A fluid flow rate is calculated from the difference in pressure measured across a venturi. The flow rate is given by: F ¼ K (p2 e p1) where p1, p2 are the pressures either side of the venturi and K is...

A fluid flow rate is calculated from the difference in pressure measured across a

venturi. The flow rate is given by: F ¼ K (p2 e p1)

where p1, p2 are the pressures either side of the venturi and K is a constant.

The two pressure measurements are 15.2 and 14.7 bar.

(a) Calculate the possible error in flow measurement if the pressure measuring instruments have a quoted error of 0.2% of their reading.

(b) Briefly discuss why using a differential pressure sensor rather than two separate

pressure sensors would improve measurement accuracy.