How do Bourdon Tube Pressure Gauges Work?

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The principle of a Bourdon Tube Pressure Gauge is the C-shape or Coil shaped (Bourdon Tube). This is a radially formed hollow tube which, when media is forced within it, straightens up and moves a pointer which displays the pressure being generated. The C-shaped tube is generally bent at an angle of 270° and has a closed-end and an open-end that connects directly with the process media. For higher pressures, a coil-shaped tube is generally used.

The pointer movement is generated mechanically by the pressure within the Bourdon Tube and does not require any electricity to power it. The only other mechanical parts are the linkage at the end of the tube which can be adjusted when calibrating, a quadrant toothed segment that attaches to the movement, a gear, and a hairspring which is attached to the pointer.

0:00 Intro
0:16 Key external parts to a bourdon tube pressure gauge
1:00 Key internal parts to a bourdon tube pressure gauge
1:31 Working parts
2:10 Bourdon tube types
2:28 Advantages
2:56 Disadvantages
3:18 Benefits of Budenberg Pressure Gauges