RFID Retail Floor Inventory Range — Nordic ID HH83 + Confidex Ironside Slim for Demo Units
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Laboratory · Read Range Calculation
RFID retail floor inventory calculation. Nordic ID HH83, three scenarios: boxes on gondolas, glass display cases, demo units on metal enclosures. Confidex Ironside Slim vs RFID price tag.
Reader
Nordic ID HH83
ETSI EU · 35.2 dBm EIRP · V/H/V+H
Boxes
Metal gondolas
−5–8 dB loss
Display cases
Glass ε_r 6–8
−3–5 dB extra loss
Demo units
Metal enclosures
Ironside Slim / RFID price tag
01 · Store scenarios
Read Range for Three Display Scenarios
⚡ Standard tag on metal demo unit: R_max only ~0.4 m (near direct contact). Ironside Slim increases range to ~1.0 m and provides reliable per-device identification on display.
02 · Operator body
Operator Body — Dielectric Losses
Operator body — RF absorber (ε_r ~60)
✓ Correct position: scanner in front of body
- ✓Body behind antenna — out of the beam
- ✓Loss: 0–2 dB (minimal)
- ✓Hold HH83 extended toward merchandise
- ✓Standard posture when scanning shelves
✗ Wrong: body between antenna and tag
- ✗Body in beam — 6–8 dB absorption
- ✗Reduces R_max from 1.5 m to ~0.7 m
- ✗Nearby shoppers = additional loss
- ✗Avoid scanning across your own body
03 · Demo on metal
Demo Units: Ironside Slim vs RFID Tag
04 · Distances
Recommended Distances by Display Type
05 · Tag placement
Where to Place the Tag on the Box
✓ Tag on front face (façade)
- ✓Visible when scanning from the aisle
- ✓Not blocked by adjacent boxes
- ✓Convenient for inventory scanning
- ✓Standard merchandising position
✗ Avoid
- ✗Top face — not visible on shelf during scanning
- ✗Rear face — pressed against shelving
- ✗Side face — visible only from the row end
06 · Model limitations
What Friis Does Not Account For
07 · Recommendation
Engineering Summary
✓ Retail floor best practices
- ✓Ironside Slim for demo laptops and tablets >€300
- ✓RFID price tag for mass accessories and phones
- ✓Tag on box front face — bottom of façade
- ✓Hold HH83 extended (body behind)
- ✓Display case: approach to 0.3–0.6 m
- ✓V+H Switching for random orientation in store
✗ Avoid
- ✗Standard tag directly on metal demo enclosure
- ✗Tag on rear or top face of box
- ✗Pressing HH83 against body when scanning
- ✗Scanning glass display cases from >1 m
Final recommendationBoxes on shelf: M750 + tag on front face + 0.5–1.0 m = 96–99% read rate. Display case: approach to 0.3–0.6 m. Demo units: Ironside Slim for premium devices, RFID price tag for mass products.
08 · FAQ
Frequently Asked Questions
How to read demo laptops on display without tagging the body?
Two options: Confidex Ironside Slim — 38×13 mm on-metal tag, adhered to the lid hinge or base, removed at sale, range ~0.8–1.2 m. Or an RFID price tag on a holder next to the product. For laptops over €300 Ironside Slim is recommended — no visual damage, reliable per-device identification.
Why does a glass display case reduce range?
Glass has ε_r 6–8, causing 3–5 dB additional loss from RF refraction. Total: R_max drops from ~1.5 m (shelf) to ~0.8 m (display case). Scan through glass from 0.3–0.6 m.
Why should the scanner not be pressed against the body?
The human body has ε_r ~60 (like water) — a strong RF absorber. If the body is between the HH83 antenna and the tag, additional losses are 6–8 dB. Keep HH83 extended toward the merchandise — body must be behind the antenna.
rfid.org.ua · RFID Laboratory · StoreModel: Friis · ETSI EN 302 208 · 2026-02-27
