Automation System
A smart solid-state sensor is:

All of these
one that integrates both logic and a solid-state sensor into one unit.
None of these
one that has two or three substrates
not available today

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Automation System
An aneroid barometer

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

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