Fluid flow indicator including a hall effect transducer

Details Fluid flow indicator including a hall effect transducer Fluid flow indicator including a hall effect transducer

1986-10-01

1989-05-02

Orsino, Joseph A.

Measuring and testing

Volume or rate of flow

Using rotating member with particular electrical output or...

73DIG3, 7386187, G01F 106

Patent

active

048257079

ABSTRACT:
An indicator for the rate of volumetric fluid flow includes a housing having a fluid passageway therein and a rotor contained in the housing in a position so as to be rotated by fluid flowing through said passageway. The indicator also includes a Hall effect transducer positioned outside the housing, responsive to the rotation of the rotor. The transducer produces an output signal corresponding to the rate of rotation of the rotor, and thus to the rate of fluid flow through the housing passageway. Preferably, the rotor is a paddle wheel disposed on an axle in the housing. The axle and thus the paddle wheel are retained in the housing by entrapment against a removable housing cover. The housing is otherwise mechanically imperforate to any connection between the rotor and the transducer. The indicator can preferably include a plurality of rotors having different hydraulic characteristics, that is, which rotate at different speeds for a given rate of fluid flow, such that replacement of one rotor for another changes the range of fluid flow rates over which the indicator is responsive.

REFERENCES:
patent: 2906121 (1959-09-01), Knauth
patent: 3636767 (1972-01-01), Duffy
patent: 4337655 (1982-07-01), Sundstrom et al.
patent: 4461174 (1984-07-01), Han
patent: 4512201 (1985-04-01), Konrad et al.
patent: 4534227 (1985-08-01), Petit
patent: 4565090 (1986-01-01), Gotanda

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