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1. Movement (shock). You can use a piezo buzzer as a sensor. You can even use a mecahnical relay to sense some amount of shock. Or you could use an accelerometer if you want to spend money.
2. Movement (displacement). LVDT, linear encoders, reisitance sliders.
The problem of such sensor are that they are mostly fabricated for OEM's.
So there is nearly no chance to get a single one.
One possibility is to get a door-opener and to reuse it's doppler-module
(most a gunn-source with demodulator). Most of them are working on
the K-Band (24GHz), but there also exist (bigger ones) at X-Band (10GHz)
Perhaps you will find on the internet something if you search with terms
like 'gunn source', 'doppler module' or 'movement sensor'
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