What are the primary elements for measuring pressure?

The primary elements used for measuring pressure are:

  • Bourdon tube.
  • Diaphragm.
  • Capsule.
  • Bellows.
  • Pressure Springs.

The above are known as elastic deformation pressure elements.

Type of Bourdon tubes.

  • ’C’type.
  • Spiral.
  • Helix.

Diaphragm: The diaphragm is best suited for low pressure measurement.

Capsules : Two circular diaphragms are welded together to form a pressure capsule. Material Used: phosphor bronze, Ni-spanc stainless steel.

Bellows : Bellows is a one - piece, collapsible, seamless metallic unit with deep folds Formed from very tin walled tubing. Material used: Brass, phosphor bronze, stainless steel. Used for high Pressure.

Pre.spring: Pressure springs of helical or spiral shape used for measuring high pressures.