1. Pressure measurement Prof.R.G.Telrandhe

2. Need of pressure measurement? Pressure? Differential quantity Different pressures and relationship between them Static and total pressure Units

3. Instruments for measurement [1] Gravitation type: manometers [2] Mechanical displacement type - Ring balance manometer - Bell-type manometer [3] Elastic pressure transducer - Bourdon tube pressure gauge - Diaphragm type gauge - Bellows gauges

4. [4] Electrical pressure transducers - Resistance type pressure transducer - potentiometer devices - inductive type transducer - Capacitive type transducer - Piezoelectric pressure transducer [5] Bridgman gage [6] Low pressure measurement gages - McLeod gage - Thermal conductivity gage - Ionization gage [7] Varying pressure measurement - Engine indicator - CRO

5. Instrument selection [1] Below 1 mm of Hg - Manometers and low pressure gauges [2] Between 1mm of Hg to 1000 atm - Bourdon tube - Diaphragm gauges - Bellow pressure gage - Dead-weight pressure gage [3] vacuum (760 torr to 10 -9 torr) - McLeod gage - Thermal conductivity and ionization gage

6. [4] High pressure (1000 atm and above) - Bridgman gage - Electrical resistance type - Bourdon tube [5] Variable pressure measurement

7. Manometers Device used to measuring a pressure at a point in a fluid by balancing the column of fluid by the same or another column of liquid. Used as standards because free form friction or hysteresis effects.

8. Manometers classification [1] simple - Piezometer - U-tube manometer - Single column manometer - Vertical single column - Inclined single column [2] Differential - U-tube differential - Inverted U- tube differential