The PR 6423 is a non-contact eddy current transducer with a rugged

construction and designed for extremely critical turbomachinery

applications such as steam, gas, compressor and hydro turbomachinery,

blowers and fans.

The purpose of a displacement probe is to measure position or shaft

movement without contacting the measured surface – the rotor.

In the case of sleeve bearing machines, the shaft is separated

from the bearing material by a thin film of oil. The oil acts as

a dampener and therefore the vibration and position of the shaft

are not transmitted through the bearing to the bearing case.

The use of case vibration sensors is discouraged for monitoring

sleeve bearing machines since the vibration produced by shaft motion

or position is greatly attenuated through the bearing oil film.

The ideal method of monitoring shaft position and motion is by

mounting a non-contact eddy sensor through the bearing, or

inside the bearing, measuring the shaft motion and position

directly.