Find your RTLS technology

There isn't one that wins everywhere. The best RTLS is the one that meets your accuracy requirement in your building at a cost you can sustain. UWB suits work that needs sub-meter precision, BLE suits wide-area asset tracking on a budget, Wi-Fi suits sites that want to reuse existing access points, and passive RFID suits checkpoint and inventory workflows. Start with what you need to know (which room, which shelf, or which few centimeters) and let that narrow the technology before you compare vendors.

Ultra-wideband (UWB) is generally the most accurate for indoor tracking, typically sub 1 meter in a well-installed system. RTK GPS reaches centimeter level outdoors. BLE is usually good for 1 to 3 meters, and Wi-Fi for room or few-meter accuracy. Vendor figures are usually best-case, so ask for results measured in a site like yours.

UWB is more accurate and updates faster, which matters for safety, automation and tool tracking. BLE tags are cheaper, last longer on a battery, and work with phones and existing gateways, which makes BLE the more practical choice for tracking large numbers of assets where room-level accuracy is enough. Neither is better in general: it comes down to whether you need to pay for precision you will actually use.

RFID is a technology for identifying tagged items when they pass a reader. RTLS is the broader system that keeps track of where things are over time. Active RFID can be used to build an RTLS, but passive RFID mostly tells you that an item passed a particular point, not where it is now. Many sites combine the two: RFID at doors and dock gates, and RTLS inside the facility.

Yes. UWB, BLE, active RFID and ultrasound systems each use their own tags and infrastructure, so they don't depend on Wi-Fi to work out location. The system still needs a network connection, usually wired Ethernet or cellular, to send data from readers or gateways to the location software. Wi-Fi-based RTLS is the exception, since it locates devices using your existing wireless access points.

It ranges from room-level to sub-meter, depending on the technology. Roughly: UWB sub 1 m, BLE 1 to 3 m, Wi-Fi 3 to 10 m, and passive RFID at the zone or checkpoint level. Metal shelving, machinery, liquids, and the layout of the building all affect real-world results, so a pilot in your own environment is the only reliable test.

It varies widely, and the tags are rarely the biggest part. BLE tags cost a few dollars each and UWB tags cost noticeably more, but the infrastructure (anchors or gateways, cabling, installation), software licensing, battery replacement and ongoing support often add up to more over the life of the system. When comparing quotes, ask for the total cost over three to five years rather than the hardware price alone.

Healthcare (equipment, staff and patient flow), manufacturing (tools, work-in-process and worker safety), warehousing and logistics (inventory, forklifts and yard management), construction, mining, retail, and airports all use RTLS. The common thread is a costly problem that comes from not knowing where something or someone is: lost equipment, idle time, safety risk, or slow workflows.

Decide your accuracy, coverage and integration needs first, then shortlist vendors that support the right technology. Ask how they validate accuracy on site, what a site survey covers, how the system handles metal and interference, what integrations and APIs are included, who owns the location data, and what support terms apply. Then run a proof of concept with clear success criteria in a representative area before you commit to a full rollout.