A radio frequency identification tag assembly is disclosed, including: a conductive radiation medium, the conductive radiation medium including a first portion and a second portion, with a gap between the first portion and the second portion; a thin film antenna, the thin film antenna including a PCB and metal conductive wires extending in different directions from two sides of the PCB; an insulating attachment member spacing apart the conductive radiation medium and the thin film antenna.

A wireless sensor device includes a flexible substrate, a cover layer on the flexible substrate, a device layer between the flexible substrate and the cover layer, and a printed circuit board connecting components of the device layer including an electrostatic discharge protected port for connecting an external sensor probe to the wireless sensor device. The device layer includes a processor, a memory, a battery, a first wireless communication system, and one or more onboard sensors; and a printed circuit board connecting components of the device layer comprising an electrostatic discharge protected port for connecting an external sensor probe to the wireless sensor device. The external probe allows for the wireless sensor device to perform sensor readings in environments that are too extreme or hostile to the wireless sensor device, while the wireless sensor device is safely isolated from the extreme or hostile environment.