Emerson Eddy Current Displacement Transducer Specifications

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. The PR 6423 is commonly used to measure vibration of

machine shafts, eccentricity, thrust (axial displacement), differential

expansion, valve position, and air gaps.

• Non-contact measurement of static and dynamic shaft displacement

- Axial and radial shaft displacement (position)

- Shaft eccentricity

- Shaft vibration (motion)

• Meets international standards, DIN 45670. ISO 10817-1 and API 670

• Rated for explosive area, Eex ib IIC T6/T4

• Other displacement sensor selections include PR 6422. PR 6423.

PR 6424 and PR 6425

• Select converter, such as CON 011/91. 021/91. 041/91. and cable for

complete transducer system