ANS:B - manometer

The correct answer is: Manometer A manometer is a conventional mechanical transducer used to measure pressure. It typically consists of a U-shaped tube filled with a liquid (such as mercury or water) and connected to the system where pressure is being measured. The pressure difference between the two arms of the U-tube causes a displacement of the liquid column, which is proportional to the pressure being measured. By measuring this displacement, the pressure can be determined. Therefore, a manometer converts pressure signals into displacement signals.