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 […]
What is Bellows Pressure Gauge? Working, Diagram, Construction & Advantages Read More »
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
What is Float Level Sensor? Working, Diagram, Construction, & Advantages Read More »
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.
What is Diaphragm Pressure Gauge? Working, Diagram, Construction, & Advantages Read More »
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
What is Bourdon Tube Pressure Gauge? Working, Diagram, Construction & Advantages Read More »
Hay’s Bridge method of measurement is particularly suited for the measurement of inductance having high Q Values. Figure 1: Hay’s Bridge.
What is Hay’s Bridge? Circuit Diagram, Derivation & Advantages Read More »
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
What is Maxwell’s Bridge? Circuit Diagram, Derivation & Advantages Read More »
A Pirani Gauge is a type of thermal conductivity gauge used to measure low vacuum pressures. It operates based on the principle that the thermal conductivity of gases changes with pressure. This gauge is widely used in vacuum technology due to its simplicity and reliability in measuring pressures from 0.5 Torr to 10-4 Torr.
Figure 1: PMMC Instrument. Working Principle of PMMC Instrument When a current carrying conductor is placed in a magnetic field the force is produced on the conductor (coil). This force tends to move the coil in the space.
DC voltmeter like PMMC meter works on DC supply but this meter can work on AC supply as if it is a AC voltmeter. Figure 1. What is required is an additional device to be connected between AC supply and PMMC meter is a Rectifier unit. If single diode is used as a rectifying unit for
What is an AC Voltmeter? Circuit Diagram, Working and Types Read More »