UVC Light Test Card with UVC Light Wavelength Indicator and Photochromic UV Intensity Test

This helped me a lot in determining good anti-sun exposure products from the bad ones!

works as expected

Bestens.

I bought this to test the UV claims of my ultrasonic cleaner and to see if the window above leaks UV. It worked very well and was worth the money for the piece of mind.

It’s smaller than I thought and reported it missing but found it later in the packaging. It is credit card size look out but looks good and works well

Seems to work well. I heard about these from a YouTuber, Big Clive, who uses them to qualify UVC germicidal lights. Purchased this one for the same reason, I had one I bought off eBay that claims to be UVC; it is NOT, but I would not have known this for sure without the card. A very valuable tool for ensuring safety!