For example, to monitor
temperature within a refrigerated truck, you would need semi-passive or active
tags with temperature sensors. To monitor security and integrity of a shipping
container, an active tag with an intrusion sensor may be used. A reusable tote or
plastic container used in a manufacturing or food-processing plant may be fitted
with a semi-passive tag. Since these totes and containers re-circulate inside
the plant, the cost of the tag is not a major concern.