What factors should be considered regarding ultrasonic flowmeter working condition ?

Date:2018-12-29 From:
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1) Liquid Medium: It is essential that the type of fluid is known and also that there are no air bubbles and that the solid content does not exceed 5%
 
2) Pipe Condition: The pipe wall exterior should be free from dirt, paint or corrosion. For optimum accuracy the interior wall should also be free from deposits or corrosion.
 
3) Location: At least 10D (10 times diameters) of straight-length pipe work must exist upstream of the measurement point, and 5D downstream. 
Ideally these distances should be as large as possible.
 
4) Wall Thickness: For optimum accuracy, the pipe wall thickness should also be measured.  An ultrasonic wall thickness gauge can be used to measure wall thickness.