Hi! I’m considering an implant but was more interested in 125 khz RFID than the NFC, though I’d be interested in the NFC capabilities if there weren’t many drawbacks.
My question is if the read distance for the T5577 tag is the same for the xEM tag as it is for th NExT tag. If it’s the same (ie - having the NExT tag and using it for my ID badge would function just as well as an xEM tag) I’d likely got the NExT; if not I’d get the xEM.
Same readers, as similar presentation as possible given they are in different locations of my hand
For instance with the XACv2 for my gunsafe project, I initially used my xem in L5 easy 1-2” air gap
Now I use my NEXT in center top wrist, 1/8” air gap max, typically touching
Same NEXT wouldn’t work with work reader, same xEM just barely hits it
I haven’t used the LF on my 2nd for anything yet, but since it’s in em more by default, I can make it chip my XAC, same distance as my first NEXT, about 1/8”, and this implant is my most shallow
(I quietly worry it may reject some day)
Lol. There’s no biohacker solidarity on performance, man. Data speaks for itself.
I have a NExT installed and some loose around here. Unfortunately I only have 1 xEM that’s in an injector, and I’d like to keep it that way. Common sense indicates that the xEM would have better range because more of the implant is devoted to the antenna. In this case their performance is balanced out because the tighter antenna in the NExT and the higher quality ferrite necessary to create that smaller antenna cause the chip to recieve more flux from the same field. Basically they should have the same read range, but it’s possible the xEM could be easier to position correctly.
@Equipter might be able to give us some insights. They have both an xEM and (a bunch) of NExT, plus they’re good with a Proxmark. Might be able to do an lf tune or something and give us some numbers with n sheets of paper between the implant and the antenna.
Yeah so it looks like the xEM is in fact getting slightly better coupling with both flat and cylindrical antennas, adjacent to and a small distance away. The difference is exceedingly small though, so functionally from a user perspective they’re probably about the same.