The diaphragm is a thin plate of circular shape clamped firmly around its periphery. Also, it can be called as very thin membrane under radial tension.
What is Bellows Pressure Gauge? Working, Diagram, & Advantages
Bellows is a longitudinally expansible and collapsible member consisting of several turns (convolutions) or folds. Thus, the bellows is a series of circular parts resembling the folds. Bellows has long length and it is made up of metal alloy, which ¡s ductile and retains its properties over long use. Commonly used materials are brass, bronze, beryllium, … Read more
What is Ionization Gauge? Working, Diagram, & Applications
lonization is the process of removing an electron from an atom producing a free electron and positively charged ion. Due to collision of high-speed electron from atom, ionization takes place in triode tube. An ionization gauge is used for measurement of very low pressure of the order of 1 micron and below. Construction of Ionization … Read more
What is Pirani Gauge? Working, Diagram, & Applications
Pirani gauge works on the principle that, “Thermal conductivity decreases with decreasing pressure.”
Construction of Pirani Gauge
Pirani gauge is also a thermal conductivity gauge, like thermocouple vacuum gauge. Pirani gauge consists of a heating filament enclosed in chamber. Heating element or filament is a platinum wire, which forms an arm of Wheatstone bridge. Refer the Fig. 1.
Fig. 1: Pirani Gauge.
What is Thermocouple Vacuum Gauge? Working, Diagram, & Applications
Thermocouple vacuum gauge operates on the principle of thermo-dynamics, which states that, “At low pressures, Thermal conductivity (Heat conductivity) decreases with decreasing pressure”.
Due to this property, thermocouple vacuum gauge can measure very low pressures, i.e. vacuum pressure (pressure below atmospheric pressure). Basically, thermocouple vacuum gauge measures the temperature of a heated element, called as heating filament surrounded by residual gas, connected to a vacuum system, whose pressure is to be determined.
What is McLeod Gauge? Working, Diagram, & Applications
McLeod gauge is a device used for the measurement of very low pressure. McLeod gauge comprises a system of glass tubing, in which, a known volume of gas at unknown pressure is trapped and then isothermally compressed by rising mercury column. This amplifies the unknown pressure and allows its measurement by conventional manometric means. It can measure the pressure of gas, which obeys the Boyle’s law i.e. P1V1 = P2V2.
Fig. 1: McLeod Gauge
What is Process Instrumentation? Definition, Block Diagram & Objectives
Process instrumentation is a branch of engineering, which deals with various types of instruments to record, monitor, indicate and control of various physical parameters such as temperature, pressure, PH value, level etc.
What is Synchroscope? Working, Diagram & Types
Synchroscope instrument is used to synchronize two alternators, which are to be connected in parallel with one another with bus bars to share the load. The synchroscope determines the exact instant where the conditions of synchronizing are satisfied. These conditions are:
What is De Sauty’s Bridge? Theory, Diagram & Derivation
The De Sauty’s bridge is used to measure a capacitance by comparing it with another known/standard capacitance. The circuit has the following components as shown in Fig. 1. Fig. 1: De Sauty Bridge. C1 = unknown capacitor. whose value is to be found out. C2 = a standard capacitor for comparison R3, R4 = non-inductive … Read more