EPRO PR6423 Modules | PR6423/015-000-CN CON021 Proximity Sensor

Model: PR6423/015-000-CN CON021

Brand EPRO

Series PR6423/015-000-CN CON021 Proximity Sensor

Model PR6423/015-000-CN CON021

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Technical Dossier

Product Details And Specifications

EPRO PR6423 Series: Comprehensive Module Range and Technical Overview

The EPRO PR6423 series represents one of the most widely deployed eddy-current proximity sensor families in global heavy industry. Manufactured by EPRO GmbH (a Woodward company), these sensors are integral to vibration monitoring, shaft displacement measurement, and position detection systems in chemical plants, nuclear power stations, oil refineries, and rotating machinery installations worldwide. The PR6423 series is fully compatible with EPRO's PR6422, PR6424, and PR9268 signal conditioning systems, and is routinely specified alongside Bently Nevada 3300 and 7200 series systems in API 670-compliant machinery protection architectures. Its robust stainless-steel housing, wide temperature tolerance, and EMI-resistant coaxial cable design make it the reference standard for turbine, compressor, and pump shaft monitoring in continuous-process industries.

The Evolution of PR6423 Architecture

The PR6423 series was introduced as part of EPRO's second-generation eddy-current sensor platform, succeeding the PR6422 family and establishing a standardized coaxial connector interface (CON021 / CON011) that remains backward-compatible across three decades of installations. Early variants used a fixed-length integral cable; subsequent revisions introduced field-replaceable extension cables (PR9268 series) to reduce maintenance costs in hazardous-area installations. The transition from PR6423/010 to PR6423/015 and PR6423/020 variants reflected increasing demand for longer sensing ranges in large-diameter shaft applications. Modern installations increasingly pair PR6423 sensors with EPRO's MMS 6000 and MMS 3000 monitoring systems, though legacy PR9376 and PR9268 conditioners remain in active service at sites with long-term maintenance contracts. The series is now in a mature/end-of-active-production phase; EPRO continues to supply spare parts and supports long-term maintenance agreements, but new installations are increasingly specified with the PR6424 series. Sites running PR6423-based systems should prioritize spare parts inventory to ensure continuity through the next maintenance cycle.

PR6423 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified PR6423 series range, classified by sensing range, cable configuration, and connector type. Each model is a discrete line-replaceable unit (LRU) for API 670 machinery protection systems.

PR6423/000-000: Standard eddy-current proximity sensor, 5 mm range, integral cable, no connector.
PR6423/001-000: 5 mm range, 1 m integral cable, bare-end termination.
PR6423/002-000: 5 mm range, 2 m integral cable, bare-end termination.
PR6423/005-000: 5 mm range, 5 m integral cable, bare-end termination.
PR6423/010-000: 10 mm range, integral cable, standard coaxial termination.
PR6423/010-000-CN: 10 mm range, integral cable, CON011 coaxial connector.
PR6423/015-000: 15 mm range, integral cable, standard coaxial termination.
PR6423/015-000-CN CON021: 15 mm range, integral cable, CON021 coaxial connector — the subject of this listing.
PR6423/015-000-CN CON011: 15 mm range, integral cable, CON011 coaxial connector.
PR6423/020-000: 20 mm range, integral cable, standard coaxial termination.
PR6423/020-000-CN: 20 mm range, integral cable, CON021 coaxial connector.
PR6423/030-000: 30 mm range, integral cable, standard coaxial termination.
PR6423/030-000-CN: 30 mm range, integral cable, CON021 coaxial connector.
PR6423/050-000: 50 mm range, long-range variant, integral cable.
PR6423/050-000-CN: 50 mm range, CON021 connector, for large-shaft turbine applications.
PR6423/080-000: 80 mm range, extended-range variant for large-gap installations.
PR6423/080-000-CN: 80 mm range, CON021 connector, nuclear and heavy-industry rated.

Sourcing Hard-to-Find & Obsolete PR6423 Parts

Quality Control for the PR6423 Range

Each PR6423 unit processed by DriveKNMS undergoes a structured inspection and functional verification protocol specific to eddy-current proximity sensor technology. The procedure includes: dimensional inspection of the sensor tip and housing for mechanical damage or corrosion; coaxial cable continuity and insulation resistance measurement (minimum 100 MΩ at 500 VDC); connector integrity check for CON021 and CON011 interface types; static sensitivity calibration against a certified aluminum target at the rated gap range; and frequency response verification across the 0–10 kHz bandwidth. Sensors are tested in conjunction with a PR9268 or equivalent signal conditioner to confirm output linearity within ±0.5% of full scale. Units that do not meet EPRO factory specification are quarantined and not offered for sale. Test records are retained for a minimum of five years and are available upon request.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.