EMERSON PR6423/010-140 + CON021 – Non‑contact Eddy-Current Probe System for Shaft Vibration & Position Monitoring

The EMERSON (epro) PR6423 eddy‑current probe paired with the CON021 driver is a proven combo for non-contact measurement of shaft vibration, axial position, and radial clearance on rotating assets. From my experience, this set is often used on turbines, compressors, and large motors where you want reliable displacement data without touching the shaft. The “010-140” build code typically indicates a 10 m integral cable and an M14 × 1.5 probe thread, which suits many standard machine ports. You might notice that the CON021 provides both a dynamic vibration signal and a DC gap/position output, making it easy to feed into plant condition monitoring systems or DCS.

Order Placement Process & Guarantees

• Warranty: 365 days
• Delivery: In-stock items ship in about 1 week; no more than one month at the latest
• Payment: 50% advance payment; balance due before delivery
• Express options: FedEx, UPS, DHL
• Each unit is inspected before dispatch and packed to handle long-distance transport.

Key Features

• Matched probe + driver: PR6423 works directly with CON021 for stable, linear displacement measurement.
• Dynamic and DC outputs: Buffered AC vibration for waveform/FFT and a DC gap/position output for trending.
• Industrial temperature capability: Probe typically handles high process temperatures, suitable for hot bearing housings.
• Standard machine port thread: The 140 code is commonly M14 × 1.5, which simplifies retrofit work.
• Robust shielding: Good noise immunity in high-EMI environments found near VFDs and generator fields.
• DIN-rail driver: CON021 fits neatly in control cabinets; wiring usually stays straightforward.
• Interoperable: In many cases, integrates cleanly with plant condition monitoring racks and PLC/DCS analog inputs.

Technical Specifications

Application Fields

This pairing is typically deployed on:

• Steam/gas turbines (radial vibration, thrust position)
• Compressors and expanders (shaft displacement and rub detection)
• Large motors, generators, and gearboxes
• Critical pumps and fans in balance-of-plant condition monitoring

A maintenance lead told us they swapped in PR6423 + CON021 on a compressor train and immediately saw cleaner waveforms compared to their previous probe—less noise pickup around VFDs and a more stable DC gap.

Advantages & Value

• Reliability: The combination seems to hold calibration well and resists EMI, which cuts false alarms.
• Compatibility: Analog outputs integrate easily with existing CM systems or PLC/DCS cards—no special protocol bridge.
• Lifecycle savings: Fewer nuisance trips, fewer site visits; spare strategy stays simple (probe + driver).
• Supportability: Widely adopted in the field, so parameterization and troubleshooting are straightforward.

Installation & Maintenance

• Cabinet/cabling: Mount CON021 on a ventilated DIN rail; route probe cables in shielded conduits away from high-power lines.
• Probe fitment: Use the M14 × 1.5 threaded port with the correct stand-off; locknuts to secure position. Maintain the specified gap to the shaft.
• Wiring: Observe polarity on 24 VDC supply; land analog outputs on clean AI channels; earth the shield at a single point.
• Safety: Only install on stopped equipment unless you have safe access procedures; verify insulation and sealing in hot zones.
• Routine care: Periodic gap check and zeroing; clean probe tip during outages; verify mV/µm sensitivity; update documentation if scaling is adjusted.
• Calibration: A quick functional test with feeler gauges or a micrometer rig typically confirms linearity and correct output scaling.

Quality & Certifications

• Manufacturer certifications commonly include CE and RoHS; UL or ATEX/IECEx versions may be available depending on variant.
• Each unit is supplied with a 365‑day warranty from us.