Kui düüsvoomõõturi voodüüs asetatakse torusse, milles vookiirust mõõdetakse, põhjustab voodüüs rõhulanguse, mis muutub vastavalt vookiirusele ja seda rõhulangust mõõdetakse rõhutajurite abil ja düüsvoomõõturi kalibreerimisel muutub see rõhk vookiiruse väärtuseks.
When a flow nozzle of a nozzle flow meter is placed in a pipe carrying whose rate of flow is to be measured, the flow nozzle causes a pressure drop which varies with the flow rate, and this pressure drop is measured using a differential pressure sensor and when calibrated this pressure becomes a measure of flow rate.
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