Emerson Bently Nevada PR6423 Eddy Current Sensors PR6423/003-031 CON041

Technical Dossier

Product Details And Specifications

Emerson Bently Nevada PR6423 Series Technical Notes

The Emerson Bently Nevada PR6423 series is a family of eddy current proximity sensors engineered for continuous, non-contact vibration and position measurement in rotating machinery. Deployed across global heavy industry — including petrochemical refineries, nuclear power stations, offshore platforms, and LNG processing facilities — the PR6423 series forms the sensing front-end of the Bently Nevada 3300 XL and ADAPT Series condition monitoring systems. These sensors operate on the eddy current principle: a high-frequency oscillating magnetic field induces eddy currents in a conductive target, and the resulting impedance change is converted to a linear DC voltage output by a paired proximitor/extension cable system. The PR6423 series is rated for continuous operation in environments with high vibration, temperature extremes, and aggressive chemical exposure, making it the reference standard for API 670-compliant machinery protection installations.

PR6423 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed configurations within the PR6423 eddy current sensor family. Each entry reflects a distinct body length, cable length, or system pairing. Functional classification follows Bently Nevada's standard sensor/cable/proximitor architecture.

Eddy Current Sensors — Standard Body Configurations:

• PR6423/001-031: 5 mm tip, 1 m integral cable, standard temperature, metric M14 thread body
• PR6423/002-031: 5 mm tip, 2 m integral cable, standard temperature, metric M14 thread body
• PR6423/003-031: 5 mm tip, 3 m integral cable, standard temperature, M14 thread — most widely deployed configuration for 3300 XL systems
• PR6423/004-031: 5 mm tip, 4 m integral cable, standard temperature, M14 thread body
• PR6423/005-031: 5 mm tip, 5 m integral cable, standard temperature, M14 thread body
• PR6423/007-031: 5 mm tip, 7 m integral cable, extended reach, standard temperature
• PR6423/010-031: 5 mm tip, 10 m integral cable, standard temperature, long-run installations
• PR6423/003-130: 5 mm tip, 3 m cable, high-temperature variant rated to 177°C sensor tip
• PR6423/005-130: 5 mm tip, 5 m cable, high-temperature variant, petrochemical/steam turbine service
• PR6423/003-031-CN0: Chinese domestic certification variant, 3 m cable, standard temperature

Extension Cables (PR6422 Series — paired with PR6423 sensors):

• PR6422/003-110: 3 m extension cable, standard, for use with PR6423 short-body sensors
• PR6422/005-110: 5 m extension cable, standard temperature rating
• PR6422/010-110: 10 m extension cable, standard, long-run machinery installations
• PR6422/015-110: 15 m extension cable, extended reach for large turbine housings

Proximitor Modules (CON Series — system interface electronics):

• CON021: 3300 XL 8 mm proximitor, standard output, DIN rail mount, -24 VDC supply
• CON031: 3300 XL 8 mm proximitor, extended temperature housing variant
• CON041: 3300 XL 8 mm proximitor, standard configuration, 7.87 V/mm scale factor — paired with PR6423/003-031 in this listing
• CON081: 3300 XL 8 mm proximitor, dual-channel output, used in redundant protection loops