Observed arrival · 2026-11-07
QuantaDose’s UVC test cards
QuantaDose sells reusable cards intended to indicate whether a UV light emits germicidal UVC and roughly how strong it is.
- For
- People checking consumer UV lights and sanitizers
- Worth noticing
- The instructions say to check the green indicator while the light is on; the glow stops when the light is off.
Field notes
The instructions call for a roughly 15-second exposure and an immediate reading: the green indicator is meant to be checked while the light is on, while the photochromic intensity area is read right away. For enclosed sanitizers, the page suggests placing a phone and card inside and reviewing a recording; it also warns that distance reduces UVC and advises eye and skin protection. The three versions differ in materials and coverage, with batch numbers listed for the 2nd Edition.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue