Description
EPRO PR6423/003-010-CN + CON021 Eddy Current Sensor System – Non‑contact shaft vibration and position monitoring
The PR6423 paired with the CON021 is a workhorse setup for API 670‑style condition monitoring. It’s built for continuous, non-contact measurement of shaft vibration and rotor position on turbines, compressors, pumps, and large motors. One thing I appreciate is how this combo stays stable in high temperature areas around bearing housings, yet still gives a clean dynamic vibration signal plus a DC gap output for slow-roll and thermal growth checks. The “-010” marking typically indicates a 10 m system length (probe + extension) and the “/003” thread variant suits common machine case adapters, which in many cases makes retrofits straightforward.
Order Placement Process and Guarantees
- Warranty: 365 days
- Delivery: 1 week if in stock; no more than one month at the latest
- Payment: 50% advance; full payment prior to delivery
- Express shipping: FedEx, UPS, DHL
Key Features
- Matched probe + driver – PR6423 probe and CON021 converter are calibrated to work as a system, which typically shortens commissioning time.
- Dual outputs – Dynamic AC signal for vibration analysis and a DC gap voltage for shaft position/thermal growth trending.
- 10 m system length – The “-010” variant is commonly used where the monitor rack is further from the machine train.
- Robust in harsh areas – Stainless probe construction and industry-proven CON021 driver for long-term stability near bearings and seals.
- API 670 style scaling – Sensitivities align with common proximitor ranges, making it easy to integrate with standard racks and PLC cards expecting analog signals.
- Flexible mounting – The “/003” thread configuration suits typical brackets and machine-case adaptors used on turbines and compressors.
- Broad metal target compatibility – Works on conductive shaft materials (e.g., steel) without contact or added target hardware.
Technical Specifications
| Brand / Model | EPRO PR6423/003-010-CN + CON021 |
| HS Code | 903180 (Measuring or checking instruments, other) |
| Measurement Principle | Non-contact eddy current proximity measurement |
| Target Material | Conductive metals (typically steel shafts) |
| System Length | 10 m total (indicated by “-010”; probe + extension cable) |
| Power Requirements (CON021) | 24 V DC nominal (typical), low power consumption |
| Signal Input/Output Types | Input: PR6423 probe; Outputs: dynamic AC vibration voltage and DC gap voltage |
| Sensitivity / Scale | Factory-set; common calibrations around 4 mV/μm or 7.87 mV/μm (varies by tip size and range) |
| Operating Temperature | Probe: up to approx. 180°C typical; CON021 electronics: approx. 0…+70°C |
| Communication Interfaces | Analog outputs; no digital bus. Terminal screw connections on CON021. |
| Installation Method | Threaded probe mount in machine case; CON021 DIN-rail or panel mounting (variant-dependent) |
| Dimensions & Weight | Defined by variant; “-010” denotes total cable length of 10 m (system). Weight varies with cable length. |
Application Fields
From my experience, this set is used wherever you need reliable non-contact readings on rotating equipment:
- Steam and gas turbines: radial vibration and shaft relative position at bearings
- Compressors and expanders: dynamic vibration and slow-roll runout checks
- Pumps and fans: imbalance/misalignment detection and thermal growth tracking
- Gearboxes: relative shaft vibration for early fault detection
- Power generation, oil & gas, petrochemical, pulp & paper, steel plants
A maintenance lead at a combined-cycle plant mentioned the PR6423 + CON021 held calibration through a hot restart and only needed a quick re-gapping after a seal steam leak—no probe replacement required. That kind of resilience is what people typically look for in base‑loaded units.
Advantages & Value
- Reliable signal chain – Stable scaling over distance and temperature helps avoid nuisance alarms.
- Compatibility – Works with EPRO monitoring systems and most API 670 racks expecting analog prox inputs.
- Lower lifecycle cost – Rugged probe design and proven CON021 electronics mean fewer unplanned swaps.
- Simplified commissioning – Predefined system length and sensitivity reduce on-skid adjustments.
- Supportable in the field – Standard cabling and hardware make spares planning more predictable.
Installation & Maintenance
- Environment – Mount the probe through a rigid bracket or case adapter; keep cable runs away from VFD power cables when possible. Provide ventilation for the CON021 in the cabinet.
- Gap setting – Set the probe mid-range to the specified gap (many setups land near ~1.0 mm, depending on calibration). Verify DC gap voltage within target.
- Wiring – Maintain shield continuity, single-point grounding, and minimum bend radius on the extension cable. Tighten terminals on the CON021 and strain-relief the cable.
- Safety – De-energize the cabinet before termination work. Confirm the machine is at a safe condition for any probe insertion/removal.
- Routine care – Periodically clean the probe tip, re-check gap after outages, and verify sensitivity with a calibrated micrometer rig. Firmware updates are not applicable to the probe/CON021, but keep your monitoring rack firmware current.
Quality & Certifications
- CE compliance (EMC) and RoHS
- Manufactured under ISO 9001 quality system
- Warranty: 365 days from delivery
You might notice that different sub-variants of PR6423 and CON021 have unique calibrations and thread forms. If you share your existing system length and monitor scaling, I can check compatibility and suggest the closest drop-in configuration to minimize rework.
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