In rotameter, the area of flow is measured in such a way that the head differential is constant. Hence rotameter is called variable area meter or area meter. Rotameters are widely used for metering purge flows, pump-seal fluid and coolants and lubricants for operating machinery. Figure 1: Rotameter.
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Figure 1: Coriolis Flow Meter. The coriolis flowmeter is primarily used to measure the mass flow rate of liquids, and in some cases gas flow measurements. The construction of coriolis flow meter is shown in Fig. 1. It consists of either a pair of parallel vibrating tubes or else a single vibrating tube that is formed
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Figure 1: Bellows Pressure Gauge. Working and Construction of Bellows Pressure Gauge The bellows pressuree gauges are used for the measurement of absolute pressure. It is more sensitive than Bourdon tube gauges. It is generally used for the range down to 155.1 mm Hg (3 psi). It may be used for even lower pressures upto
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Figure 1: Float Level Sensor. Working and Construction of Float Level Sensor The float type level indicator is shown in Fig. 1. A float rests on the surface of liquid and follows the changing level of liquid. The movement of the float is transmitted to the pointer by a stainless steel or phosphor-bronze flexible cable
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Diaphragms are widely used for pressure measurements particularly in a very low ranges (0 to 4 mmHg). They can be flat, corrugated or dished plates and the choice depends on the strength and amount of deflection desired.
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Figure 1: Bourdon Tube Pressure Gauge. Working and Construction of Bourdon Tube Pressure Gauge The Bourdon tube is the most frequently used pressure gauge because of its simplicity and rugged construction. It covers ranges from 0-15 psig to 0-100,000 psig, as well as vacua from 0 to 30 inches of mercury. It consists of a
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Hay’s Bridge method of measurement is particularly suited for the measurement of inductance having high Q Values. Figure 1: Hay’s Bridge.
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Maxwell’s Bridge method is used for measuring an unknown inductances of low Q values. It measures unknown inductance in terms of known capacitance. The circuit of Maxwell’s bridge is shown in Fig. 1. One arm of the bridge has resistor R1 in parallel with capacitor C1. The unknown inductor Lx with series resistor Rx is
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Electroplating is the process in which a layer of some metal is deposited for decorative or protective purposes on the articles of other base metal by electrolysis.
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Metallic conductors carry an electric current without any change in their physical and chemical state, except, perhaps, a rise in temperature. However, there are some liquids which can conduct an electric current, but the passage of current through them is always accompanied by a chemical change. Such liquids are known as electrolytes. Various chemical compounds
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