Posts Tagged dp level transmitters
In an ideal world there would be a perfect liquid level measurement system that would work for every liquid and every application. Unfortunately, that product does not yet exist, leaving operators and technicians to go through the trial and error process of finding the level instrumentation that will work for them.
So in this high-tech world, is there still a need for the old faithful pneumatic systems like air bubblers? The answer is YES! Why? Because air bubbler systems work when other systems fail.
Air bubbler systems will work with the more difficult of liquids such as…
People have asked me about setting fault alarms in level transmitter analog signals at 2mA or 3mA levels. What they typically don’t understand is that a two-wire transmitter uses the electrical current below 3.6 mA for its own power and operation. So, a 2.0 mA or 3.0 mA fault indication just isn’t possible. At these low currents, there wouldn’t be enough power to generate the fault indication signal and to keep the transmitter functioning properly. Read the rest of this entry »
Since Lesman started focusing on level instrumentation 15 years ago, we’ve seen a lot of change. High-tech solutions bring higher accuracy, the ability to automatically eliminate tank obstructions for fewer false readings, the ability to measure level in almost any medium, and even send data from remote tank level systems to a control room miles away.
So is there still a need for more traditional, pneumatic systems, like air bubblers? Absolutely! And why? Because there are still applications where DP, capacitance, ultrasonic, and radar level systems just won’t work.