How to detect oil density

A reader asks our panel of experts what the best method to detect oil density would be. Here is what our experts had to say

Question

Best method to detect oil density: Which technology does the oil industry use for inline, oil density measurements?

Francoise Lee

Answer

There are a number of methods. The newest and probably one of the most frequently used nowadays is Coriolis, but you can also use the old-fashioned method of having a slug catcher or other vessel fill to a certain level measured via level switches, then use a DP cell to measure the liquid pressure, which due to the fixed height is equivalent to the density. This is the old-fashioned knock system.

There also are ultrasonic and level sensor applications, so the big issue is to decide where the measurement will be taken, the complexity of the equipment and/or accuracy required.

Alex (Alexandro) Varga

I'm sure there are several analyzers that are specifically designed to provide very detailed oil component analysis. However, if all you need to measure is density, then I suggest a Coriolis meter, which gives you density, temperature and flow in one meter. It is reliable and can be very accurate if the proper manufacturer/model is selected. If the line is large, you can save money by placing a much smaller-sized meter on a small recycle stream.

Hunter Vegas

Download our beginner's guide to differential pressure level transmitters

 

Free Subscriptions

Control Global Digital Edition

Access the entire print issue on-line and be notified each month via e-mail when your new issue is ready for you. Subscribe Today.

controlglobal.com E-Newsletters

Biweekly updates delivering feature articles, headlines with direct links to the top news stories that are critical to staying up to date on the industry — company news, product announcements, technical issues and more. Subscribe Today.