Patent ID: 6634239
Filing Date: 2003-10-21
Classification: G01F,G01N

Abstract:
A system for determining a flow rate of a fluid passing through a conduit, the fluid having a direction of flow, the system comprising:a first transmitter and a first receiver disposed proximate the conduit and separated by a first fixed distance so that at least a portion of the fluid passes between the first transmitter and the first receiver; a second transmitter and a second receiver disposed proximate the conduit and separated by a second fixed distance so that at least a portion of the fluid passes between the second transmitter and the second receiver, the second transmitter and the second receiver being oriented at a non-perpendicular angle to the direction of flow of the fluid, and the second transmitter and second receiver being in communication with the first transmitter and the first receiver; and a trigger circuit at least indirectly connectable to at least the first transmitter and the first receiver, the trigger circuit configured to generate a triggering signal upon receiving a pulsed signal transmitted by the first transmitter.