Abstract: A medical flow sensor module assembly is part of an installation for patient monitoring and/or patient care. A single-use sensor module has a channel body with a flow channel A flow sensor is used to measure a fluid flow through the flow channel A flow sensor interface is in signal connection with the flow sensor. A reusable housing module of the module assembly serves to accommodate the sensor module. The housing module has at least one electronics unit and an electronics unit interface via which the electronics unit is in signal connection with the flow sensor interface. The housing module has at least two housing sections which enclose the sensor module in a form-fitting manner. This results in an assembly that can be used cost-efficiently.