A Piezometer is used for measuring pressure inside a vessel or pipe in which liquid is there.a tube may be attached to the walls of the container (or pipe) in which the liquid resides so that liquid can rise in the tube. By determining the height to which liquid rises and using the relation P1= pgh, gauge pressure of the liquid can be determined. It is important that the opening the of the devices is to be tangential to any fluid motion, otherwise an erroneous reading will result.
2.0 BAROMETER
A Barometer is a device used for measuring atmospheric pressure. A simple barometer consists of a tube of more than 30 inch (760 mm) long inserted into an open container of mercury with a closed and evacuated end at the top and open tube end at the bottom and with mercury extending from the vacuum. It contains mercury vapour at its saturated vapour pressure, but this is pressure is calculated from the relation Patm = pgh where p is the density of fluid in the barometer. There are two types of barometer:
1) mercury barometer
2) aneroid barometer
3.0 BOURDON GAUGE
Bourdon gauge is used to measure pressure differences that are more than 1.2 bar. The pressure to be measured is applied to a curved tube, oval in cross section. Pressure applied to the tube tends to cause the tube to straighten out, and the deflection of the end of the tube is communicated through a system of levers to a recording needle. This gauge is widely used for steam and compressed gases. The pressure indicated is the difference between that communicated by the system to the external pressure, and is usually referred to as the gauge pressure.
A Barometer is a device used for measuring atmospheric pressure. A simple barometer consists of a tube of more than 30 inch (760 mm) long inserted into an open container of mercury with a closed and evacuated end at the top and open tube end at the bottom and with mercury extending from the vacuum. It contains mercury vapour at its saturated vapour pressure, but this is pressure is calculated from the relation Patm = pgh where p is the density of fluid in the barometer. There are two types of barometer:
1) mercury barometer
2) aneroid barometer
3.0 BOURDON GAUGE
Bourdon gauge is used to measure pressure differences that are more than 1.2 bar. The pressure to be measured is applied to a curved tube, oval in cross section. Pressure applied to the tube tends to cause the tube to straighten out, and the deflection of the end of the tube is communicated through a system of levers to a recording needle. This gauge is widely used for steam and compressed gases. The pressure indicated is the difference between that communicated by the system to the external pressure, and is usually referred to as the gauge pressure.
DISEDIAKAN OLEH:
ADAM MUQRISH 13DEM18F1049
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