1. Bourdon Gauge: The Bourdon tube is a mechanical pressure transducer consisting of a flattened tube bent into a C-shape, spiral, or helix. When high pressure is applied internally, the tube tends to straighten. This movement is linked to a dial or an electronic sensor. Bourdon gauges are exceptionally robust and are the standard for measuring
high pressures, ranging from 10 psi to over 100,000 psi.
2. Comparison with Vacuum Gauges:
• McLeod Gauge: A mercury-based device used primarily as a calibration standard for
low pressures (vacuums).
• Pirani Gauge: Works on the principle of thermal conductivity to measure
low pressures in vacuum systems.
• Alphatron: An ionization-type gauge used for measuring
vacuum levels by ionizing gas molecules.