Humidity Indicator Cards
Simple and Inexpensive Method to Monitor Humidity in Shipping and Storage Containers
Available in several configurations, cards indicate relative humidity as low as 5 percent and as high as 95 percent, depending on the application and need.
Available in reversible and irreversible configurations.
Maximum Humidity Indicator Cards:
Designed to indicate the highest relative humidity level to which goods have been exposed. Blue crystals in each rated indicator window dissolve when exposed to the rated RH for 24 or more hours. The highest percentage spot containing dissolved solids indicates the maximum humidity reached.
Reversible Humidity Indicator Cards:
Reversible Indicators work much like a thermometer, fluctuating to indicate the current relative humidity level, as indicated by a lavender color. Spots change from blue (dry) to pink (humid) as relative humidity changes. Spots will change within eight hours of being exposed to a change in relative humidity and turn back from pink to blue when the volume of air is dried.
>> Show Product Specifications
|Humidity Indicator Specifications
||Material to ship in appropriate protective packaging
||See item specification
Store container in a cool, dry environment to maximize shelf life. Indicators must be stored in the original sealed container until used. Replace desiccant periodically after container is opened. Keep away from ammonia gases which render the indicators useless. Do not open individual bags until ready to use.
|Color Change Material
||Proprietary humidity sensing compound. Avoid direct contact with metals. May cause corrosion.
||Cardstock or blotter paper with identifying text, packed in bags or sealed cans
|Humidity Indicator Cards - Irreverisble Maximum
||4 1/2 x 3 in
||4 1/2 x 4 1/2 in
Reversible 10 to 100%
|Humidity Indicator Cards - Reverisble Current %RH
||1 9/16 x 4 3/4 in
||2 x 3 in
|Humidity Indicator Cards - Reversible Current %RH
||Art & Film Preservation
||1 1/2 x 4 1/4 in
||15 to 95%
||4 1/4 x 1 1/2in