a) Bourdon tube pressure gauges
b) Barometric sensor
c) Piezoelectric pressure sensor
d) Piezoresistive pressure sensor
Answer: a
Explanation: Bourdon tube pressure gauges are widely used to measure medium to high pressure. The range of pressure it can detect is from 600mbar to 4000 bar. The measuring unit consists of curved tube with circular, spiral or coiled shape called as bourdon tube.
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