Selection of level gauges for tanks containing major hazardous materials such as liquefied petroleum gas, liquid chlorine, and liquid ammonia
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The last edit to this post was made by yuchenchf on 2015-12-8 at 08:16. 1. The advantages of glass plate level gauges are their intuitive and reliable display, as well as their ability to withstand high temperatures and pressures； Simple structure, durable. The disadvantages are poor accuracy, excessive bulk, false liquid levels that often occur in summer, as well as the lack of signal output, which prevents remote control. 2. The advantages of the differential pressure level gauge are its simple structure, easy installation and maintenance, and small size. The downside is that the density of liquefied gas changes with temperature, which affects accuracy ； 3. Private-use level gauges have the advantages of high precision, the ability to overcome the effects of certain adverse operating conditions, and broad applicability. Their disadvantages are high cost and difficult installation and calibration. 4. Surface-mounted level gauges offer high precision; they can be installed without opening the tank, are easy to maintain, are not prone to leaks, and are safe and reliable. The downside is that it cannot be used to measure double-walled tanks or media with a large amount of sediment, and it also requires certain installation space at the bottom of the tank. Feel free to provide additional comments or corrections~!
For media such as liquefied petroleum gas, liquid chlorine, and liquid ammonia, non-contact measuring instruments—external level gauges—can be used. There are quite a few customer use cases for these media at present. External level gauges are particularly suitable for pressurized, high-pressure tanks, and **highly corrosive media. No drilling is required on the storage tank at all; it is simple and easy to install, and can be installed during normal production operations. Later instrument maintenance is also simple. It is a good ideal way of measurement.
I guess what you mean are large storage tanks, which basically use servos, some use differential pressure, and multi-point temperature compensation
One can only choose the most suitable option based on the conditions; there is certainly no perfect choice
Why not consider radar, magnetostrictive effect, radio frequency admittance, and so on?