The first set of pressure sensors I got were exactly as specified, 1.6mm x 1.6mm... it's just that I didn't realize how small the contacts on the chip would really be and I am a noob with soldering. (us comp sci guys rarely touch actual hardware). It would be cool if there's an easier way to use these, but if not they were only about $1.56 each so no big deal. I do have a toaster oven.
http://www.mouser.com/ds/2/400/AEAC3...580-525808.pdf

Anyway, I got a different Honeywell sensor with a hole mount and leads that are big enough for alligator clips, so it will be much easier to use. (and I won't have to convert readings in bar into psi with the new one I got).

I think I'll install the sensor into a pipe cap so I can use a pipe T and nipples to adjust to different tubing in the future. I can get a second T and hook up an analog pressure gauge also. I have a spare gauge from when I built my pressure pot for resin casting.