EPRO PR6422/012-010 – Eddy-Current Proximity Probe for Shaft Vibration and Position Monitoring

The EPRO PR6422/012-010 is part of the well-proven PR6422 proximity probe family used on turbines, compressors, and large rotating equipment for non-contact shaft vibration and axial position measurement. It’s typically paired with EPRO/B&K Vibro eddy-current drivers (such as CON011 / CON021 / CON041) to deliver both the DC gap signal and the dynamic AC vibration signal for API 670-style condition monitoring systems.
You might notice the code format “PR6422/012-010”; in many cases, the “/012” defines a specific mechanical variant and the “-010” indicates a cable/extension length option—worth double-checking against your nameplate or existing installation.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days from shipment
• Delivery: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment, balance due prior to delivery
• Express options: FedEx, UPS, DHL

Key Features

• Non-contact eddy-current sensing – Measures shaft displacement and vibration without touching the surface, minimizing wear and drift.
• Compatible with CON011 / CON021 / CON041 – The matched driver provides DC gap and AC dynamic outputs for monitoring and protection systems.
• Stable readings in harsh environments – From my experience, the PR6422 family holds calibration well in industrial temperature ranges and near high electromagnetics.
• API 670-style integration – Typically used in API 670 compliant chains, making it easier to retrofit into existing panels and racks.
• Robust cabling and shielding – Designed to reduce noise pickup on long runs, which is often the pain point on large machines.
• Variants for high temperature and hazardous areas – Ex-certified versions are available in the PR6422 family; check your exact suffix code to match the site zone classification.

Technical Specifications

Related or Supporting Products

• EPRO CON011 – Classic eddy-current driver; provides DC gap and AC dynamic outputs. Good choice for general-purpose turbomachinery.
• EPRO CON021 – Driver with extended configuration options; typically used where specific range/linearity setups are needed.
• EPRO CON041 – Compact driver variant; often selected where panel space is tight.
• Matched Extension Cables – Order lengths to match your “-010” or other suffix; probe, cable, and driver are calibrated as a set for linearity and sensitivity.
• EPRO PR6423 – Similar probe family with different tip/measurement range options; typically chosen for larger gaps or different threads.

One thing I appreciate is how interchangeable the PR6422 seems to be with existing brackets on older skids. A maintenance engineer at a gas plant told us they swapped in PR6422/012-010 to replace legacy probes, kept their existing drivers, and immediately got steadier gap voltage with less noise—no major rework on the bracket.

Installation & Maintenance

• Mounting – Use a rigid, vibration-free bracket. Thread the probe and lock with the supplied nut. Set the initial gap using a feeler gauge per your machine’s spec (commonly around the mid-linear range of the probe/driver).
• Cabinet & Wiring – Install the driver in a ventilated cabinet (IP-rated as needed), separate signal and power wiring, and connect a single-point ground to minimize loops. Shielded cable routing away from VFD outputs helps reduce EMI.
• Calibration – Keep the probe, cable, and driver as a matched set. If any component is replaced, re-verify linearity and gap scale at the monitor. In most cases, a simple two-point check suffices on overhaul.
• Routine Checks – Inspect probe tip cleanliness and mounting tightness at each shutdown. Clean metallic debris from the tip and ensure the shaft surface finish hasn’t deteriorated.
• System Upkeep – If connected to an online monitoring system, apply any recommended firmware updates to the monitoring rack/software and keep channel notes aligned with the probe set serials.
• Safety – For hazardous locations, confirm your exact PR6422 variant code for Ex certification and install with approved barriers per site standards.

Quality & Certifications

• CE compliance for EMC and safety (family-level)
• RoHS-conform materials, typically used across the PR6422 family
• ATEX/IECEx variants available within the PR6422 range (check exact suffix)
• Manufacturer quality system commonly aligned with ISO 9001
• Standard manufacturer’s warranty applies; our sales warranty period is 365 days

From my experience, the lowest-risk path is to match the PR6422/012-010 probe with its originally specified extension cable length and a CON011 or CON021 driver calibrated as a set. If you share your existing driver code and cable length, we’ll cross-check the exact calibration so you don’t have to touch the monitor scaling.