The two common types of manometers are the equal limb type and unequal limb type.A simple manometer is one which consists of a glass tube, whose one end is connected to a point where pressure is to be measured and the other end is open to atmosphere.Piezometer is one of the simplest forms of manometers. The pressure at point A is given by 1. But if positive pressure is applied to one of the legs of the U-shaped tube, then the level of liquid will fall in that leg and rise in the other leg.

Following are the benefits or advantages of Manometer: It is simple in construction.

This is because the pressure will force the fluid to fall in the one leg and rise in the other until the weight of the column of fluid that results from the applied pressure is enough to oppose that pressure value. The actual pressure is the height, H.  No calculations are required as the scale is set by the manufacturer to give accurate readings A dual tube manometer is a manometer that is designepressures. He also likes to write articles related to the mechanical engineering field and tries to motivate other mechanical engineering students by his innovative project ideas, design, models and videos.FRL unit • U-tube manometer • Well type manometer • Raised Well manometer • Inclined Tube manometer Benefits or advantages of Manometer. Filter, Pressure Regulator, and Lubricator are combined in a unit.

Similarly, lowering the density of the manometric fluid, also called the indicting fluid, will decrease the pressure range but increase its sensitivity.To perform measurements on very low pressures, there are additional types of pressure transducer styles used, including a Pirani gauge, thermocouple type transducer, and ionization gauge. This arrangement results in a smaller movement of the fluid level in the larger leg when exposed to pressure, effectively allowing the use of a single scale to read to obtain the pressure value, as opposed to two scales in the U tube style.Inclined Manometers as the name implies are designed with a tube that does not sit vertically, but rather at a shallow angle relative to the horizontal plane. The sides are next to a scale. The purpose of using mercury as the manometeric fluid is that their specific gravity at various temperatures are known exactly and they dont stick to the tube.

Inclined Manometers as the name implies are designed with a tube that does not sit vertically, but rather at a shallow angle relative to the horizontal plane. By using this site, you agree to our Piezometers can measure gauge pressures only. Gauge pressure is presenting the difference between the measured value of pressure and the local atmospheric pressure (think in terms of a tire pressure gauge). Common fluids are shown in Table 1, below, which are sometimes referred to as manometric fluids.

See Along the tube’s middle portion are graduations.

Common uses include:This article presented a brief review of manometers and how they work. Hence, the vertical distance between the level of the fluid in the two legs of the tube represents a measure of the amount of pressure being applied. All Rights Reserved. As the name suggests, an inclined manometer involves a gradual incline in the design. On the sealed side, a vacuum condition exists which represents absolute zero pressure sealed by a column of mercury. It can be used for measuring moderate pressures of liquids. The inclined limb manometer is another device for measuring very low pressures. An inclined manometer has an advantage in readability.