Wallet-sized, reusable test cards that show in 15 seconds whether a UV light really gives off germicidal UVC, and roughly how strong it is. No batteries, no meter.
Questions about QuantaDose? Call(727) 888-5656and talk with our AI assistant any time.
Online marketplaces are full of UV lights sold as germicidal that give off no UVC at all. QuantaDose was created as a consumer's front-line defense: put the card under the light, and real UVC makes the letters UV-C glow green. If nothing glows, you have your answer.
Wow - I had 3 different UVC lights for sanitizing and only 1 is worth the money - the other two have no UVC!...
Hold the card under the light for about 15 seconds. Distance matters: double the distance and only about a quarter of the UVC remains. Wear proper safety equipment to protect your eyes and skin. Can't see inside a sanitizer box? Put your phone in next to the card recording video, then check the recording for the green UV-C.
A special ink glows green only under germicidal UVC, not visible light, UVA or UVB. Read it while the light is on, because the glow stops instantly.
Check the photochromic area right away. If ULTRAVIOLET is legible (1st/2nd) or the UV letters stay in the 6-in-1 center circle, UVC is above about 300 µW/cm².
The 1st and 2nd Edition are QuantaDose's 3-in-1 cards. The 3rd Edition is the 6-in-1.
| 1st Edition | 2nd Edition | 3rd Edition 6-in-1 | |
|---|---|---|---|
| Green UV-C germicidal indicator | ● | ● | ● |
| Intensity ≈300 µW/cm² check | ULTRAVIOLET word | ULTRAVIOLET word | UV letters in center circle (254 nm) |
| Wide-band photochromic strip | ● | ● UVC/UVGI + UVA/UVB scales | ● Shortwave + Longwave scales |
| Dedicated longwave UVA/UVB glow (red-pink) | – | – | ● |
| Far-UVC beam detector (back) | – | – | ● |
| Built for high-power UVC | – | UV-resilient PVC | not stated |
| Batch numbers | – | ● | not stated |
| Price | 1st Edition card: $11.11 2nd Edition card: $12.10 1st + 2nd Edition 2-pack: $15.00 Light Detective Kit: $19.98 1st Edition card: $8.88 2nd Edition card: $8.88 3rd Edition 6-in-1 card: $8.88 Prices can change; check the store for the current price. Questions about QuantaDose? Call(727) 888-5656and talk with our AI assistant any time. | ||
Find out if the "UVC" device you bought really emits germicidal UVC.
source: product pageVerbatim excerpts from Amazon reviews across all three cards, as Amazon displays them in each listing's "Customers say" section.
Wow - I had 3 different UVC lights for sanitizing and only 1 is worth the money - the other two have no UVC!...
...Returned the bogus machine to Amazon. UV card saved my wallet a $100 and me from getting complacent in the safety department.
This UV test card differentiated true and fake UVC disinfection devices instantly by checking the presence of shortwave UVC or deep UV....
Very useful for determining if a germicidal bulb in question does in fact emit UV-C! 👍👍
Simple and accurate, helps to see what UV lights are real, and who is just trying to make a quick buck.
I was looking for an inexpensive way to compare the effectiveness of low cost UVC sterilization products and this is it!...
...To my surprise, I found that my Rayban glasses offered almost zero UV protection. Great investment for the peace of mind.
Quick convenient way to check UV-C effectiveness. No problems. No lingering doubts. Life is good!
...A great alternative to very expensive digital UV light meters.
Quotes are exact; the ellipses (…) are Amazon's excerpt marks. Amazon lists these excerpts as positive. The star figure shown is the listing's average rating (checked Nov 4, 2026), because Amazon only shows individual review ratings to signed-in shoppers.
Sleeve storage and ">500 tests" come from the 6-in-1 Amazon listing. The sunlight guidance comes from Quanta X Technology.
On the 6-in-1, the same test area glows reddish-pink for UVA/UVB and green for UVC, while a separate photochromic strip turns purple to show intensity.