rootormõõtevahend, mille mõõtmed on toru läbimõõduga võrreldes väikesed ja mille pöörlemissagedus sõltub vedeliku, millesse see on sukeldatud, kohalikust kiirusest
device fitted with a rotor, the size of which is small in comparison with the size of the conduit and the rotational frequency of which is a function of the local velocity of the fluid in which it is submerged
