Updated October 21, 2026 · by Guillaume Pelletier, Embedded Systems Engineer, InVirtus Technologies
Less time spent searching for tools, automated inventories, and a live view of where every piece of equipment is: that is what Bluetooth Low Energy delivers in a plant, a maintenance hangar or a hospital. Tags stuck on the assets, lasting 5 years without maintenance or running on ambient light, replace walk-arounds and manual stock counts.
Bluetooth Low Energy (BLE) is a version of Bluetooth designed to send small packets of data while using very little energy. Introduced with Bluetooth 4.0, it operates in the 2.4 GHz band on 40 channels of 2 MHz, 3 of which are reserved for broadcasting (advertising). That is why a beacon can run for several years on one battery, or with no battery at all on ambient light.
At InVirtus, we design BLE beacons and the platform that locates them in factories, hospitals and aerospace workshops, from our base in Nantes, France. This guide gives the figures we measure in the field, not only the ones in the specification.
Key takeaways
In one sentence: Classic Bluetooth keeps a continuous connection to carry a stream (audio, files), while BLE wakes up for a few milliseconds to send a packet, then goes back to sleep.
| Criterion | Classic Bluetooth (BR/EDR) | BLE 4.x | BLE 5.x and later |
|---|---|---|---|
| Typical use | Headsets, speakers, file transfer | Sensors, beacons, connected devices | Industrial beacons, positioning, long range |
| Radio data rate | Up to 3 Mbit/s (EDR) | 1 Mbit/s | 1 Mbit/s, ~2 Mbit/s (LE 2M), 500 or 125 kbit/s (LE Coded) |
| Communication mode | Permanent connection, pairing required | Connectionless broadcast or short connection | Same, plus extended advertising |
| Channels | 1 MHz wide | 40 channels of 2 MHz, 3 for advertising (37, 38, 39) | Same |
| Typical beacon battery life | Not suited to beacons | Several months to several years | Several years on battery, or battery-free (solar cell) |
| Fine positioning | No | Signal strength (RSSI) | AoA since 5.1 (< 30 cm), Channel Sounding since 6.0 |
| Compatibility | Not compatible with BLE (except dual-mode chips) | — | Backward compatible with BLE 4.x |
The extra range of LE Coded comes from redundant coding: each bit is repeated over 2 or 8 symbols, which gains 4 to 6 dB of sensitivity and 1.5 to 2 times the range of 1M mode according to Silicon Labs (source).
In raw data rate, yes; in responsiveness, no. A BLE beacon sends a few dozen bytes every 1 to 5 seconds, so data rate is never the bottleneck. What matters in industry is how often the beacon transmits and how much power it draws.
Wi-Fi carries a lot of data but drains a battery in a few days. BLE carries little data but lasts for years. To tag hundreds of tools, carts or medical devices, BLE is the only one of the two that stays affordable per unit.
A BLE device spends most of its time asleep. It works in two modes, which can be combined.
A broadcasting beacon can be read by anyone, and sometimes reconfigured. On sensitive sites, we disable connectable mode after installation, lock the configuration and remove "Just Works" pairing. This is what we do on lone-worker protection projects in the nuclear industry.
In open space, an industrial BLE beacon reaches 50 to 120 m (165 to 400 ft); in a factory, expect 10 to 30 m (30 to 100 ft) between two metal shelving units. The standard does not set a range: it depends on transmit power, the receiver antenna and above all the environment.
| InVirtus model | Stated range (open space) | Battery life | Power |
|---|---|---|---|
| ivBeacon Lite | up to 120 m (400 ft) | 5 years (one transmission every 4 s) | Replaceable CR2477 1,000 mAh coin cell |
| ivBeacon Micro | up to 70 m (230 ft) at 0 dBm | 5 years | 220 mAh battery |
| ivBeacon EosFlex | up to 50 m (165 ft) at 0 dBm | Battery-free: organic solar cell, works from 30 lux | Ambient light |
To know which zone an asset is in, short range is often more useful than long range. In a bus depot, we set under-chassis beacons to 1 m (3 ft) range to detect only the passage through a washing station.
Battery life depends first on the transmission interval: the beacon draws most of its power while transmitting, so spacing out transmissions directly extends its life. Our battery-powered beacons last 5 years at one transmission every 4 seconds. One option removes the question entirely: the battery-free EosFlex beacon recharges from the light of a workshop or an office.
