2nd Gen QuantaDose® Reusable UVC Light Test Card with UV Intensity Strip Sensitive to UVA/UVB/UVC Light

I got this to determine if sunglasses (and other eyewear) actually delivers purported UV protection. The card works great. I merely covered the UV sensitive areas with the lens, and exposed it to sunlight. Quickly remove the sunglasses and check if the area is still white. You have to be quick, because the ambient UV light will affect the sensitive rectangular spaces. I am happy to report that the glasses I tested did indeed have UV protection. Even a pair of reading glasses offered UV protection. (The lens doesn't have to have dark tint to possess UV protection.) I wish the card came with a case/sheath, for protection. Otherwise, it functions exactly as expected. Great assessment tool. 4.75+ stars with a very high level recommendation.

Quick convenient way to check UV-C effectiveness. No problems. No lingering doubts. Life is good!

The little experience I have with these reusable card UV detectors, this one works best for UV-A. It fades fast, but registers better than the other QuantaDose reusable card in the photo. Both luminesce under the UV light, but only this one retains it for a few seconds after the UV is shut off.

If you are like me and want to be a discerning consumer, you will enjoy the product. 🫶 Short story: awesome, wicked cheap, you get quick/repeatable results - well worth your investment if you have to test (or cannot resist not knowing) whether your UV light product will cure resin, or kill germs, or do nothing (and it’s just a blue “Violet” light). Shine the card in the light, if the first part turns green (while under the light), you’ve got germicidal grade UV light. My photo is not that great cuz it is harder to see the green glow with the camera - but you can with the naked eye. Second part of the card will tell you how strong of UV light you have if you have any. One draw back is you can’t tell between the UVB or UVA. Longer story: I’ve been working with UV resin a lot, so like a moth, I was drawn towards UV light products. Then I noticed not all UV light products cured my resin the same… what?!?! There are 3 bands!?! Which are (overly simplified as): UVA (315-400 nm) - used for tanning, parties, resin work UVB (280-315 nm) - can cause aging, wrinkling, cancer - good for some pet lizards UVC (100-280 nm) - zaps germs and many other living organisms Please please please do your due diligence with UV light research… there is more info is out there. And once you do, you can use this lovely card to determine a rough cut yes/no of what you are wielding with said UV light product. It beats the snot out of a UV detector or UV meter that gives you exact wavelengths. Most of those devices run three digit$ as a starting price point, or are limited to only one band. So you could… get 20+ of these… or one of those. With this product (which is 3% of the cost of a metered instrument and requires no batteries 🫶…) I’ve tested a make up brush cleaner (which did not disinfect😱), a water pick (which did disinfect the water reservoir 🙌 that’s it in the photo), bug zappers (the attracting light is UVA, the zaps are electrical currents), the nail curing light, black lights, UV flashlights, and Christmas lights 🫶 (the last of which, thank goodness, did not register at all in the UV spectrum 🤣🤣🤣.)

Works great. The UVC is nice and bright when illuminated with my fluroecent UV bulb for a rock light. I'm keeping it in the enclosure to be sure the light is on/off.

What I liked about the card is how easy it is to use, that it's sturdy and small (like a store or credit card), and easy to take along on a walk. I initially used it to test different articles of clothing, hats and sun umbrellas to see if they blocked or reduced UV exposure, especially those not UPF rated. I noticed the color displays quickly uncovered, then takes a few seconds to reset to get a new reading when covered. I was please to find many non-rated fabrics provided protection. Watching the videos explaining the use of the card made it easy to use the card when it arrived.

Without knowing it, back in 2020, I had purchased a counterfiet UVC germicidal corn-cob LED bulb here on Amazon for $75. I used it for ~2 years thinking it was disinfecting masks, gloves and the occasional hotel room. Turns out it produces no UV light whatsoever and the only way I could have known that is with a product like this. It also turns out there is no shortage of flim-flam people out there willing to knowingly sell garbage but lie about its features and exploit people to make a buck. As an aside, in general, if you are in the US, I would NOT PURCHASE any germicidal UV light product here on Amazon. Amazon does not expend the resources necessary to prevent sellers from duping its customers with fakes. The Quantadose tool is an essential tool to help customers know if they are being duped. The UVC germicidal lamp product I ultimately found here in the US and liked is the "Cleanaire 15 in. Portable UV-C Disinfecting Work Light with Motion Sensors Adjustable Timer Alert Warning Function" which I found at HomeDepot for ~$100.

The instructions say to leave while lights are on. That's the only problem.

Works very well.

Niche product but it allowed me to determine that I inadvertently bought a counterfeit pair of sunglasses as they did not filter any UV.

N'indique aucun uvc alors que j'ai des tubes désinfectants uvc , produit défectueux ou faux; ne pas acheter. Produit detiné à vérifier l'effet des uvc en professionnel (cabinet dentaire).

Works very well. I just put the card directly under the sun and it turned purpose right away. When i put it on my dashboard, it didn't turn purple that much. However, when I'm inside a store behind the glass window, it also turn purple. At last, I tried it on my sunglasses and it only turn half purple where the part covered by my sunglasses was white. Not sure how reliable is the sensitivity, but from my non-professional test, it works really well! However, it is a bit expensive for what it does on a card.

This works exactly how it was described. I bought this for my various art projects when I was using UV light to test whether the glasses I have were protecting me. I have tested this with UV light in the sun and it does change colour too. It is in fact so good, that it even changed colours when there was low light, with no visible sun around, to prove that we still have UV rays streaming down. Definitely recommend getting this.