EPRO PR6423/003-030 CON021 – Non-Contact Eddy Current Proximity Sensor | PR6423 Series
Engineering Background
The EPRO PR6423 series represents the industry benchmark for non-contact eddy current measurement in rotating machinery protection systems. Developed to meet the stringent demands of API 670-compliant turbomachinery monitoring, this sensor family is deployed globally in power generation, petrochemical, and heavy industrial facilities where continuous shaft displacement and vibration data are mission-critical.
Product Positioning
The PR6423/003-030 CON021 is a 3 mm diameter, 30 mm cable-extension eddy current proximity probe paired with the CON021 signal conditioning interface. It is engineered for procurement engineers who require a drop-in replacement or new-installation sensor with full compatibility to EPRO/Emerson CSI 6500 and legacy Bently Nevada 3300 series monitor racks. Konmask.com supplies this unit from verified industrial surplus and authorized distribution channels, with full traceability documentation available on request.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | PR6423/003-030 CON021 |
| Manufacturer | EPRO (Emerson Automation Solutions) |
| Sensor Type | Eddy Current / Non-Contact Proximity Probe |
| Probe Diameter | 3 mm (Ø3) |
| Cable Length | 030 = 3.0 m (extension cable) |
| Conditioner | CON021 (integrated signal conditioner) |
| Measurement Range | 0 – 2 mm (nominal linear range) |
| Sensitivity | 8 mV/µm (nominal) |
| Supply Voltage | –24 VDC (±10%) |
| Output Signal | –2 VDC to –18 VDC (proportional to gap) |
| Frequency Response | DC to 10 kHz (–3 dB) |
| Operating Temperature | –40 °C to +120 °C (probe tip) |
| Target Material | Steel / ferrous and non-ferrous metals |
| Protection Class | IP67 (probe body) |
| Compliance | API 670, CE, ATEX (zone classification per conditioner) |
| Weight | 268 g (probe + cable assembly) |
| Connector | MIL-C-5015 / standard EPRO coaxial |
Proven Application Environments
- Steam & Gas Turbines – Shaft radial vibration and axial position monitoring per API 670
- Centrifugal Compressors – Real-time rotor displacement in high-speed rotating equipment
- Pumps & Motors – Bearing journal orbit analysis and eccentricity measurement
- Gearboxes – Gear mesh frequency detection and shaft runout measurement
- Power Generation – Generator rotor position feedback in combined-cycle plants
- Petrochemical & Refinery – Continuous online monitoring in hazardous area installations
Engineering Advantages
- Non-Contact Measurement – Zero mechanical wear; no influence on rotor dynamics
- Wide Frequency Bandwidth – DC to 10 kHz captures both static position and high-frequency vibration events
- High Sensitivity & Linearity – 8 mV/µm output with <1% non-linearity over calibrated range
- Robust Construction – IP67-rated probe body withstands oil mist, coolant, and high-humidity environments
- API 670 Compliant – Direct replacement in existing machinery protection system racks
- Integrated CON021 Conditioner – Eliminates separate driver module; simplifies installation and reduces BOM complexity
- Cross-Compatible – Signal output compatible with Emerson CSI 6500, Bently Nevada 3300/3500 series monitor inputs
System Architecture & Signal Flow
The PR6423/003-030 CON021 operates as a complete eddy current measurement chain:
- Probe Tip (Ø3 mm) → Generates high-frequency oscillating electromagnetic field directed at target shaft surface
- Extension Cable (3.0 m) → Transmits RF signal from probe to conditioner with controlled impedance; maintains calibration integrity
- CON021 Signal Conditioner → Demodulates RF carrier; outputs DC-proportional voltage (–2 V to –18 V) representing gap distance
- Monitor Rack Input → Voltage signal feeds directly into API 670 monitor card (e.g., Emerson CSI 6500 or Bently Nevada 3500/40M) for alarm/trip processing
Note: The probe, extension cable, and conditioner are factory-matched and calibrated as a system. Do not interchange components from different serial batches without recalibration.
Sourcing & Quality Verification
- Source Traceability – Units sourced from OEM-authorized distributors and verified industrial MRO channels; documentation available on request
- Incoming Inspection – Each unit undergoes visual inspection, connector integrity check, and output voltage verification prior to dispatch
- Calibration Status – Factory calibration certificate available; recalibration service referral available for critical installations
- Packaging – Anti-static foam-lined carton with desiccant; probe tip protected by machined cap
- Warranty – 12-month warranty against manufacturing defects from date of shipment
Procurement Process
- Confirm Part Number – Verify PR6423/003-030 CON021 matches your existing system’s probe diameter, cable length, and conditioner type
- Request Quote – Contact support@konmask.com or call +0086 19859288691 for volume pricing and lead time
- Submit PO – Purchase order accepted via email; proforma invoice issued within 1 business day
- Payment & Dispatch – Payment confirmation triggers same-day or next-day dispatch; DHL / FedEx / SF Express available
- Documentation Package – Packing list, commercial invoice, and test report shipped with unit; ATEX/CE certificates available digitally
Technical FAQ
Q: Is the PR6423/003-030 CON021 a direct replacement for Bently Nevada 330101 series probes?
A: Functionally compatible in most API 670 monitor racks. Output voltage range and sensitivity are equivalent. Verify connector pinout and conditioner power supply polarity before installation.
Q: Can this probe measure non-ferrous targets (aluminum, titanium)?
A: Yes. Eddy current sensors work on all electrically conductive materials. Sensitivity and linear range will differ from the standard steel calibration curve — request a material-specific calibration if required.
Q: What is the maximum shaft speed this sensor can monitor?
A: The 10 kHz frequency response supports shaft speeds up to approximately 600,000 RPM for 1× vibration detection. Practical limits are determined by the monitor rack’s input bandwidth.
Q: Is recalibration required after installation?
A: Factory calibration is valid for the matched probe/cable/conditioner set. Field gap setting (typically 1.0 mm nominal) must be verified during commissioning using a calibrated gap tool or oscilloscope.
Q: Do you offer expedited shipping for shutdown/turnaround situations?
A: Yes. Contact us directly at support@konmask.com or +0086 19859288691 to arrange priority dispatch and customs pre-clearance documentation.
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Contact: support@konmask.com | +0086 19859288691
