealing under the eye and it’s not…very oily and hasn’t done anything for under my eyes at all! Scam!
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Reviewed in the United States on June 8, 2026
★★★★★ 5
Great product!
Love this product. Lightweight and feels great on the skin.
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Reviewed in the United States on June 7, 2026
★★★★★ 5
There is a reason why this went viral!
Set name: KOJIC
This works wonders. I went with a sand and stone deodorant, while it gets the job done,it makes my armpits dark. With this stuff, it takes care of my pits and keeps them looking nice. Also great for scratchy feet. Keeps them soft and healthy. Will be purchasing again!
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Melaxin
Set name: KOJIC, Set name: KOJIC
I’ve been using the Melaxin Body Keratin Care Kojic Acid Turmeric treatment, and I’m honestly impressed with how it has improved my skin texture and tone.
This product combines kojic acid and turmeric, which are known for helping brighten the skin and reduce the appearance of dark spots. It also contains keratin and other nourishing ingredients that leave my skin feeling soft, smooth, and hydrated. 
After a few uses, I noticed my skin looked more even and radiant, especially in areas like my arms and elbows. It gently exfoliates and helps remove dead skin without causing irritation, which is great for sensitive skin. 
The formula feels lightweight and easy to apply, and I love that it can target hard-to-reach areas depending on the format (spray or serum). 
Overall, this is a great body care product if you’re looking to brighten your skin, smooth texture, and get a healthy glow. Definitely worth trying!
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Reviewed in the United States on March 29, 2026
★★★★★ 5
Life saver for your skin
Set name: KOJIC
I was skeptical before buying this. my skin dries out so quickly and lotions is just a temporary fix for dry skin. I was amazed that the first time I used it all the dry skin was peeling off such a simple solution. I’ll never be without it now you have to try it to believe it.
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Reviewed in the United States on May 29, 2026