How to measure sparkling liquids
There are many industries that present the need to measure levels with total accuracy. Food or pharmaceuticals are clear examples of this, but it is not always so easy and even less if we refer to means to measure the sparkling liquids. The production process requires a thorough monitoring of quantities of raw materials used and therefore, different techniques and technologies come into play to know how to measure or monitor fluid levels in the industrial sector.
Obviously, the processes are completely different from each other. This makes the measurement of the same type of matter has different methods. In the case of liquids, there are more than twelve measurement technologies. Ultrasounds, float-based technologies, and radar are some of the most widely used today.
The solution: magnetostrictive float technologies
Measuring a liquid through a biphasic medium generates problems both in ultrasonic media and in guided wave radar, due to the divergence of the waves that are emitted, which make it difficult to obtain an exact measurement. These are liquids that generate foam when shaken in the production process, or due to the same process. Decide where the foam ends and the liquid begins it is not an easy task.
However, magnetostrictive float technologies they operate using as reference a float attached to a stem. This allows them to make an accurate reading and calibrate fluid levels, exactly. Even when it comes to sparkling media. These are challenges that companies of the caliber of Beamex must face, introducing new technologies and calipers that allow greater precision in all measurements.
The importance of knowing the specific gravity in advance
When using float level measurement technologies, it is required to know the density of the fluid. Taking into account the specific gravity it is possible to define the type of float suitable for the liquid for a particular instrument. In these cases the foam will not cause any problem, since the float sinks in it, but floats in the liquid.
It should be avoided at all costs that some foam ruin the exactitude in the instrumentation of a process. In an age of sophisticated technologies such as the process calibrator, this should not happen in any case if we use a calibration software quality.
How is this measurement process?
In the case of level sensors based on the high resolution magnetostrictive principle, these are used to measure levels in liquids determining the position of a magnetic float.
The measurement begins with a current pulse that creates an axial magnetic field along a magnetostrictive wire. The float has a series of permanent magnets, and when the impulse reaches the float, both magnetic fields interact, generating a torque on the thread.
In this way, the time that has taken place from the sending of the current impulse to the reception of the torsional wave is measured, which in turn makes it possible to calculate the position of the float, with a high level of reliability. Keep in mind that the capacity of some guided wave radar systems For the measurement of liquids with foam it is only growing, but they are becoming more expensive and have more limitations than magnetostrictive float level measurement systems.
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