A flow detector with magnetic sensor

摘要

A flow detector for a liquid circulating in a plant comprises an elongated internally hollow body (1), provided with an inlet opening (2) and an outlet opening (3), a member (5) carrying a permanent magnet (6) and axially movable within said body (1), and a magnetic sensor (8) laterally located on said elongated body, <??>The magnet (6) is mounted at one end of said movable member (5) so as to accomplish a displacement between a first and a second position causing a sign inversion of the magnetic flow ( PHI ) that crosses said sensor (8). <IMAGE>