A fluid monitoring assembly for measuring the flow rate of a fluid includes a flexible conduit comprising a wall that defines a lumen through which the fluid passes. In one embodiment, a flow sensor is removably secured around the outside of the flexible conduit, the flow sensor having one or more transducer/receiver pairs. The assembly includes a housing having first and second portions connected to one another at a hinge, the first and second housing portions each defining respective recessed interior portions that define a cavity that is configured to encapsulate and retain the flow sensor and flexible tubing contained therein. In an alternative embodiment, the flow sensor is directly embedded or integrated into the housing.