The Differential-khatello flowmeter e entsoe ka sesebelisoa sa throttling, transmitter e fapaneng le accumulator ea phallo.THe throttling device ke ntho ea mantlha e kentsoeng pompong, e sebelisoang haholo ho lekanya phallo ea mefuta eohle ea likhase.(e leng e hloekile kapa e na le lerole), mouoane(e leng e tletse kapaho chesa haholo) le lintho tse metsi (tse tsamaisang kapa tse sa tsamaisaneng, tse senyang ka matla, tse khomarelang, tse silafetseng kapa tse nang le likaroloana, jj..), le e ka lekanya phallo ea molumo kapa phallo ea boleng ka kotloloho.