Humidity Indicator Cards


Humonitor® Humidity Indicator Cards tell at a glance if moisture within sealed containers or closed spaces is at an acceptable level. Cobalt-free Humonitor® cards do not contain heavy metals. Humonitor® cards help monitor desiccant activity and are ideal for use with desiccants in any application where moisture control is critical. Any color change from blue to pink (cobalt cards) or brown to green (cobalt-free cards) indicates an unsealed container and/or damaging level of humidity.

  • Electronics packaging
  • Optical instrument packaging
  • Preservation packaging of sensitive components
  • Bulk packaging

  • Easy to use and read for fast monitoring
  • Wide range of indicating materials available which change colors at a variety of relative humidities - 5 to 60%
  • Sensitive indicating element calibrated for permanent accuracy to ±5% of relative humidity
  • Cards can be custom designed for your specific needs


Multisorb Technologies practices a policy of continuous improvement, therefore we reserve the right to discontinue or change specifications, designs or materials, without notice, consistent with sound engineering principles and modern practices.