Cargo containers are employing various levels of wireless-ready sensing technology. This example from the NY Times shows how a magnetic sensor can determine if the door on the container has been opened. The door sensor is cheaper and smaller than other RFID technologies, but can still be read from a distance using handheld or dockside readers. Stormy seas and flexing of container walls made other door-sensing technologies give false-positives. The story also covers other technologies and mentions that standardization is still needed.
This niche blog has now been merged into the The Wireless Report (www.thewirelessreport.com), which covers all things wireless.
