Knowing how to accurately measure liquids and solids is a key part of everyday life.You have to know how much petrol is left in your tank and supermarkets certainly need to know what the average contents of their dry goods may be. Even in our leisure time, knowing how much water you’ve got to pump into the log flume from moment-to- moment is essential to ensure that the plastic tree really does gracefully slide down rather than smash to pieces at the bottom because the water level is too low.
Accurate level measurement is even more essential in many industrial processes upon which we all rely.At first sight, the only connection between brewing and pharmaceuticals might seem to be the fact that you’ll need some of the first if you consume too much of the second’s! However, both relay heavily on the use of advanced level switch technology to ensure continuous production to consistently high standards.In beer making, fresh barley is stored in tanks that can be as high as 20 meters for a couple of weeks.These silos are constantly being emptied and refilled and knowing exactly how much stuff you have in there at any given time is vital to getting the recipe right.
Similarly, in the pharmaceutical industry, most of the raw materials that constitute common prescription medicines are in powder, pellet or granular form.These dry ingredients are also stored in vessels of varying heights and for varying periods.Filling usually takes place pneumatically and the materials are drawn off on a conveyor, but knowing how much to draw off is vital to ensure the product is pure and is correctly constituted.
vibrating level switches – devices that hum like a tuning fork and give a constant means of monitoring solids levels – have made great inroads in all production processes. They work by having a tubular rod construction, within which is mounted a second concentric rod. The harmonic vibration between the two is driven and monitored by piezo crystals. When the rod is covered (i.e. when the desired level has been reached) the frequency and amplitude is damped and that change is detected by the piezo drive and signalled to the control centre.
If your production process involves liquids handling, there’s a high tech solution there too. Radar level transmitters for non-contact level indication will provide level measurement on almost any liquid whether in storage or during processing second-by- second.Radar level transmitters are non-contact and therefore versatile and extremely reliable.They’re ideal for use in liquids that would be too hot or too corrosive to measure by direct contact, like bitumen, molten metals or acids, and as they don’t physically make contact with the liquid they are very hygienic. And great for purified water vessels of monitoring level in desalination plants.
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