AM vs RF Security Tags: Which Should You Use?

The short answer

If you sell fashion, general merchandise, or lower-value goods in high volume, RF is usually the right choice. It is cheaper per label, widely compatible, and meets most retail security needs. If you sell high-value goods, items in foil or metallic packaging, pharmacy, or need the highest possible detection rates, AM is usually better. AM is more expensive, more reliable, and harder to defeat.

Most retailers do not need both. You pick one technology and commit to it across the store, because labels are technology-specific (an AM label does not trigger an RF gate, and vice versa).

How AM and RF work

AM (Acousto-Magnetic)

AM tags contain a small strip of amorphous metal that resonates at a very specific frequency (58 kHz) when hit by a magnetic pulse from an EAS gate. The gate listens for the echo and triggers an alarm if it detects it. AM is used by most major grocery chains, pharmacies, and fashion retailers in the UK.

RF (Radio Frequency)

RF tags contain a tuned circuit (capacitor and coil) that resonates at 8.2 MHz when activated by the radio field of an EAS gate. When the tag passes through, it disturbs the field and triggers the alarm. RF is the most common EAS technology globally and is the workhorse of mid-to-high-street retail.

Head-to-head comparison

When to choose AM

• You sell products near metal or foil. AM works where RF fails - think pharmacy with foil blister packs, electronics in metallic packaging, cosmetics in tinted tubes.
• Your store has wide entrances. AM gates can cover aisles up to 2.4m wide. RF maxes out around 1.5m.
• You need high detection reliability. AM typically achieves 95%+ detection. RF is usually 85 - 95%.
• You stock higher-value goods. The slightly higher per-label cost is insignificant against higher ticket prices.
• You are already running AM. Switching technologies means replacing every gate and every label stock. Rarely worth it.

When to choose RF

• You sell high-volume, lower-value goods. RF labels are cheaper, which matters when you tag hundreds of thousands of items a year.
• Your products are mostly fabric, paper, or plastic. RF performs best on non-metallic merchandise - fashion, homeware, books, toys.
• You run multiple stores and need a common standard. RF is the most widely deployed EAS technology, making sourcing labels easier.
• Budget is a hard constraint. RF installations are typically 20 - 30% cheaper than AM.
• You are already running RF. Same reasoning as AM - don't switch without a good reason.

Common mistakes retailers make

Choosing RF when they should choose AM

The most expensive mistake: installing RF in a pharmacy or grocery environment where metallic packaging causes false negatives. You end up with an alarm system that doesn't catch thieves - which is worse than no system because it creates a false sense of security.

Mixing technologies

Some retailers try to run AM and RF alongside each other. This almost never works well. Labels must be matched to gates. Staff confusion at the deactivator is common. Stick to one technology per store.

Under-specifying the system

Buying a single AM gate pair for an entrance that is 3m wide means poor coverage at the edges. Always size gates to the full entrance width, with overlap.

What TagShopUK recommends

We don't have a vested interest in pushing one technology over the other. We are a CrossPoint Premium Partner and supply both AM and RF systems. Our usual process is to carry out a free site survey, understand what you sell and how, and recommend the technology that fits - not the one with the higher margin.

If you're replacing an existing system, we can usually retain compatibility. If you're fitting out a new store, we'll specify from scratch.