What is EAS (Electronic Article Surveillance)?
EAS is the technology behind the security gates at retail store entrances. Here is a clear explanation of how it works, what the components are, and why retailers use it.
EAS in one sentence
Electronic Article Surveillance (EAS) is a security technology that attaches a detectable tag or label to merchandise, which triggers an alarm at the store exit if not deactivated or removed at the till.
The three components of an EAS system
- Tags and labels attached to merchandise - these respond to a specific electromagnetic signal.
- Detection gates at store exits - these emit the signal and trigger an alarm when they detect an active tag.
- Deactivators or detachers at the till - these neutralise labels or physically remove hard tags when a customer pays.
How EAS works
When a customer buys a tagged item, the till operator either deactivates the label (using a pad at the till) or removes the hard tag using a magnetic detacher. This stops the tag responding to the gate signal.
If an item leaves the store without being processed at the till - either through theft or oversight - the gate detects the active tag and triggers an audible and visual alarm. Staff can then investigate.
The three main EAS technologies
- AM (Acousto-Magnetic) operates at 58 kHz. Used by pharmacy, grocery and high-value retail. Higher detection rate near metals and foils.
- RF (Radio Frequency) operates at 8.2 MHz. Used by fashion, department stores and general retail. Cost-effective, widely deployed.
- EM (Electromagnetic) older technology, still used in libraries, less common in modern retail.
AM and RF tags are not interchangeable. An AM label will not trigger an RF gate, and vice versa.
Why retailers use EAS
EAS is the most cost-effective loss prevention technology available. A basic single-entrance installation pays for itself within 6 - 12 months for most retailers through reduced shrinkage. A CrossPoint or Checkpoint gate pair combined with 2p per-label consumables protects inventory that would otherwise walk out the door.
Beyond pure theft reduction, EAS also enables:
- Open merchandising - customers can handle products freely, which drives sales.
- Staff confidence - front-line workers have back-up when challenging suspicious behaviour.
- Shrinkage data - modern systems log alarm events for analysis.
EAS vs RFID - not the same thing
People often confuse EAS with RFID. They are related but different.
- EAS detects any active tag - yes/no. Good for loss prevention alarms.
- RFID reads a unique ID from each tag - good for inventory counts, stock location, individual item tracking.
Many retailers deploy both: EAS at exits for alarms, RFID in stockrooms and fitting rooms for inventory.
Thinking about EAS for your store?
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