Zebra Technologies Corporation

Deniz Boyu

Brian S Huffman

Mohannad Abdo

Gene A Hofer

Thi N Do

A temperature exposure indicator includes a substrate, a first electrode and a second electrode on the substrate, the second electrode spaced apart from the first electrode, a temperature responsive material disposed between the first electrode and the second electrode, wherein the temperature responsive material comprises an insulating material and conductive particles, and an absorbent coupled to the temperature responsive material. In response to exposure to a temperature above a predetermined threshold temperature, at least a portion of the insulating material of the temperature responsive material is absorbed into the absorbent coupled to the temperature responsive material, changing an electrical property of the temperature responsive material.

Orientation-independent temperature sensor

An RFID tag system includes an antenna, an integrated circuit electrically connected to the antenna, and a humidity or gas indicator being electrically connected to the antenna and the integrated circuit. The humidity or gas indicator includes a first electrode, a second electrode, a dielectric material, and a gap between the first electrode and the second electrode. At least a portion of the gap contains the dielectric material. The dielectric material is configured to have a change in its dielectric constant responsive to exposure to an environmental stimulus, which may be at least one of humidity or the presence of a gas. The change in the dielectric constant of the dielectric material changes a capacitance of the humidity or gas indicator, causing the integrated circuit to indicate the presence of the environmental stimulus.

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Dover, NJ, United States of America

Deniz Boyu