Measuring systems with eddy current sensors as PR 6422, PR 6423, PR 6424; PR 6425 and PR 6426 serve in conjunction with eddy current converters as CON 011, CON 021, CON 041, the transmitters with integrated converters of the MMS 3000 series or the transmitter CSI 9360 the measurement of mechanical quantities, such as shaft vibration, shaft displacement and speed (not if CSI 9360 is used).

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.

The PR 642x series includes five eddy current sensor types in different variants as shown in chapter Order Matrix.Which sensor type is applicable for a measuring application depends on several requirements as desired measuring range, available measuring track, and maximum environmental temperature.

The characteristics of the measuring chain are adapted to the material mainly used for turbo machinery (reference material: 42 Cr Mo 4, according to SAE 4140). The standard adjustment of the measuring chains is generally related to this material; during installation at the machine, you only need to adjust the distance between the head of the sensor and the measuring target. The signal output of the converter determines how you should adjust the sensor.