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Level Measurement

Magnetostrictive Level Measurement

S Bharadwaj Reddy
A variation on the theme of echo-based level instruments, where the level of some process material in a vessel is measured by timing the travel of a wave between the

Capacitive Level Measurement

S Bharadwaj Reddy
Capacitive level instruments measure electrical capacitance of a conductive rod inserted vertically into a process vessel. As process level increases, capacitance increases between the rod and the vessel walls, causing

Guided-Wave Radar Instruments Diagnostics

S Bharadwaj Reddy
Modern radar level instruments provide a wealth of diagnostic information to aid in troubleshooting. One of the most informative is the echo curve, showing each reflected signal received by the

Radar Level Measurement

S Bharadwaj Reddy
Radar level instruments measure the distance from the transmitter (located at some high point) to the surface of a process material located farther below in much the same way as

Displacer Interface Level Measurement

S Bharadwaj Reddy
Displacer level instruments may be used to measure liquid-liquid interfaces just the same as hydrostatic pressure instruments. One important requirement is that the displacer always be fully submerged (“flooded”). If

How Buoyant Force instruments Works ?

S Bharadwaj Reddy
Displacer level instruments exploit Archimedes’ Principle to detect liquid level by continuously measuring the weight of an object (called the displacer ) immersed in the process liquid. As liquid level

Differential Pressure Transmitters Compensated Leg Systems

S Bharadwaj Reddy
Differential Pressure Transmitters Compensated Leg Systems The simple and direct relationship between liquid height in a vessel and pressure at the bottom of that vessel is ruined if another source

Basics of DP Transmitter Suppression and Elevation

S Bharadwaj Reddy
Transmitter Suppression and Elevation A very common scenario for liquid level measurement is where the pressure-sensing instrument is not located/installed at the same level as the 0% measurement point. The

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