A bourdon tube in a pressure gauge is normally of what design?

A bourdon tube in a pressure gauge is normally of what design?

• A. C-Shape
• B. U-Shape
• C. S-Shape
• D. Spiral

Answer: (A)

A bourdon tube works by being a curved, elastic tube whose internal pressure makes it want to straighten. That slight straightening translates into a measurable displacement at the tube’s end, which is then linked to a pointer to indicate pressure. The most common form for this tube is a C-shaped bend. This shape provides a reliable, predictable change in curvature with pressure, giving good sensitivity in a compact form while keeping the linkage simple and easy to manufacture. Other forms like U-shaped or spiral exist for special cases, but the C-shaped design is the standard choice for typical pressure gauges.

A bourdon tube works by being a curved, elastic tube whose internal pressure makes it want to straighten. That slight straightening translates into a measurable displacement at the tube’s end, which is then linked to a pointer to indicate pressure. The most common form for this tube is a C-shaped bend. This shape provides a reliable, predictable change in curvature with pressure, giving good sensitivity in a compact form while keeping the linkage simple and easy to manufacture. Other forms like U-shaped or spiral exist for special cases, but the C-shaped design is the standard choice for typical pressure gauges.