Originally Posted by
unterhausen
I looked up what the sensor on the varia looks like, and it's hard to believe it's a standard sensor. I wish I could find a picture that's good enough to determine which chip they are using.
It's possible that Garmin is using its own censor and the others are using an off-the-shelf component. There are 4 (at least) manufacturers. I doubt all of them are making their own sensor.
The antennas are different.
https://www.mtbr.com/attachments/p4080497-jpg.1251210/
https://device.report/m/d4c2a107e007...05bb321ba5.pdf