Category Archives: Pressure

Pressure of fluid column

A vertical column of fluid exerts a pressure due to the column’s weight. The relationship between column height and fluid pressure at the bottom of the column is constant for any particular fluid (density) regardless of vessel width or shape. This principle makes it possible to infer the height of liquid in a vessel by measuring the… Read More »

How pressure switch work ?

A pressure switch is one detecting the presence of fluid pressure. Pressure switches often use diaphragms or bellows as the pressure-sensing element, the motion of which actuates one or more switch contacts. A pressure switch will be in its “normal” status when it senses minimum pressure (e.g. an applied pressure, or in some cases a vacuum condition). For… Read More »

Mechanical Pressure Element (Bellows,Diaphragm, Bourdon tube )

Bellows, Diaphagm, Bourdon tube each are mechanical pressure element which convert mechanical pressure in to force. This element will produce motion proportional to appiled pressure.   Increasing pressure inside a bellows unit causes it to elongate. see bellow in below figure   A diaphragm is nothing more than a thin disk of material which bows outward… Read More »