Cracked open an expired sensor, and discovered a 'hearing aid' button battery and mother board populated with small chips.
This not for disposal in the household rubbish. Thinking I'll have to extract the battery and put the rest in the 'electronics' bin at the dechettarie. I'm surprised that Abbott doesn't include instructions on disposal. Perhaps I'll just send the expired sensors and applicators to their CEO's home address.
Still, not enough metal to set off scanners, yet.