EMERSON PR6423/008-110 with CON021 – Eddy-current probe set for reliable shaft vibration and position monitoring

The EMERSON PR6423/008-110 paired with the CON021 extension cable is a proven, non-contact eddy-current probe set used on turbines, compressors, and critical pumps. From my experience, this combination is chosen when teams need stable, API 670-style proximity measurement without a full system retrofit. The 8 mm probe geometry suits medium bearing housings, while the CON021 cable maintains signal integrity back to the driver (proximitor) module. You might notice that it integrates smoothly into existing Emerson/epro machinery protection architectures where dependability matters more than flashy features.

Company’s Order Placement Process and Guarantees

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

Key Features

• Non-contact eddy-current measurement – Measures shaft vibration, radial displacement, and axial position without touching the rotating surface.
• 8 mm probe form factor – The PR6423/008-110 geometry typically fits medium-bearing housings and tight machine envelopes.
• Matched cable (CON021) – Coaxial extension designed to preserve high-frequency signal quality between probe and driver.
• Stable linear response – When paired with a compatible driver, the system provides a linear range suitable for API 670-style monitoring in most cases.
• Industrial build – Stainless-steel probe body and rugged cable construction stand up to oil, vibration, and temperature cycling.
• Drop-in with Emerson/epro ecosystems – Typically integrates with Emerson eddy-current drivers and machinery protection racks used across power and oil & gas sites.

Technical Specifications

Application Fields

This probe set is used widely in rotating equipment protection and diagnostics. Typical sites include:

• Steam and gas turbines – radial vibration, shaft eccentricity, and thrust (axial) position
• Compressors (centrifugal and axial) – casing-mounted proximity for rotor condition
• Large pumps and fans – vibration and thermal growth tracking on bearing housings
• Generators and expanders – proximity monitoring to support trip logic and trending
• Refining and petrochemical units – API 670-style machinery protection systems

Advantages & Value

• Reliability you can trend on – Stable output over time, which matters for shutdown setpoints and predictive analytics.
• Compatibility – Plays nicely with Emerson/epro drivers and protection racks in many cases, limiting retrofit complexity.
• Lower lifecycle cost – Rugged cable and probe reduce nuisance faults and repeated callouts.
• Technical support – Application help for gap setting, cable routing, and driver pairing so commissioning stays on schedule.

A maintenance manager at a combined-cycle plant told us the PR6423 set “just behaved” after a hot restart where other probes drifted—small anecdote, but it mirrors what we typically see in the field.

Installation & Maintenance

• Mounting – Install the probe through a rigid bracket or bearing housing; tighten locknut to recommended torque; set initial gap using a feeler gauge per the driver’s linear range.
• Wiring – Route the CON021 coax away from high-current cables; maintain minimum bend radius; avoid hard clamping near the probe head.
• Cabinet & environment – Place the driver/proximitor in a ventilated cabinet; keep ambient within the driver’s specs; ensure clean grounding and shielding continuity.
• Safety – Isolate the machine, follow LOTO, and verify all clearances before any mechanical adjustments around rotating parts.
• Routine care – Inspect gap and mounting tightness during outages; clean probe tip if oil varnish builds up; verify driver calibration and update monitoring firmware where applicable.

Quality & Certifications

• CE compliant; RoHS alignment for materials
• Manufactured under ISO 9001 quality systems
• Warranty support: 365 days

Related/Supporting Components (typical)

• Emerson eddy-current driver (proximitor) modules for PR642x probes
• Mounting brackets and locknuts for 8 mm proximity probes
• Bulkhead feed-through and armored conduit for harsh environments
• Alternative probe sizes from the same family: PR6422 (small tip), PR6424 (larger tip)

Note: Exact ranges, cable lengths, and thread forms for PR6423/008-110 + CON021 can vary by ordered option. If you share your existing driver model and target linear range, we’ll match the probe/cable configuration to ensure system linearity and correct calibration.