vortex cage meter

vortex cage meter

[′vȯr‚teks ′kāj ‚mēd·ər]
(engineering)
In flow measurement, a type of quantity meter which exerts only a slight retardation on the flowing fluid; the elements rotate at a speed that is linear with fluid velocity; revolutions are counted either by coupling to a local mounted counter or by a proximity detector for remote transmission.