Pressure measurement



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03 PRESSURE

PRESSURE MEASUREMENT

  • Dennis C. Porlaje

PRESSURE

  • Pressure is the amount of force applied on a body per unit area.

ATMOSPHERIC PRESSURE

  • Atmospheric pressure is the amount of pressure that the air in the atmosphere exert on a body due to the influence of gravity.

HYDROSTATIC PRESSURE

  • Hydrostatic pressure is the amount of pressure that a column of liquid exerts on a body due to the influence of gravity.

Modes of Pressure

PRESSURE ELEMENTS

  • Manometer
  • Force-summing devices (elastic elements)
  • Piezo-electric

U-Tube Manometer

Well-Type Manometer

Inclined Manometer

Force-Summing Devices (Elastic Elements)

  • Bourdon Tubes
  • Diaphragm
  • Bellows

Bourdon Tube

Diaphragm

Diaphragm

Bellows

Piezo-Electric Devices

  • Piezo-Resistive Elements (Strain Gauge)
  • Piezo-Voltaic Elements

Piezo-Resistive (Strain Gauge)

Strain Gauges & Load Cells

Piezo-Voltaic

Differential Pressure Transmitter

  • Pressure (Absolute, Gauge, Vacuum, Differential)
  • Level
  • Flow
  • Temperature
  • Viscoscity

LEVEL MEASUREMENT USING DP XMTR

Open-Tank Level

Closed-Tank Level (Dry Outside Leg)

Closed-Tank Level (Wet Outside Leg)

ELECTRONIC DP XMTR

Capacitive Cell

Single Unit

Multi-loop


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