It is best to think of the sensor as a combination of a meter and transmitter. Servicing and calibrating them as a set is always the best idea. However, if it becomes necessary to replace a transmitter in the field, it is best to confirm that you have a proper match of meter to transmitter. There are several alternatives for the rotating piece within the meter and each family of transmitter will only respond to the proper meter type. In addition, there are phasing and scaling changes which should be discussed with a Max technician to maintain the optimal, meter performance.