Emerson PR6423/11R-131 PR6423 8 mm Reverse-Mount Eddy Current Sensor
A reverse-mount PR6423 execution with armored cable for constrained turbomachinery sensor installations.
Product Profile
Emerson PR6423/11R-131 is an 8 mm reverse-mount eddy-current sensor. The 11 base selects the 3/8-24 UNF case with armored cable, R specifies reverse mounting and the final group selects no adapter plug, 8 m cable and open cable end.
The PR6423 family measures radial and axial dynamic displacement, position, eccentricity and speed without contacting the shaft. Reverse-mount geometry and the open-ended 8 m lead must be matched to the installed bracket and converter wiring.
Technical Data
System Role
Reverse mounting supports installations where access and adjustment occur from the rear of the probe location.
Armored cable protects the long 8 m sensor lead against mechanical damage.
The open end must be terminated according to the approved converter and cabinet wiring scheme.
The exact target material and converter configuration determine measurement-chain performance.
Compatibility & Service
- Document bracket orientation, thread engagement, target geometry, gap and cable route.
- Mark every open-ended conductor and shield termination before disconnection.
- Avoid bending or twisting the armored section at the sensor exit and maintain cable bend radius.
- Confirm gap, scale factor, dynamic response and protection-channel logic after installation.
Applications
- Radial or axial displacement measurement on turbines, compressors, gearboxes, pumps and fans.
- Reverse-access probe installations with 3/8-24 UNF mounting hardware.
- Eccentricity and speed measurement using the correct PR6423 converter chain.
- Replacement of an armored reverse-mount PR6423 with an 8 m open-ended cable.
FAQ
Q01What does the R identify in PR6423/11R-131?+
It identifies the reverse-mount mechanical execution, which changes how the sensor is installed and adjusted.
Q02Can a standard-mount PR6423/110-131 replace PR6423/11R-131?+
Not without redesigning the bracket and verifying probe reach, access and target clearance; reverse and standard mounting are mechanically different.
Q03Why is an open cable end important on this execution?+
The field termination, shield treatment and converter connection must be recreated from the controlled wiring record rather than assumed from a LEMO-ended sensor.
Q04What information prevents an 8 m cable mismatch?+
Provide the complete suffix, measured route, converter location, terminal drawing and any junction or protection hardware between sensor and converter.
Q05What should be tested before returning the channel to protection service?+
Verify mechanical clearance, static gap, polarity, sensitivity, dynamic signal, alarm setpoints and any trip or voting logic affected by the channel.
