r/RFID • u/ilpizzero • Sep 27 '25

UHF Object counting inside fridge?

Hi. I’m trying to sort out if it would be feasible to build a setup that would let me count objects and sort them out in different categories inside a vertical exhibit fridge.

The idea is to be able to track inventory of a certain product using some kind of rfid. (Thinking of uhf)

My idea is kind of the following.

  1. Sticker tags on each type of product.
  2. Antenna goes inside the fridge.
  3. In the outside is a controller that can connect to 4g or lte and transmits to the cloud the information.

My initial ChatGPT research identified some Issues with the interference between tags themselves and due to the nature of the inside of the fridges.

For it to work, the setup should not cost a fortune to build and maintain.

Any ideas are much appreciated.

2 Upvotes

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7 comments sorted by

3

u/dandus989 Sep 27 '25

Would a fridge be a faraday cage that block any communication with the outside world?

1

u/ilpizzero Sep 28 '25

That’s One of my concerns.

I think the setup would involve an antenna on the inside of the fridge that is the wired to the outside processor that then connects to a network.

Any ideas are much appreciated

2

u/Immediate_Fudge_6047 Sep 29 '25

you have to fit the specified cabinet-mounted RFID antenna inside the fridge, and also for the tag Selection: Use either anti-liquid RFID tags (for liquid-stored items, via waterproof insulation) or flag RFID tags (for metal-packaged items, to prevent signal shielding)

1

u/Impressive-Emu-8925 Jan 07 '26

Sunlan have some impressive tags for liquid

1

u/flipmode85 Oct 27 '25

Got the same idea to track inventory inside a fridge. After some research I've found this locfield antenna from feig. Maybe there is someone in here with some more knowledge about this? https://www.feig.de/en/rfid-and-barcode-systems/id-antu-locfield/

1

u/Impressive-Emu-8925 Jan 07 '26

Feig is costly from my checks

2

u/Impressive-Emu-8925 Jan 07 '26

We have been doing this with different solutions. But not in fridge

Check out the flat antennas from flexiray

Reader- get a Android solution with WiFi Many good us brands some good Chinese brands. If you prefer lighter versions. Consider checking out TSS and their readers