Which of the following is not a mechanical pressure sensing element ?
Correct answer: D. U-tube
- A. Bellows
- B. Diaphragm
- C. Bourdon tube
- D. U-tube
Explanation
Bellows, diaphragms and Bourdon tubes are elastic mechanical elements that deform under pressure. A U-tube measures pressure through the hydrostatic difference in liquid levels, so it is a manometric rather than a mechanical pressure-sensing element.
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