Depending on your tracking environment and how static or dynamic your inventory situation is, passive RFID may be a great option for you. Airlines, for example, use passive RFID to tag life vests with their expiration date. Instead of physically checking the plane for vests and manually confirming all the expiration dates —a process that could take over an hour on a large plane—employees can complete the check in just minutes with a handheld RFID scanner. That said, if you don’t have the ability to use either a chokepoint system or a handheld scanner for your inventory use case, passive RFID might not be the best option.

While passive RFID works well to confirm the presence of a tagged item in a specific room, it doesn’t tell you where an item is located. If you need this kind of functionality, there are plenty of passive RFID alternatives on the market today that could work very well for your specific use case. Below, we’ll examine four of those technologies you might want to consider.

Written by Brian Ray

Brian is the Founder and CTO of Link Labs. As the chief technical innovator and leader of the company, Brian has led the creation and deployment of a new type of ultra long-range, low-power wireless networking which is transforming the Internet of Things and M2M space.

Before starting Link Labs, Brian led a team at the Johns Hopkins University Applied Physics Lab that solved communications and geolocation problems for the national intelligence community. He was also the VP of Engineering at the network security company, Lookingglass, and served for eight years as a submarine officer in the U.S. Navy. He graduated from the U.S. Naval Academy and received his Master’s Degree from Oxford University.