A BLE beacon is located through the receiver that picks it up: the beacon computes nothing, it broadcasts its identifier, and the platform works out its position.
| Method | Accuracy | Infrastructure | Typical use |
|---|---|---|---|
| Zone presence (RSSI) | The room or zone of the receiver | 1 gateway or anchor per zone | Automated inventory, tools, medical devices |
| Mobile in the field | A few meters around the operator | None: the smartphone is the receiver | Finding an asset, patrols, lone workers |
| Angle of arrival (AoA) | Under 30 cm (1 ft) | AoA anchors on the ceiling | Real-time tracking of parts or work in progress |
Since Bluetooth 6.0, Channel Sounding measures the distance between two BLE devices directly: through the phase of the signal across several frequencies, cross-checked with the round-trip time of a packet. The Bluetooth SIG targets accuracy of a few tens of centimeters, even without line of sight (source). Where AoA needs anchors fitted with antenna arrays on the ceiling, Channel Sounding works between two standard BLE devices: fine accuracy without heavy infrastructure. Our next beacon, the ivBeacon Hybrid, will support it.
The InVirtus platform shows assets on building floor plans, floor by floor, and on a map outdoors. It keeps the inventory of each zone, triggers alerts (low or high threshold in a zone, disconnected anchor, upcoming calibration date), stores the history and pushes data to the ERP or CMMS through a REST API, webhooks or scheduled exports. The mobile app finds a beacon with a proximity radar and makes it beep.
UWB locates to within a few tens of centimeters continuously, but needs a dense network of powered anchors and more power-hungry tags: it is worth it to track moving parts second by second. Passive RFID costs a few cents per tag, but only sees an object when it passes a reader. BLE sits in between: a continuous position at zone level, or under 30 cm with AoA, with low-cost beacons that last 5 years and battery-powered receivers. For inventory and finding equipment, it offers the best cost-to-accuracy ratio.
BLE is mainly used to know where assets that move around inside a site are, without scanning them by hand. Four use cases we deploy today:
| Industry | What is tracked | Deployed volume | What changes |
|---|---|---|---|
| Aerospace and defense | Measuring instruments, tooling, work orders across several floors | 1,000 to 10,000 items per site | Goal: no more tool searches before inspections |
| Nuclear | Instruments and equipment in controlled areas | 1,500 instruments | Goal: less time spent searching in controlled areas, real-time inventory |
| Public transit | Buses in a two-level depot, washing station passages | 74 vehicles in the pilot | Bus positions without walking the depot; only 1 anchor and 1 beacon damaged in 8 months |
| Healthcare | Medical devices, wristbands | Pilot with 80 beacons and 12 readers | Goal: locate a medical device without searching for it |
Customer names are deliberately omitted; the figures come from our deployments.
BLE stands for Bluetooth Low Energy, sometimes written Bluetooth LE or Bluetooth Smart. It is the low-power part of the Bluetooth standard, introduced with version 4.0.
No. They share the name and the 2.4 GHz band, but not the radio protocol. A Classic Bluetooth headset cannot talk to a BLE beacon; most recent smartphones support both.
In open space, our beacons reach 50 to 120 m (165 to 400 ft); LE Coded mode can multiply the range of standard mode. Inside a building, plan one receiver every 10 to 30 m (30 to 100 ft) depending on the amount of metal.
Yes. All recent Android and iOS smartphones read BLE packets. That is what makes it possible to locate an asset, or a person, without installing gateways everywhere.
Yes, if it harvests energy elsewhere. Our EosFlex beacon uses an organic solar cell and works from 30 lux, the lighting level of a corridor.
A broadcast packet can be read by anyone: it should only contain an identifier, never sensitive data. Security depends on the beacon configuration (locking, changeable keys) and on the platform (AES-256 encryption, HTTPS, role-based access).
BLE locates continuously at zone level, or within 30 cm with AoA. UWB targets decimeter accuracy but needs more anchors and more power. Passive RFID costs almost nothing per tag but can only be read when it passes a reader.
Want to know where your equipment is without searching for it? We size your site (number of beacons, receivers, required accuracy) in a 30-minute call. Request a site assessment
Learn more: Discover our industrial BLE beacons
