A sensor device and a method of making a sensor device. The sensor device includes a coil arrangement including a primary coil and a secondary coil. A conduit that is traversable by a flow in a figure-8 pattern is disposed as a yoke about the coil arrangement such that the coil arrangement is disposed in a vicinity of an intersection of the figure-8 pattern. The conduit includes at least two parts. A parting plane of the two parts is configured so as to enable the coil arrangement to be slip-fit mounted on the conduit before the two parts are joined together.