MAGNETIC PICKUP ELEMENT ADAPTER FOR FLOWMETERS

摘要

An apparatus are provided for reducing the non-linear readout characteristics of such magnetic sensing and measuring devices as turbine type flowmeters. An adapter bushing is used to mount an electromagnetic pickup element within a turbine type flowmeter. The body of the meter into which the pickup element is mounted consists of a material having a low permeability, while the adapter consists of a ferromagnetic material having a high permeability. In operation, the electromagnetic pickup element is disposed within the body of the device adjacent a moving member which is to be monitored. The surrounding adapter functions to shape the flux lines generated by the pickup element into a path having a low flux density in the area adjacent the moving member which low density, in turn, reduces the magnetic drag on such member.