Automation System
An aneroid barometer

is very unreliable
can measure only atmospheric pressure
measures pressure by sensing deflection of an evacuated chambers.
can be used to measure gas or liquid flow rates
None of these

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Automation System
Pressure sensors:

All of these
use the piezoresistive effect in strain gauge sensors
use capacitive variations to sense pressure
None of these
use an aneroid chamber with a variable resistance output

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