here's a fun little part: it's a force sensor! 
it uses a wheatstone bridge topology. you apply a voltage and measure the imbalance between the two resistor dividers.
looks like it is $90 each on Mouser! wow. mouser.com/ProductDetail/…
so what to do with it? let's take it apart 😈
the lid came off with a little prying using a very sharp knife. may i present: a very tiny ball bearing!
underneath the ball bearing is the sensor element. i've flipped it over so you can see the zebra strip material that connects it to the leads.
after removing the zebra strip which is basically glued on, you can see that this is a silicon chip! it has 4 main pads and what appears to be a calibration pad. 🤯
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