Abstract: A sensor pod includes a housing defining an interior cavity; a fixture configured to attach the housing to a surface; an infrared sensor in the cavity configured to monitor infrared light through a first port in the housing; and a monitoring system disposed in the interior cavity and configured to receive a signal from the infrared sensor and determine whether the housing has been detached from the surface based on the signal, and to generate an alert signal when the housing is determined to have been detached from the surface.

Abstract: Systems, apparatus, and methods disclosed herein feature a housing defining an interior cavity, a flexible cable including an electrically conductive body extending from a first end to a second end, at least a portion of the first and second ends of the cable configured to be held within the interior cavity, a locking assembly disposed in the interior cavity and configured to secure the cable to the housing, an electrical circuit disposed in the interior cavity, and a monitoring sub-system disposed within the interior cavity and configured to monitor an electrical state of the cable.

Abstract: In some implementations, a container monitoring device can include an electrically conductive cable for securing the doors of a shipping container. The container monitoring device can transmit a signal through the cable and detect when the cable has been cut or tampered with based on the transmitted signal. In some implementations, the conductive cable can be reused to secure the doors of the shipping container after the cable has been cut. In some implementations, the container monitoring device can wirelessly communicate with one or more sensor pods located inside the shipping container. The sensor pods can include various environmental sensors configured to take measurements of environmental conditions within the shipping container. The sensor pods can transmit the sensor measurements to the container monitoring device and the container monitoring device can report the sensor measurements to a server for review by a user.