Measuring liquid depth using pressure instruments

摘要

One of the simplest and most reliable ways of measuring liquid depth is via pressure. This article, and its accompanying video demonstration, offer some practical suggestions. If you want to measure the level of liquid in a tank, one of the simplest approaches is to use a pressure gage. The fact that liquid has weight means that you can measure that weight in the form of pressure. If you drill through the side of a tank and insert a gage, the reading can be translated into the depth of liquid above the gage.