P/N 24878527694 is AGM's most popular 30-40-50% Reversible Humidity Indicator Card and can be used in almost any industry. This card is a color-change indicator and is reversible as required by Military Specification MIL-I-8835. As the humidity increases, the chemically impregnated spots change from a blue color (DRY), through a lavender, to a pink color (HUMID). As the humidity decreases, the spots change from a pink color (HUMID), through a lavender, back to a blue color (DRY).
Each of these cards is accurate to ±5% relative humidity (RH) at 75°F (24°C). Other humidity combinations are available by special order.
NOTE: This card has been impregnated with a chemical that may cause corrosion of some metals; therefore, AGM recommends that the card not be placed in direct contact with metal objects.
The current Military Standard, MIL-I-8835, dated 4 June 63, is approved by all Governmental Agencies, the Department of Defense and NATO for use in Method II packaging. P/N 24878527694 card meets this standard and is fully reversible. It is functionally equivalent to the MS20003-2 humidity indicator card, but has slightly different dimensional tolerances.