Fluid measurements refer to the volume or capacity system in units that measure liquid substances like oil, milk, water, etc., in a vessel. Choosing the suitable media and vessel for fluid measurement will help obtain the most accurate and reliable readings.
As we all know, high accuracy level reduces chemical variability processes, which helps in reducing the costs and wastes, thus increasing the quality of the product being measured. There are various methods of fluid measurements characterised by their operational principle and area of applications.
This article will help you with some methods of fluid measurement you can always choose from for you to obtain accurate results.
1.Ultrasonic level transmitters
Ultrasonic level transmitters measure the fluid levels for printing chemicals, wastewater, and acids since it is a no-contact technology. They do this by measuring transducer distance and the time taken on the surface for a pulsed ultrasound to move from the surface occupied by the fluid to the transducer and back.
Ultrasonic level transmitters are not suitable to measure foamy and slurry fluids since they are less sensitive to media and can provide less accurate results for these fluids.
2. Load cells
Load cells can have one or more sensors for sensing any destruction in the system supporting the measurement. It creates a signal for the output that displays data about fluid measurements after measuring the subsequent substance’s mechanical force, weight, or load.
When you place a load cell on the vessel’s support structure to measure the fluid,
it increases the process in the vessel with an increase in the force in it. The devices are designed to measure the fractional ounces to tons hence can be employed in many applications due to their non-contact operational feature.
Using a load cell may be expensive in connecting the pipes and designing the vessel’s structure, which is always a disadvantage. To obtain the most accurate results, you should ensure that the weighting load requirement system is preserved from the initial vessel and the pipe system.
3. Continuous float level transmitters
Continuous float level transmitters work by sending a vibration from the rod to the sensor using a dip-stick suspended inside the vessel. It uses magnetostrictive level designs to restrict the float and determine the fluid level that was initially measured.
Magnets from the floats destroy the electric pulses from the sensor through the rod, where it records the time of the impulse vibration to record the fluid level measurement.
It also uses resistive level sensors with the same magnetic float and rod, which have switches that contain resistors. The falling and the rising of the float make the switches close and change the circuit resistance, which shows the float position to the sensor.
Continuous float level transmitters usually give the most accurate results of foam measurement and typical applications. However, the accuracy may be affected by the buoyancy and temperature or a need for a contact media level.
4. Radar level transmitters
Here, there is always the measurement of the time taken by the pulse in returning to the sensor. The method is non-content, and it uses an electromagnetic pulse on the surface occupied by the fluid flow—the level of the fluid increases when there is a quick return of the pulse.
The method can measure fluids in a vacuum without causing any calibration, which may remove false echo from the vessel, and works better in metal vessel media. The system can also operate when there is a variation in vapor temperature or dirty and explosive material.
However, It may not be applicable for measuring more fluid density below the floating level or in many thanks since it is heavy to carry from one place to another. A lot of time is also required in installing and managing this method.
5. Differential pressure transmitters
Differential pressure transmitters are fluids measurement methods that determine the fluid level by constructing a reference port to the above maximum fill level vessel port. The location of the vessel and the physical condition of the process determines the need for bubblers and fluid purges, and you should connect the pipes well.
The fluid level is indicated by the differential pressure after the signal output about the measurement has been calibrated.
6. Radiofrequency level transmitters
It determines the level of slurries, fluids with different densities, and granules. Radiofrequency level transmitters map the contours using electricity on the surface. The sum of the areas inside the probe is the volume of the fluid, which has one or more conductors. The conductors usually keep electric charge which can be affected by the non-conductive fluid or the medium or measurement.
The capacitance of the vessel wall and the probe is less affected by air, leading to the probe’s ability to send a signal to the sensor when measuring insulating property. The method requires regular cleaning and maintenance for one to obtain accurate results.
The method of fluid measurements varies with the type of applications and fluid type involved. You should choose the most appropriate method to obtain accurate and reliable results of the fluid or liquid under study.