2. BOURDON TUBE
Bourdon tube is a curved or twisted metallic tube
having elliptical cross section and sealed at one
end.
The type of hard metal tube can be bronze or
brass.
The tube is then bending into a curve ,arc or
spiral. The open end is attached to a header by
which a pressure can be introduced to the inside
of the tube.
3. The tube will deflect when the inside
applied pressure is different from the
outside pressure.
The tube will tend to straighten out if the
inside pressure is higher than the outside
and to curve more if the pressure inside
is less than the outside.
