Ultrasonic Water Flow Meter Accuracy

2 dandanzheng pengyongzhang tianshixu study of acoustic transducer protrusion and recess effects on ultrasonic flow meter measurement by numerical simulation flow measurement and instrumentation vol 22 pp 488 493 2011.

Ultrasonic water flow meter accuracy.

A relative accuracy a absolute accuracy. S full scale of the flow meter. Inline or clamp on get a bit more with a siemens ultrasonic flowmeter the sitrans fs ultrasonic flow portfolio empowers you with choice. In doppler ultrasonic flowmeters opaque fluids can limit ultrasonic wave penetration too near the pipe wall which can degrade accuracy and or cause the flowmeter to fail to measure.

For easy and cost efficient installation pick a highly advanced clamp on flow solution. Ultrasonic flow meters are inferential meters that uses ultrasonic technology to measure the velocity of an acoustically conductive liquid moving through it. If the absolute accuracy is 10 kg h the relative accuracy at full scale 1000 kg h can be calculated as. Transit time measures the time differential between signals sent upstream and downstream.

The new daniel 3418 8 path ultrasonic flow meter crafted developed and designed by emerson offers the highest accuracy and best in class performance coupled with the same high functionality required by sophisticated fiscal measurement users. Location ultrasonic flow meter 0 5 accuracy ultrasonic flow meter lrf 3300s sample book comparing with other traditional flowmeter or ultrasonic flowmeter it has distinctive features such as high precision high reliability high capability. The 3418 combines the power of two interlocked 4 path british gas design meters in one flow meter body. A a 100 s 1 where.

Therefore doppler ultrasonic flow meters are obviously better suited for aerated or impure water applications i e. Accuracy in percent of full span can be expressed as. Doppler shift and transit time. With the deployment of a reference standard flow measurement device the meter can be calibrated across a specific known flow range.

Transit time ultrasonic flowmeters can fail to operate when an opaque fluid weakens the ultrasonic wave to such an extent that the wave does not reach the receiver. The flow rate measurement that occurs in an ultrasonic water meter is critical to the accuracy of the meter. For maximum accuracy select from a diverse range of inline flowmeters. All water meters built upon the transit time ultrasonic principle require some kind of flow calibration.

By far the best reason to use an ultrasonic flow meter of any kind is the lower costs associated with installation. Example accuracy of flow meter in percent of full span. For example if a meter has a maximum velocity of 20 ft s and performs accurately over a turndown of 10 to 1 then you can divide 20 by 10 to find that the minimum velocity at which the meter will uphold its accuracy statement is 2 ft s.