This Humidity Indicator Card is a color-change indicator and is reversible as required by Military Specification MIL-I-8835.  It also meets MIL-P-116 Method II requirements.  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 chemical is no more harmful than table salt to humans. 

The current Military Standard, MS20003, dated 4 June 63, is approved by all Governmental Agencies, the Department of Defense and NATO for use in Method II packaging.  The MS20003-2 card meets this standard and is fully reversible.  NSN # 6685-00-752-8240.

Size: 2" w x 3" h