Abstract: A magnetic coupling is provided for a fluid flowmeter wherein the magnetic coupling includes a first and a second magnet assembly. The first magnet assembly includes a plurality of magnets coupled to the counter mechanism of the flowmeter, and the second magnet assembly includes a plurality of magnets coupled to the propeller. The two magnet assemblies are constructed and located so that they magnetically influence one another, and when the propeller rotates the second assembly, the first assembly is driven to rotate thereby driving the counter.

Abstract: An assembly for an ultrasonic flowmeter apparatus includes a housing having first and second opposite ends, an inlet and an outlet, a tube within the housing to define a passage in the housing, a wall within the housing to support the tube and to partition the housing into first and second plenums which are in flow communication through the passage of the tube and ultrasonic transducers mounted at the opposite ends of the housing to transmit ultrasonic signals in an axial direction through the tube.