Answer to Question #331149 in Molecular Physics | Thermodynamics for SCHARLIE

Question

The central deflection of the diaphragm of an elastic type pressure measuring instrument was

found to be 0.25mm of an applied pressure of 106𝑝𝑎. The output displacement of diaphragm

has been fed to a Linear variable differential transducer (LVDT) with a built in amplifier

having a sensitivity of 40V/mm. Finally the output is displayed on an analog voltmeter which

has a radius of scale line as 60mm and has a voltage range from zero to 10 volts in an arc of

1500. Using a well labelled diagram, determine the sensitivity of the given diaphragm gauge

in terms of mm/bar (1 bar=105𝑝𝑎).

Answer 1

$\tau=n\frac{U}{u'}\frac d{bp}=1.3~\frac{mm}{bar}.$