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Level

Instrument Hire

Gyros, Accelerometers & IMU'S

Gas Detectors

 Test & Calibration Air Flow & Environmental Chart Recorders

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news / new products

links
Selection of the Measuring Point for Ultrasonic Flowmeters
 
Select the measuring point so that the sound waves from the transducers propagate the pipe horizontally.
(Solid particles are deposited on the bottom of the pipe, gas pockets can develop at the top.)
Correct
Incorrect
Free inlet or outlet pipe sections
Select the measuring point at a location where the pipe cannot drain out.
Correct
Disadvantageous
Correct
Disadvantageous
Vertical pipe
Select the measuring point at a location where the liquid flows up.
(Pipe completely filled)
Correct
Disadvantageous
 
Distances between Measuring Point and Disturbance Source
In the following examples, recommended straight inlet and outlet pipe lengths are given for different types of flow disturbance sources to assist in selecting the correct measuring point.
D = Nominal pipe diameter at measuring point
L = Recommended distance
Disturbance source: 90 °-elbow
Inlet L>=10D
Outlet L>=5D
Disturbance source: 2 x 90 °-elbows in one plane
Inlet L>=25D
Outlet L>=5D
Disturbance source: 2 x 90 °-elbows in different planes
Inlet L>=40D
Outlet L>=5D
 
 
Disturbance source: T-section
Inlet L>=50D
Outlet L>=10D
Disturbance source: Diffuser
Inlet L>=30D
Outlet L>=5D
Disturbance source: Reducer
Inlet L>=10D
Outlet L>=5D
Disturbance source: Valve
Inlet L>=10D
Outlet L>=40D
Disturbance source: Pump
Inlet L>=50D
link to Selection of the Measuring Point pdf

 

 

Level

Instrument Hire

Gyros, Accelerometers & IMU'S

Gas Detectors

 Test & Calibration Air Flow & Environmental Chart Recorders

Terms & Conditions

news / new products

links
Measurement, Control & Data Acquisition
 
  

Request a Quotation
Click here to send us your inquiry for our immediate attention

Or call us now on
+44 (0)8700 434040

Call us free on Skype: omni-info

  

Order a Catalogue

Download our free engineering
 units converter !

  

UK / Europe Office
Tel +44 (0)8700 43 40 40
Fax +44 (0)8700 43 40 45
info@omniinstruments.co.uk

East Kingsway Business Centre
Mid Craigie Trading Estate,
Mid Craigie Rd, Dundee,
DD4 7RH, Scotland, UK
  
 
USA / Canada Office
Tel +1-866-849-3441
Fax +1 866 628 8055
info@omniinstruments.net
www.omniinstruments.net
 
Australia / Asia Pacific Office
Tel +61 (0)282 442 363
Fax +61 (0)294 751 278
info@omniinstruments.com.au
www.omniinstruments.com.au


we also accept purchasing cards