In the process of manufacture of copper sheets, the thickness of the sheet is to be continuously monitored. Which transducer will be most suitable for this purpose?

In the process of manufacture of copper sheets, the thickness of the s

1.	In the process of manufacture of copper sheets, the thickness of the sheet is to be continuously monitored. Which transducer will be most suitable for this purpose?
A.	LVDT
B.	Strain gauge
C.	Photocell
D.	Any of the above
E.	None of the above
Answer» B.