Which of the following is a type of pressure transducer that uses a metal bellows and a Wheat-stone bridge?
a. Resistive (or re-sistance) c. Variable inductance
b. Strain gauge d. Variable capaci-tance
ANS: A
A resistive (or resistance) transducer consists of a thin metal bellows attached to four wires, forming a Wheatstone bridge. The variable capacitance transducer has a flexible diaphragm to sense pressure changes, but it is linked to an electrode. A variable inductance transducer consists of a stainless steel diaphragm attached to a soft iron core positioned between two coils.
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