RFID asset tracking: very often, this is all you need
Passive UHF RFID has no battery, costs very little per tagged item and reads hundreds of items as they pass a gate. What it does not do is put a moving dot on a floor plan. For many of the projects that arrive here asking for a real time location system, that is a limitation nobody would have noticed, and the budget difference is substantial. This page explains where the line is.
RFID is not one of our own products: the systems we build are the Bluetooth Beacon Tracker and the Sentinel Video Tracker. RFID we supply and integrate. Having no product of our own in RFID is why we can compare it honestly, including when the honest answer is a smaller project for us.
The problems RFID actually solves
These are operational problems, not technology problems. If you recognize three of them, RFID belongs on your shortlist before anything more expensive does.
Counting stock takes days and is wrong the moment it ends
Manual counting is slow, it is out of date as soon as the team moves on to the next aisle, and it misses whatever was in use that day. Reading tags in bulk turns a multi-day count into a pass with a reader.
You do not know what left the building, or when
Pallets, tools, returnable containers and rented equipment leave through a door and nobody records it. A reader on that door records every tagged item that crosses it, with a timestamp, without anyone scanning anything.
Goods receiving depends on someone scanning each barcode
A barcode needs line of sight and one item at a time. That is a person, a scanner and a queue. RFID reads items that are inside a carton or on a pallet, in bulk.
Shrinkage shows up only at the annual audit
If the first time you learn something is missing is at the inventory count, you have lost months of the trail. Passage events at gates tell you the day it happened.
Every item needs a tag, and tags on everything are expensive
With active tracking technologies, the cost per item is what stops the project. A passive RFID label has no battery and no electronics to maintain, which is what makes tagging tens of thousands of items realistic at all.
Three questions to answer before you buy anything
These decide whether RFID is enough. We go through them with you on the discovery call, and quite often the call ends with a recommendation that costs less than what you expected to spend.
1. Do your items pass through defined points?
Doors, gates, loading bays, production stations, a portal at the entrance of the stockroom. If the movements that matter cross a point you can name, RFID reads them there. If items drift anywhere across an open floor with no chokepoint, RFID has nothing to read them at.
2. Do you need to know where it is now, or where it went?
Where it went is a history of passage events, which is RFID. Where it is right now, continuously, on a map, is a positioning system, which is BLE, UWB or long-range. Be honest about which one your team will actually use every day.
3. How many items, and what are they worth each?
Tens of thousands of low-value, high-turnover items point strongly to passive RFID, because the cost per item decides the project. A few dozen expensive instruments that people spend an hour looking for point somewhere else entirely, because there the search time costs more than the tag.
How passive UHF RFID works
Three components and no batteries. The simplicity is the point: it is why the cost per tagged item is lower than any alternative on this site.
The tag
A passive label with an antenna and a chip. It has no battery and no power source of its own: it wakes up on the energy of the reader signal, sends back its identifier, then goes silent. Nothing to charge, nothing to replace, no battery to fail in a cold store.
The reader and antennas
Fixed readers with antennas at the points you choose, handhelds for stock counts, or both. Infrastructure exists only where you put it, which is what keeps the installation cost down compared with covering a whole floor.
The event, not the position
What the system produces is a record: this tag was seen by this reader at this time. That is an identity plus a place plus a moment. It is not a coordinate, and it does not update while the item sits still.
What it connects to
The value comes from what receives those events, normally your WMS, ERP or maintenance system. A tag read that does not update a record anywhere has changed nothing operationally.
Presence at a reader is not a position on a map
This is the single distinction that decides most projects, and it is the one that gets blurred in sales conversations. It is worth being blunt about it.
What presence gives you
A pallet was read at the shipping gate at 14:32. A tool was read leaving the crib at 08:05 and has not been read coming back. A trolley was read at the entrance of ward B. Each of these is a fact with a time attached, and for a lot of operations it is the whole requirement.
What presence does not give you
Between two reads, the item is nowhere. If it was taken off the route, dropped behind a rack or carried to a floor with no reader, the last event is all you have. The dashboard cannot show you a dot moving, because there is no dot.
Why RFID is often sold as location tracking anyway
If you put enough readers in enough places, passage events start to look like a rough path. That works at zone level and it is a legitimate design, but the cost of adding readers everywhere approaches the cost of a positioning system, without the benefits of one.
The practical test
Ask your team what they will do with the screen. If the answer is check whether it has left, or count what is in the area, RFID is enough. If the answer is walk over and pick it up, you need a position, which means BLE or better. See our indoor asset tracking page for what that looks like.
When RFID is not enough
We would rather lose the RFID sale than have you discover this after installation. These are the four cases where RFID is the wrong answer and we will recommend something else.
