Storage vessels form a crucial part of any fluid control process.
Burkert Level sensor – Accurate level detection, essential to enable the process controller to maintain normal levels also provide warnings.
In some cases the process may involve very aggressive media or potentially explosive atmospheres, which would require careful specification of the level sensing equipment.
The ultrasonic level sensor, probably the most widely used non-contact sensor, very versatile used to calculate volume also flow rates in open channels.
Measurement, involves short ultrasonic pulses, reflected off the surface of the media also measured distance, read as continuous level measurement.
Burkert Level sensor, for aggressive media also modern designs allow for precise measurement, even in vessels containing built-in fixtures.
Sensors can be specified to measure a wide range of distances as well as for operation within Ex-designated areas.
For applications requiring level measurement over a greater distance, then the use of radar level transmitters may be required, with capabilities up to 30 meters.
These devices, usually well protected and suitable for operation with aggressive media also high pressures and hygienic applications.
The principle of measurement, similar to the ultrasonic sensors but using very short radar pulses instead.
The guided microwave level transmitter, designed to operate with aggressive media, under high pressure, especially over larger distances.
A high frequency microwave pulse – guided along a steel cable or rod.
When the pulse reached the media surface, its reflected back and the internal electronics interpret the time taken into a distance.
These sensors provide a continuous reading of the media level with the vessel.
Usually manufactured from stainless steel, the transmitters have ingress protection ratings of IP66+, also Ex versions where appropriate.
Some sensors incorporate a visual display of the level also providing the level signal to the process controller.
For turbulence, air bubbles or varying products, the tuning fork level sensor can detect overfill also to prevent dry-running.
A peizo-electrically energised tuning fork, vibrates at its mechanical resonance frequency of approximately 1200 Hz.
When the fork’s submerged in the media, the frequency changes and detected by the internal oscillator and converted into a digital output signal.