There are also thermal accelerometers, which have a little bubble of fluid (air, probably?) with a heater surrounded by temperature sensors; the warmer (and therefore less dense) part of the fluid moves in the direction of acceleration. I don't know if these are any more accurate than the types you mention; I'm just mentioning them for completeness. :) I think their main advantage is shock/impact resistance.
50000g (fluid based) vs. 5000g (capacitive based). I think production cost is more of an issue.
I presume we're talking about an explosive-based mechanism to get to the 50000 g values.
Yes, you would likely rip everything out of the PCB with 50K G anyway. Ususally, you don't care much about the device after impact, as in ICBMs.
Artillery shells experience 10,000 to 15,000 Gs at firing, and they have put some pretty complex electronics in them.
Mark Borgerson
s;
e. :)
drop a accelerometer 3 feet on a hard surface will get you 10,000+ g's and kill most mems accelerometers
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