Measuring liquid level using a differential pressure transmitter

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Uploaded by on Apr 1, 2009

In this video, we see a differential pressure transmitter used to infer liquid level in a plastic tank by meausring the air "backpressure" in a bubble (or dip) tube.

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Education

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Standard YouTube License

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Uploader Comments (BTCInstrumentation)

  • how can you sure there are no bubbles escaping from the dig tube into the tank of water ?

  • The air does indeed bubble into the tank, through the water. There isn't much air flow -- just a few bubbles per second.

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  • @istoleyourpie Evil Black Magic, that's how!

  • whicked , we're doing a huge project (cascade), we have 3 , 50 gallon tanks , 2 lever valves , 2 pumps , 1 drive , 3 bubbler systems (which includes the rotameters , DP cells (unfortunetly we dont have the "smarts" since they are all taken by other students , pressure regulators and a whole lot more goodies! I'll try to get a vid up when we're done!

  • how does the DP transmitter convert the pressure into an actual level. I.E. inches or % full etc.

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