Patent ID: 6354150
Filing Date: 2002-03-12
Classification: G01F

Abstract:
A sensor apparatus comprising:a mass flow meter having a main circuit suitable for fluid circulation therein; a capillary tube arranged in parallel to said main circuit, said capillary tube having an insulating layer deposited thereon; a heating means affixed to said capillary tube for heating a fluid passing therethrough; a first temperature measurement resistor affixed by a first deposit axial to said capillary tube onto an exterior surface of said capillary tube upstream from and separate from said heating means; and a second temperature measurement resistor affixed by a second deposit axial to said capillary tube onto said exterior surface of said capillary tube downstream of and separate from said heating means, each of said first and second deposits having a rectangular shape with a length dimension and a width dimension, said length dimension positioned so as to be parallel to a direction of the fluid flow passing through said capillary tube, each of said first and second deposits not being of a coil form.