I am fairly new to RFID tags and thus keep this very simple:
I would be interested in using RFID tags in a closed circulating system for volume control, where I would dropp about 20-100 RFID, which would then have to pass various restrictions of up to 13/32". Temperatures are fairly benign at max. 30ºC and the fluid can either be based on water or diesel. When the tags return I would like to measure them and from the time it took them to complete the circle - assess the system volume. My major concern at the moment is that this would ahppen in an industrial environment, thus plenty of steel around.
Any advice would be appreciated
our RF-HDT-DVBx parts are made to live in such environments such as drycleaning fluid (which is not so different from fuel) but smallest one we manufacture is 22mm in diameter, which is over twice as big as your 13/32" (.406 in or 10.3mm) size requirement.
There is a company called Syrma who is making such small sized tags with our tag silicon however and overmolding them with similar material which might withstand your environment.
You can contact Paul Dahl at
firstname.lastname@example.org or 952-955-7525 to discuss.
I would like to warn you for the Steel in your environment. This will totally block your antenna signal. If the tags are going through a tube it will have to be of some kind of plastic!
The more tags you will add the less chance you have of detecting them. When two tags are close to eachother the reader will not be able to differentiate both. If you add about 200 tags I imagine a big problem. I would advice to use only one tag and try to get 100% coverage.
The maximum speed a tag can travel is about 3m/s (based on 50ms interval readings and it's maxim reading distance) for the 134.2kHz tags I used. so if your fluid goes more rapidly you might miss the tags cycle time!
Hope these few hints help...
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