instrument that measures current
• (n.) An instrument for measuring currents, especially the force or intensity of electrical currents; a galvanometer. • (n.) An instrument for measuring the velocity of the blood current in the arteries.
Rhe·om'e·ter noun [ Greek 
Type: Term Pronunciation: rē-om′ĕ-tĕr Definitions: 1. An instrument for measurement of the rheologic properties of materials, of blood. 2. A galvanometer.
rheometer An instrument for measurement of the rheologic properties of materials, e.g., of blood.
noun an instrument for measuring the flow of liquids (especially arterial blood)