G - Physics
01
F
73/137, 73/53
G01F 1/10 (2006.01)
Patent
CA 1039970
Abstract of the Disclosure The invention relates to a flowmeter, particularly for measurement of fuel-flow rates to engines, having a bore within a glass tube surrounded and supported by a body with axially disposed fluid inlet and outlet ports, a rotor in the glass tube with a hub carrying helical vanes substantially filling the cross-section of the bore and a light source with an associated photo-responsive device arranged so that the vanes of the rotor interrupt the light beam to produce an electrical output signal with a frequency component proportional to the speed of rotation of the rotor, the glass tube with the fuel forming a lens which tends to converge the light beam. This device provides a flowmeter which will have improved response to low fluid flow rates and which will provide improved temperature characteristics and resistance to corrosive effects over a long period of use.
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