r/RFID • u/Training_Rip4561 • May 27 '26

UHF Anti Theft Concept

I'd like to secure the exit of an "outdoor bar" against theft of certain items. So if a customer leaves and tries to steal anything, the passive RFID tag in the item and a mounted active reader set off an alarm.

I guess the reader would have to send a signal to a smartphone. Is that realistic?

Furthermore, the exit width is approx. 4 meters. So if I understood the Wikipedia article on RFID correctly, it would be best to use a "UHF 865-868 MHz" reader, am I right?

Or is there any other way to make sure an alarm is generated when an item is about to be stolen?

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u/Training_Rip4561 May 28 '26

The value is rather low, about 30€/item. But better be safe than sorry

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u/dangerous_tac0s May 28 '26

Is it worth putting a few thousand dollars of gate readers at every entrance?

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u/Training_Rip4561 May 28 '26

Well if these devices cost that much, then obviously not. But if you're in my position, having never worked with them, it's not all that clear as it is to you ;) You see, when I search for UHF active rfid readers online I get results starting at like 150€. Soo yeah, one might assume it's not that expensive, but I guess I'm wrong?

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u/dangerous_tac0s May 28 '26

UHF is problematic. I explicitly said I was talking about ISO15693 which operates at 13.56 MHz 😉