Selection of radar, servo, ultrasonic, and magnetostrictive level gauges
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Currently, the main types of level gauges include radar level gauges, servo level gauges, ultrasonic level gauges, and magnetostrictive level gauges. But in petrochemical storage tanks, how are these devices chosen for use? Are there any regulations specifying when a particular type of level gauge must be used?
I haven’t heard of any standards specifying which type of level gauge to use; generally, the choice of gauge type is determined based on parameters such as the design of the process equipment, the medium involved, temperature, and pressure.
There are no rules specifying which type of gauge must be used in a given situation; the selection of a gauge is a matter of experience, requiring consideration of many factors, as well as an understanding of the working principle and appropriate applications of each type of gauge. Servo systems offer quite high precision but are expensive; they are generally used in storage tanks for trade and measurement purposes in tank farms. Ultrasonic sensors are susceptible to interference, so they are suitable for measuring the level in sewage tanks or in situations where low precision is sufficient, especially when dealing with non-volatile substances. Of course, vacuum negative-pressure containers cannot be used. Magnetostriction offers high precision; it is generally used for measuring interfaces and cannot be applied to materials that tend to crystallize. It is widely used in radar systems and can be applied in most situations. I’m also a beginner – that’s basically all I can say. I’m going to get a stool and watch as the experts down below provide answers: lol :lol This post was last edited by hwindforce on 2009-2-27 at 14:36
The answer above is correct. Servo systems are likely only used in large state-owned enterprises; in other words, they are employed in projects that require significant investment. Ordinary chemical storage and transportation companies simply cannot afford to purchase such systems. Radar measurement is more commonly used, and I’ve never seen any storage or transportation company in the Wuxi area use radar systems. Sometimes, pressure transmitters are used to measure liquid levels instead
I’ve never seen any system that uses servos; most use radar, or even pressure transducers to measure liquid levels. I made a typing mistake just now
Is a servo something like that? Could some expert explain what the principle is?
There is no rule specifying which form must be used in a given situation; it is mainly decided based on one’s own experience.