Use our Humidity Indicator Strips to determine the humidity levels (or relative humidity, “RH”) in a contained environment. Each pack contains 10 humidity-indicator cards, and each card will read RH from 10%-60%. Simply place a single card in the area to be read and wait for the indicator dots to turn bright blue in order to determine the humidity levels in that area.

Each pack contains 10 Humidity Indicator Strips.
Master Case contains 36 packs.