You need to find one item in a large area
A technician standing in the middle of a large warehouse asking where is trolley 14 will not be helped by a list of gate reads. This is the BLE case: our Bluetooth Beacon Tracker gives 1 to 3 meters in 90 percent of cases, with beacons that last years on their battery. It costs more per item, and it answers a question RFID cannot.
You need sub-meter precision or a reaction in under a second
Forklift anticollision, safety zones, machine and robot interaction. RFID reads an event when something passes, and our BLE system updates in the order of seconds. Neither is a safety interlock. That is the UWB case, and we will say so.
Physics is against you
Metal and liquids interfere with UHF read reliability, which matters for tools, metal cages, drums and anything wet. It is manageable with tag selection, tag placement and antenna design, but it is real, and it is discovered during the pilot rather than assumed away in a proposal.
The process will not change
RFID only records what passes a reader. If people carry items out through a side door, or the receiving team keeps typing into the same spreadsheet, the data will be clean and useless. Location technology never fixes an unowned process, it just documents it more precisely.
What it costs
Passive RFID has the lowest cost per tagged item of any technology we work with, because the tag has no battery. The cost sits in readers, antennas, installation and integration, not in the labels. Our minimum commitment for a project we run is USD 5,000, and if your case does not justify that we will tell you on the call rather than pad the scope.
How many read points
Every door, gate or station you want to cover is hardware plus cabling plus commissioning. The count of read points, not the size of the building, is what drives the infrastructure cost.
The number of items and the tag type
Standard labels on cartons are one thing, tags specified to work on metal or in harsh conditions are another. The physics of what you are tagging decides this, not the budget.
Where the tagging happens
Tagging at the supplier or at the point of manufacture is cheap. Tagging an existing stock of tens of thousands of items by hand, once, is a project in itself and is often the largest single line.
Integration
Connecting read events to your WMS, ERP or maintenance system is where the operational value appears. It is also the part most often left out of low quotes.
How we work
Four steps. The first is free, and it regularly ends with us recommending the smaller project.
01. Free 30-minute discovery call
We work through the three questions with you. If passage events are enough, we say so. If you do not need us at all, we say that too.
02. Site assessment
We look at where items actually move, where the chokepoints are, what they are made of and what systems the data has to land in. For any positioning component we also need a floor plan in scale.
03. Pilot
A limited, real deployment. For RFID the pilot is where tag choice and read reliability get tested against your actual materials, which is the only way to know. For BLE, at least 6 nodes covering roughly 300 square meters.
04. Rollout and integration
Full deployment and integration with your systems. Where the project includes our BLE system, that means a REST API, push callbacks and optional daily CSV files. The raw data is yours.
Frequently asked questions
Can RFID tell me where an item is on a map?
Not in the way a positioning system does. RFID tells you that a tagged item was read by a specific reader at a specific time. Between reads there is no position. With many readers you can get zone-level awareness, but if you need a dot that moves on a floor plan you need BLE, UWB or long-range positioning instead.
Do you supply the RFID hardware yourselves?
Yes. RFID is not a product we developed, the way our Bluetooth Beacon Tracker and our Sentinel Video Tracker are, but it is a technology we supply: we assess it, specify it against the alternatives, supply it and integrate it, and we run the project end to end. Not having built RFID ourselves is precisely what lets us compare it with the alternatives without a horse in the race. The specification for your site is settled on the discovery call, and the part you are really buying from us is the judgment about whether RFID is the right answer at all, plus the integration that makes the read events useful.
Will RFID work on metal tools and on liquids?
It needs care. Metal and liquids interfere with UHF reads, which is why on-metal tags, tag placement and antenna design exist. It is a solvable engineering problem in most cases, but it is the first thing we test in a pilot rather than something to assume. If a proposal does not mention it and your items are metal, ask why.
How much does an RFID tag cost?
Passive labels are the lowest cost per item of any technology on this site, by a wide margin, because there is no battery and no electronics to maintain. Specialized tags for metal or harsh environments cost more. We do not publish a figure per tag, because it moves with volume and with the tag specification your materials force on you, and a published figure would not survive contact with either. The more useful point is that on almost every project we see, the tags are not what decides the budget. Read points, the one-off labor of tagging existing stock, and integration are.
Can I start with RFID and add positioning later?
Yes, and it is a sensible sequence. Start with RFID where the chokepoints are, then add BLE coverage in the areas where searching is actually costing people time. The two datasets coexist: RFID owns passage events, BLE owns current position. Decide from the start which system is the source of truth for which question.
What is the minimum budget?
USD 5,000 is our minimum commitment for a project we run. A very small RFID installation can fall below that, and in that case the honest answer is that it does not need a project built around it, whoever supplies the hardware. We will say so on the discovery call rather than grow the scope until it clears the floor.
Talk to an engineer, not a salesperson
Tell us what you need to track, where it moves and what your team will do with the data. If RFID is enough, you will hear that first.