Flow Measuring And Its Ways

Flow of what?

You measure flow with a "FLOW METER"!

Flow is the first derivative with respect to time of the position of some usually contiguous substance. Your question does not identify the substance, the amount of time or anything at all about location geometry. I suspect you do not understand a derivative, at least not yet.

You should now have a better but still insufficient understanding of what is needed to be known to attempt to measure flow with some kind of accuracy and precision. That is if you understand the difference between the accuracy and precision of a measurement.

You're asking about flow instrumentation.

One flow measurement/instrumentation tutorial that is particularly good at an introductory level is Mike Crabtree's Flow Handbook, which appears to be downloadable from here:

http://www.instreng.com/community/threads/mike-crabtree%E2%80%99s-flow-handbook-2nd-edition.3391/

Spitzer and Boyes have a power point presentation in pdf form that I believe was ISA presentation (ISA is the instrument trade organization), downloadable here:

http://www.spitzerandboyes.com/wp-content/uploads/2014/03/Slides-Flow-Measurement-Seminar.pdf

what is the deffrence between a rate and totalization in the measuring

Totalisation is the integral of rate with respect to time from reset until now.

One is the integral or summation of the other. In the reverse one is the derivative of the other.

• Rate = a measurement at a specific point in time.
• Totalization = a measurement over a specified amount of time like a 24 hour period.

Thanks for this information ,when We are installing a new flowmeter we can select them from option ????

I doubt it. You'd have to actually read the manual.

Of course I should read a manual , If I wanna install a new flow meter which points should I know , And each liquid or a gas has a speacial flowmeter for example for steam ,Air ...Etc

You need to take all the points into consideration.

1. Size of pipe?
2. Any flow restrictions?
3. Material being measured?
4. Viscosity of material?
5. What DATA do you NEED?

Take out a piece of paper and list all of your requirements then refer to the manual or call the meter manufacturer!

I think this is too advanced for Omar.

He needs to understand fluids, first.

I don't think he can relate fluid flow to electricity flow.

Maybe that's where his education should begin.

Thanks for your information.

For example if I have a steam and pipe 6inch and

viscosity.

You honor, I rest my case.

A peek at Aboos's history may be telling.

Another timely exposé...I bet your garden is immaculate...no weeds allowed ?

Aboosh,

If you would have included that information in your original question then you would already have an answer. We are not here to do your work for you. We are here to assist you in reinforcing the knowledge you already have and show you how to get the answers.

I know GOOGLE is a very powerful tool and that is where most of us look first, second and third at times.

Help yourself by doing the research.

When most of the contributors here needed information years ago, we had to head to our library or school to dig through books and catalogs just to find out where we could find the information we required.

The internet has made a generation of "instant gratification" and if you don't find your answer in the top 10 internet search results, then you assume that the information isn't available.

The people that strive, desire, crave knowledge and answers will not give up until they succeed in getting those answers.

Good luck.

A very patient and considered response..8/10

You need to have a good idea of the size of the pipe, what's in the pipe, and what the minimum and maximum temperatures and pressures are. You also need to know the minimum and maximum expected flow rates, and whether the thing needs a remote readout somewhere else. Start from there.

https://www.google.co.za/?gfe_rd=cr&ei=CU8BVfWbG5Gp8wep34C4Bg&gws_rd=ssl#q=flow+measurement+and+instrumentation

You better make good friends with Google, or suffer in ignorance for years...

An engineer is (commonly) as good as his library, and Google is by far, the best librarian

Rate: flowing quantity of a specific time unit.

Total : total quantity ,flow rate X time elapsed .

for example : you are having a bucket of 3 liters capacity .when you open the tap to fill it it takes 3 minutes so your flow was 1L/m and your total is 3L