PressurePrecision Property
Represents the range within which the measurement is correct,
controlling how the ToString() method behaves.
Precision represents a power of 10, indicating
the coarsest grain of precision that will be displayed. For example,
a precision of 3 indicates values are displayed to the nearest 1,000; while
a precision of -3 indicates values are displayed to the nearest 0.001.
A precision of MinValue indicates that
the ToString() method should ignore the Precision
property altogether.