BigPatents India

Measurement of rate of flow of fluids was hitherto being carried out by using coriolis flowmeter, anemometer type mass flow meter, vortex flow meter etc, more recently flow sensor module with application- specific-integrated-circuit (ASIC) with a fluidic oscillation element and a differential capacitor pressure sensor, and a micro machined silicon torque sensor are being used for this purpose. Despite sensitivity and reproducibility of the result obtained, the aforesaid instruments require careful handling and periodic servicing apart from being costly and power-intensive. This invention aims at providing a low-cost , user-friendly viable alternative and relates a fluid flow sensor using centrifugal force type flow transducer , comprising: (A) a common balance swinging on a fulcrum (1) and having an weighing tray (2) and a second tray and a second tray (3) for placing weights (B) a hollow u-tube (4) carrying bellows (5) on the upper parts of both limbs and having two bent portions serving as inlet (6) and outlet (7) for the fluid flowing through it; (C) a soft iron core (8) attached to one of the pans (2) and capable of executing vertical movement in the upward or downward direction through an opening provided in the upper surface of an inductive pick-up coil in the form of a receptacle; (D) the said receptacle-form inductive pick-up coil (9) surrounding the soft iron body (8) is placed inside a laminated core (10) around the said pick-up coil (9), which carries lead wires (11) for attachment with a Maxwell’s bridge arrangement , and said laminated core in turn is provided with magnetic shielding (12) to eliminate any extraneous interference. (FIG.2,4).