6-in-1 QUANTADOSE® Multi-Wavelength Bi-Luminescent UVA/UVB/UVC/Far-UVC Light Reusable Professional UV Test Card

I purchased this to check my medical grade UVC sanitizer box. When the UVC didn't show after testing it in the sanitizer box I called the number on the back of the Quantadose card. The person I spoke to was a wealth of information. He explained how the card works and how to test for UVC. He said the UVC indicator disappears as soon as the sanitizer is open. He encouraged caution and protection and said I could place the card inside of the sanitizer with my phone on video record.I was able to verify UVC up to 254nm. The Quantadose representative was professional, educational and truthfully so nice. He said to call back anytime if I had more questions or needed help.

This little card can give you a good idea of the presense and strength of UV light, and also its approximate wavelength.For me, the greatest feature is the ability to quickly detect the presense of UV-C band light. You'll often see "germ sterilizing" UV wands advertized on Amazon, but how do you know they really are putting out UV-C band light? UV-A and UV-B bands won't do the job. I'm happy to say that a UV wand I bought on Amazon passed the test. You'll see some reviews of UV wands that don't pass this test, and should be avoided.A great alternative to very expensive digital UV light meters.

Really nice to know when exposure to UV is high. I also use this to test the accuracy of some UPF clothing. Turns out, you need to be careful; even if a shirt claims to be UPF 30-50+, some are not and cause this card to still glow in the sun.

Seems simple enough—pull out the card and let light shine on it, but without going to the website and scrolling through the sample images, a person that only occasionally uses the card (probably most people) won't know how to interpret the findings. Even with going to the website, there are still too many unanswered questions.It would be nice to have the sample images from the website printed on the back along with the existing QR code for more details. Even better would be to also add explanatory text on the front. For instance, what do the different shades of purple and green mean—intensity?—strongest wavelength? And when they appear in the outer ring, is that good or bad? Are there numerical values associated with the shades or rings, and if so, why are they not printed somewhere? And in the middle section, there is a key for shortwave/longwave with shades of gray. Where do those shades of gray appear?—is one the text color and the other the background?—does it only show one or the other shortwave/longwave at a time?—which one takes priority if both wavelengths are present?

I don't have any other equipment or knowledge to back it up, but seems to be legit. Bought to check if UV-C bulbs for air sanitizers I bought here on amazon also were fake (they weren't, according to this). They react to the UV bulbs, but not other lights.

This doesn't register a 55W UV-A HVAC sterilization bulb from 12" away. So it's frustratingly not sensitive enough to just place somewhere in the serilization container to test the bulb. It must be placed right next to the bulb to register the slightest amount of change.Maybe it's only for medical-grade sterilization devices? Or maybe my bulb is defective and this meter is showing that its radiation level isn't effective?The 2nd Gen QuantaDose card also sold here is more sensitive (at least 2x more).But both of them fade rapidly. It's half-life appears to be 2-3s.After 5 minutes of exposure, it fades completely within 5 seconds!As UV radiation is dangerous, I thought it best to close this card off in the enclusre with the bulb. But that makes it difficult to get it open in time to read it. So even leaving the enclosure open shows that this card is difficult to get to even begin to glow purple.I prefer the 2nd Gen QuantaDose, since it's slightly more sensitive to UV: https://www.amazon.com/dp/B08KZZ54BZ