A full line of humidity indicator plugs for monitoring the inside of containers to protect electronics, optics or other moisture sensitive contents is available from Sphinx Adsorbents, Inc. of Springfield, MA. Sphinx Humidity Indicators provide a visual indication of humidity levels inside a rigid or flexible container, without breaking the seal, and are ideal for use where the preservation of container contents is critical. Featuring color-change elements that turn from blue to pink as humidity (RH) increases inside the container, they are available in several shapes and sizes for detecting moisture from 5 to 95% RH and meet MIL-I-26860. Suitable for installation on metal containers, fiber drums, and vapor-proof bags, Sphinx Humidity Indicators are available with reversible color-change cards which are accurate to within ±5%, or maximum color-stain elements that are irreversible and warn that certain RH levels have been exceeded. Applications include packaging, long-term storage, and dry chamber maintenance.
Sphinx Humidity Indicators are priced according to configuration and quantity. Literature and price quotations are available upon request.