What is a ring scanner? The device, its mounts and its words

Time：2026-10-17 Views：0

A ring scanner is a barcode reader worn on a finger — an imaging window, an illuminator, a decoder, a cell and a radio in one small body — paired with a phone, a handheld computer or a wireless receiver. It is one of four wearable mount classes, and it covers labels near the fingertip rather than replacing a station reader.

In short:

A ring scanner wears the reader on one digit, so the scan axis follows the finger; EDOO's ring pages state weights of 18 g (AI1520), 35 g (R43), 38 g net (R41-21) and 40 g (R42).
The class splits into four mounts — finger ring, glove or back-of-hand, wrist-worn, and a handheld or PDA (rugged belt computer) as the hub — a mechanical decision, not a decoding one.
EDOO's October 2026 pages cover the ring and glove mounts; the wrist mount is vocabulary to source elsewhere, and the hub role falls to a separate host or to a glove unit running its own Android 14.0 system.
A wearable barcode reader replaces the act of holding a scanner, not the host, the WMS (Warehouse Management System), the printed label, or a reader bolted to a conveyor.
An RFQ (request for quotation) for the class turns on mount, mode set, scan precision in mil, depth of field, store-and-forward, IP code and ESD (electrostatic discharge).

This article owns the definition and the taxonomy. The labor case for hands-free picking, the trigger modes and their failure modes, the optics penalty of a finger-worn body and the pilot design belong to the parent article, Wearable barcode scanner: what hands-free picking actually changes, and are not restated here.

What is a ring scanner, part by part?

Five parts repeat in different shells. An image sensor captures the symbol: 640480 optical resolution on the R43, 640480 CMOS pixels on the R41-21, and 640480 (optional 1280 960) on the R42 and the AI1520, whose engine row names the EDOO M1 module. An illuminator lights the label — the R41-21 states LED with white light and carries a laser aimer with a red cross, an aiming aid rather than a second reader. A decoder turns the picture into characters: a Dual-CPU architecture for parallel image processing on the R42, a self-developed fifth-generation decoding stack on the R41-21. A radio moves the result off the finger. A confirmation channel tells the wearer the read happened — Sound, LED, and vibration on the R42, Beeper, LED on the R41-21, and a built-in display on the AI1520, titled a ring scanner "With Screen".

Symbology support sits in that firmware: the R42 enumerates PDF417, QR Code, Aztec, Maxicode, Data Matrix and 1D families including Code 128 and EAN-13, names set by GS1 and the ISO/IEC symbol specifications. The printed list, not the word "2D", decides whether your label is in scope.

What is the difference between a ring scanner, a glove scanner and a wearable scanner?

Wearable barcode scanner is the superclass: any reader worn on the body during work. A ring scanner — also written barcode ring or ring barcode scanner — puts optics, decoder, cell and radio on one digit. A glove scanner or glove hand scanner spreads the same parts across the hand: EDOO titles the AI1510 a "Glove Wearable Wireless 1D 2D Barcode Scanner" and the AI1580 a "Portable Wireless WIFI BT Glove-style Barcode Scanner". A wrist-worn unit rides a strap at the wrist and is read by a flick or by a window facing up from the case. A handheld-as-hub build keeps a handheld or PDA on the belt as the computer and lets a ring feed it.

Two words travel with it. Presentation mode means the device reads continuously or on approach, so the worker presents the label to it instead of pointing it. Trigger-free means no button press starts a read; what each trade-off costs in false reads is the parent article's question. Hands-free barcode scanner is wider again: it also covers readers mounted rather than worn.

Where does the device mount, and what does each mount decide?

Mount class	What EDOO's pages carry in it	Where the read window ends up	What this means for your RFQ
Finger ring	R43 35 g, R42 40 g, R41-21 38 g net, AI1520 18 g, R40-N1 as a rugged ring 2D unit	On the fingertip, so the scan axis follows the pointing finger	Specify it for near labels at the hand — bin faces, tote and item labels; ask for the digit, sizing route and confirmation channel
Glove or back-of-hand	AI1510 (detachable 180 mAh cell, neck-worn or hand-worn), AI1580 (99 g, Android 14.0, 2300 mAh, 14 hours continuous use)	Off the gripping surface, across the back of the hand, sometimes with its own screen	Choose it when gloves are permanent or the digit cannot carry the mass; ask whether the unit is a peripheral or a computer
Wrist-worn	No EDOO wearable page published in October 2026 states a wrist body	On the wrist, read by a flick or a top-facing window	Source it outside this family; if a supplier claims it, ask which page prints the weight and the mount
Handheld or PDA as hub	The PDA and handheld computer range is the host; the AI1580 shows the same role inside a wearable	The host owns pairing, buffering and application state; the ring is its peripheral	Buy the session owner first and the reader second, then ask which mode set joins them
Mounted, not worn	Desktop presentation units, in-counter and self-service modules, fixed-mount readers	Stationary, aimed at where the label arrives	Move the label to the reader instead; a station decision, not a wearable one

These rows are mounts, not tiers: what changes in the field is where the window points and what the hands do at the moment of the read.

What does a ring scanner replace, and what does it leave in place?

It replaces one object — the scanner an operator holds, aims, squeezes and sets down. The rest stays, and a quotation goes wrong when a ring is priced as though it were the system.

