by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect

Full Title

Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft > by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT; INDICATING DIRECTION OF MOVEMENT