Pressure Measurement PI – I URVISH URVISH PI-I.

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Presentation transcript:

Pressure Measurement PI – I URVISH URVISH PI-I

Importance URVISH PI-I

Pressure Safety Achieve desired output URVISH PI-I

Pressure Pressure Pressure = Force/Area Units of force per unit area URVISH PI-I

Hydrostatic Pressure Hydrostatic pressure is the pressure in a liquid. The pressure increases as the depth in a liquid increases, due to its weight. In term of equation, P = ρgh ρ = density in kg/m3 g = acceleration due to gravity (9.8m/s2) h = depth in liquid in m P = pressure in Pa

Manometers U tube Well Type Inclined Float Ring Balance Barometer URVISH PI-I

Manometers Barometer URVISH PI-I

Float type Mano Meter URVISH PI-I

Float type Mano Meter URVISH PI-I

Ring Balance Type Manometer URVISH PI-I

Types of Bourdon Tube C Type Spiral Helical URVISH PI-I

Bourdon tube URVISH PI-I

Spiral Bourdon element URVISH PI-I

Bellows URVISH PI-I

Beam balance bellows sensor URVISH PI-I

Diaphragm Type URVISH PI-I

URVISH PI-I

Actual Image of Diaphram URVISH PI-I

Electrical Pressure Sensors LVDT type Strain gauge Piezo electric type Capacitance type. URVISH PI-I

LVDT type URVISH PI-I

LVDT type URVISH PI-I

LVDT with Bellows URVISH PI-I

Strain gage Resistance URVISH PI-I

URVISH PI-I

Strain gage Strain gage is attached to a flexible membrane. When the membrane is deflected the resistance in the strain gage changes. URVISH PI-I

Strain gauge with diaphragm URVISH PI-I

URVISH PI-I

Piezo electric Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress. URVISH PI-I

Piezo electric type Sensor Principles: ∆ Pressure  ∆ Charge  ∆ Voltage Applications: measurements with high accuracy, good repeatability, high resolution. URVISH PI-I

Piezo electric Material Quartz Cane sugar Rochelle salt Topaz Tourmaline Bone URVISH PI-I

Capacitance type URVISH PI-I

Working URVISH PI-I

Wein Bridge URVISH PI-I

Actual Transmitter (DPT) Differential Pressure Transmitter URVISH PI-I

Vacuum Sensors Thermal Conductivity gauge Pirani Gauge Ionization Gauge McLeod’s gauge URVISH PI-I

URVISH PI-I

URVISH PI-I

URVISH PI-I

Pirani Gauge URVISH PI-I

Pirani Gauge URVISH PI-I

McLeod’s gauge MOST IMP URVISH PI-I

URVISH PI-I

McLeod Gauge

Formula P= KHH0(1-KH) P= measured Pressure K = Constant H= Height difference in open column H0= Height above zero line closed column URVISH PI-I

Ionization Gauge Electrodes URVISH PI-I

Ionization Gauge It can be used to measure pressure down to about 2 torr. The gas is ionized with a beam of electrons and the current is measured between two electrodes in the gas. The current is proportional to the number of ions per unit volume, which also proportional to the gas pressure.

Optical Pressure Sensor URVISH PI-I

Pressure Switch NO / NC on SET Pressure URVISH PI-I

Pressure Switch URVISH PI-I

URVISH PI-I

To calibrate Pressure Gauges Dead weight tester Application : To calibrate Pressure Gauges URVISH PI-I

Dead weight tester URVISH PI-I

URVISH PI-I