The host stays. The R43, R42 and R41-21 are peripherals that pair with a phone, tablet or PC. The AI1580 removes that dependency: its feature block reads OS: Android 14.0 … 64GB ROM + 4GB RAM. The AI1510 reaches a gateway rather than a device on the person.
The application stays. A read becomes a pick only inside your WMS, and whatever accepts characters today is what the ring feeds.
The label stays. A wearable cannot read a symbol that is absent, or printed below the scan precision a page states; labelling faults come back as no-reads.
The station reader stays. Conveyor sortation and checkout apertures are mounted-read jobs.
Reach stays where it was. The parent article works through why a finger-worn body gives up distance, so covering every label position with one mount is a decision to make knowingly.

What does a ring scanner connect to, and which mode set?

Four transports appear across these pages; they are not interchangeable in software.

HID (Human Interface Device). The reader becomes a keyboard and characters land in whichever field has focus: quick to stand up, dependent on screen state.
SPP (Serial Port Profile). Classic Bluetooth emulating a serial cable, so host application or middleware owns the stream.
BLE GATT (Generic Attribute Table). Bluetooth Low Energy carries data through attribute characteristics, which here usually means the vendor's SDK (Software Development Kit); EDOO prints SDK Provided : Yes on the R43 and the AI1520.
2.4G receiver. A dongle paired to the device rather than to the host's Bluetooth stack, so the host sees a USB receiver.

The R41-21 states all three Bluetooth modes on one row — Bluetooth HID mode, SPP mode, BLE mode — transmission distance up to 50m (wide and empty area) — plus a 2.4G receiver … transmission distance up to 100m (wide and empty area). The R43 prints 3.0+4.2 Bt transmission over a Class 1 radio and the R42 Bluetooth 3.0+4.2, 2.4G Wireless, USB at 50 m open area; the AI1520 names Android, Windows, Linux and iOS; the AI1580 carries Wi-Fi and Bluetooth 5.0 as its own host; and the AI1510 states The gateway can support 300 sets of devices simultaneously and has a communication distance of 100 meters.

Store-and-forward — a device holding reads in memory while the link is down and replaying them later — is quantified on one page: the R41-21 states Max storage 130000 pieces of 13 bits commodity code. Bond survival across an OS update falls to whoever runs MDM (Mobile Device Management, the enterprise configuration layer) on the host.

Which words does a ring-scanner RFQ actually use?

Scan precision is stated in mils, the width of the narrowest bar element; a lower number means finer symbols at a stated code density. EDOO prints Scan precision ≥3mil for the R42, Precision: >= 3mil for the AI1580 and ≥5mil for the R41-21.
Depth of field is the working-distance window in which a symbol of that density decodes, so density travels with the number: the R41-21 lists Code 39 at 5mil 6-8cm, the R42 at 40–150 mm on 5 mil Code 39.
Field of view is the angular window the sensor sees — Horizontal 28°, vertical 21.5° on the R41-21 — and it explains aiming tolerance rather than reach.
PCS (Print Contrast Signal) is the bars-versus-spaces reflectance difference scored from 0 to 100 by the decode-tolerance families ISO/IEC 15416 for 1D and ISO/IEC 15415 for 2D; the R42 states PCS ≥25%. Pitch, roll and skew — the head-tilt budget at read time — are ±60°, 360° and ±60° on the same page.
IP code is the IEC 60529 dust-and-water rating: the R42 prints IP54, limited dust ingress and splash, not jets or immersion. ESD is discharge tolerance, ±8 kV contact and ±15 kV air.
Duty cycle is how often and how long a device may be worked before it rests; on a ring that is a battery and thermal question.

Order terms ride with the pages: Minimum Order Quantity | 1 pcs and Warranty | 1-Year appear on the R43 and AI1520, and EDOO's OEM terms are MOQ from 100 units, 15-day samples and 30-day mass production from its Shenzhen factory.

Where does the class get used outside a distribution center?

The wearable range lists ring and glove units together; each page names its own work. The R40-N1 is titled a rugged ring 2D barcode scanner and lists Mobile payments, e-coupons/e-vouchers, retail store management, inventory management, fixed asset management; it publishes no parameter table, so no figure here is attributed to it. The AI1520 states iPad compatibility. The AI1580 names receiving, dispatching, inventory counting, adjustment, picking, checking, and production line management as hands-free store and warehouse work, and the AI1510 lists Express logistics, warehousing equipment, etc. The same body gets quoted for a stockroom and a checkout, so ask which page prints which claim.

Model descriptors and parameter rows above are as published on edoo-iot.com, October 2026; confirm every figure against the datasheet at order time.

FAQ

Is a barcode ring the same as a ring scanner? Yes: both phrases name a finger-worn barcode reader, and neither says anything about decoding power. EDOO's finger-ring pages are the R43, R42, R41-21, AI1520 and R40-N1; four publish a weight, running from 18 g to 40 g, so the synonym is settled by mount and digit rather than by model name.

What are the four types of wearable barcode scanner? Four mounts: finger ring, glove or back-of-hand, wrist-worn, and a handheld or PDA acting as the hub with a ring as its peripheral. EDOO's wearable pages cover the first two directly, the AI1580 fills the hub role inside a glove body by running its own Android 14.0, and the wrist mount is vocabulary to source elsewhere.

Does a wearable scanner with a display matter? It changes the confirmation channel, where a worn reader loses reads. EDOO titles the AI1520 a ring scanner with screen and describes a built-in display; the AI1510 states The barcode content is clear on the screen during the scanning process beside sound, vibration and indicator lights; the R42 has sound, LED and vibration, no screen.

Does a ring scanner work with Android phones and tablets? Yes for the peripheral class: the R43 and R41-21 each state pairing with any Android, iOS or Windows device over a Class 1 Bluetooth radio, and the AI1520 lists Android, Windows, Linux and iOS compatibility. The AI1580 needs no phone because Android 14.0 is already in it, which is a different build and a different MDM conversation.