A magnetic flowmeter for measuring flow of a process fluid includes a meter body having an opening formed therein. The meter body is configured to be inserted in-line between process piping which carries the process fluid. A moveable extension is coupled to the meter body and configured to extend into the process piping. A coil of wire is carried by the extension and configured to generate a magnetic field. A pair of electrodes sense an EMF in the process fluid generated as a function of the applied magnetic field and flow of the process fluid.