Abstract: A flow sensor assembly comprising a first substrate, a flow sensor located over the first substrate, a lid located over the first substrate and the flow sensor, a flow inlet channel, a flow outlet channel, and an overmold laterally encircling the flow sensor. The overmold is in contact with the side walls of the flow sensor, and extends between the flow sensor and the lid such that the overmold, the flow sensor, and the lid define a flow sensing channel between the flow inlet channel and the flow outlet channel. the lid and the encapsulation cooperate to define the flow inlet channel and the flow outlet channel.