Unique humidity card indicates both the current humidity and the maximum humidity attained. Easy-to-read cards are ideal for use with bottles, chemicals, plastic bags, electronics, desiccators, and storage and shipping containers. Current range is 0 to 100% relative humidity. Readable to an accuracy of ±5% RH at 75°F (24°C). Maximum range is 50 to 90% RH. Maximum indicator is nonreversible. Readable to an accuracy of ±5% RH at 75°F (24°C). Each card is individually sealed in a clear moisture-barrier bag with a Humidity Sponge desiccant to keep the card dry and provide for an extended shelf life. Card size is 4 x 4 inches. Pack of 6 cards.
