Bourdon Tube Pressure Gauges
The most common type of pressure gauge is the C shaped Bourdon tube and the key parts include a
bezel ring that hols the window on to the case. A window that is typically three millimetre safety
glass and inner ring that keep the window away from the pointe. The pointer that rotates with
pressure is used for stopping to hold the pointer at the set unit. The dial is used to display the units
of pressure and is typically white anodized aluminium.
The gauge case and the rear cover protect the inner parts of the pressure gauge. The key parts
within a board and a tube pressure gauge the movement which includes the hairspring gears and
linkages, a C-shaped board and tube which is typically bent at an angle of 270 degrees and has a
closed end. A linkage which can be adjusted when calibrating, a quadrant toothed segment which
attaches to the movement, the connection which can be neither direct flush or surface mounted.
As the media enters the bottom it moves up through the connection and the socket and enters the
boarding tube with an increased pressure. Then the tube expands and tries to straighten out
resulting in the movement of the linkage quadrant and gears as the quadrant moves it turns the
gear.