A flow meter assembly having a longitudinal axis includes an upstream member including a first end, a second end, and a fluid passageway extending between the first and second ends, a downstream member including a first end and a second end, and a first throat member including a first end, a second end, and a fluid passageway extending between the first and second ends, wherein the fluid passageway of the first throat member has a minimum diameter that is less than a minimum diameter of the fluid passageway of the upstream member, and the first throat member is configured to releasably coupleto the upstream member and the downstream member.