Abstract: A support includes a base having an outwardly extending projection with a passageway therethrough, and having a tag receiving portion configured to removably support a tag on the base adjacent one end of the passageway. A different arrangement involves a tag that includes a housing having an opening therethrough and having an annular surface around the opening, an annular gasket engaging the annular surface, and circuitry within the housing having a sensor located in the region of the opening and having a transmitter that can transmit wireless signals. A method includes defining a passageway that provides fluid communication between an interior and exterior of a container, supporting a tag on the exterior of the container, and causing the tag to sense, at a location in the region of an end of the passageway, a condition within the container.

Abstract: A device has a support that can resiliently and removably grip an edge portion of a member with first and second portions thereof disposed on opposite sides of the member. A further portion on the first portion can operatively couple sensing structure to an electrical conductor portion on the third portion. A different embodiment has a support that can resiliently and removably grip an edge portion of a member with first and second portions thereof disposed on opposite sides of the member. A further portion on the support has circuitry coupled to a wireless communication portion on the first portion. Another embodiment has a support with structure supported thereon, the support resiliently and removably gripping the edge portion of a movable door with first and second portions of the support disposed on opposite sides of the edge portion.