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

I have several UVC sanitizing wands. The LED wand I bought that advertised itself as UVC has no UVC but strong UVB. No sanitizing from that one. The latest folding UVC led wand ( from Amazon ) has a strong UVC output and effectively killed off Trichoderma in my contaminated mushroom cultures and the green contamination on some cheese in my refrigerator. An olded fluorescent uvc wand I purchased 5 years ago has UVC but the small bulb has a weak output. Great tool so you don't waste your time thinking you are sanitizing. Protective UV glasses block the monitor to assure you are wearing the correct safety wear. Would immediately re-purchase if lost

bought this to use to test if some LED lights i had laying around emitted any UVC light that would mess with my resin 3 to printer's prints. works really well and now i keep it in my wallet and occasionally play with it, seeing what does and doesnt have UV.

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

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 🤣🤣🤣.)

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.

Easy to use and durable.

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.

This is good for detecting the presence of UV-C using the green fluorescent dye, but the purple photochromatic area responds to 320-400nm UVA/UVB (not UV-C) which your light source may not emit much of at all. Testing this with Philips TUV 4W FAM 4W (G4 T5) tubes, which are advertised to emit almost entirely 253.7nm UV-C, and only about 8% in the 320-400nm UVA/UVB reaction range of the purple dye, all according to the Phillips spec sheet, I get almost no reaction from the purple dye. The purple photochromatic dye obviously works in the 320-400nm UVA/UVB range though because I get a very dramatic immediate reaction in direct sunlight. So my conclusion is that this will tell you that you have UV-C, but it won't help you quantify the intensity of it. Thus light sources that are perfectly fine will appear to "fail" simply because their spectral power distribution curve is too narrowly spiked in the UV-C range and not wide enough to also produce a large enough amount of UV-A and UV-B. The only way to really test germicidal lamps though is with bacterial cultures because the germicidal function is not just the intensity of the light source, but also the exposure time and the "penetration" of the light into cavities on UV-C opaque surfaces, the amount of light reflected off of the inside of reflective boxes that actually reaches a surface, and other complicated real-world factors. That's the main problem with UV-C disinfection at the moment. A lot more testing is needed to determine what sort of sanitizer box/cabinet designs work and how well.

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.

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).

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.

Not much to say 5/5 It works it's small and can be used for multiple items, sunglasses, uv lights, antigerm uv c, etc.. Just one precaution, keep it in an envelope to keep it out of scratches and light and it will last much longer Cheerios