Here's a good video on this type of problem...
This past week I went thru full body scanners at both JFK & Vegas airports without any problems. I wore POD on back of my upper arm so I could show it as soon as detector noticed it, which it did both times. I was asked what was on my arm & I just showed the pod & said "insulin pump". Both TSA people said, no problem & I was on my merry way.
I had the same exact experience. Was not a problem. On the return flight there was not full body scanners, and I didn't even mention it so it wasn't checked. Smooth sailing.
I've flown several times in the last couple of months with my OmniPod and Dexcom with no problems. I'm a worrier by nature and was worried about placement of the pod and Dex sensor to show TSA. I even printed out literature from the OmniPod and Dexcom web sites to carry with me in case I had to explain to someone unfamiliar with these devices - but I didn't need them.
I flew through Reagan National, Las Vegas, and New Orleans airports with no problem. Full body scanners except for one leg through New Orleans where I actually set off the metal detector. I immediately showed the pod and said "insulin pump" and the TSA agent said it should not have caused the metal detector to go off but he said sometimes they just randomly go off.
In all cases, they made me touch my hands to my pod then swabbed my hands with what looks like a cotton gauze type pad and put it in a machine. Literally a few seconds later they told me I was good to go. Fast and easy. The funny thing is that either they didn't notice the Dex sensor on my arm or they just ignored it.