EPRO PR6423/000-030-CN CON021 — Eddy Current Displacement & Vibration Sensor | EPRO Proximity Probe Series
Engineering Background
The EPRO PR6423 series is a field-proven eddy current proximity probe system engineered for continuous, non-contact measurement of shaft displacement, vibration, and position in rotating machinery. Developed to meet the stringent demands of turbomachinery OEMs and plant reliability engineers, the PR6423/000-030-CN paired with the CON021 signal conditioner forms a complete, API 670-compatible measurement chain trusted in power generation, petrochemical, and heavy industrial installations worldwide.
Product Positioning
This listing covers the complete sensor-conditioner assembly: the PR6423/000-030-CN eddy current probe (30 mm cable, metric thread) and the CON021 signal conditioner. Sourced from verified OEM and authorized distribution channels, this unit is suited for direct drop-in replacement or new installation in EPRO / Emerson CSI machinery protection systems. Konmask.com stocks and ships this assembly to industrial buyers globally.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (Probe) | PR6423/000-030-CN |
| Signal Conditioner | CON021 |
| Measurement Principle | Eddy current (non-contact) |
| Measurement Range | 0 – 2 mm (standard linear range) |
| Sensitivity | 8 mV/µm (nominal) |
| Output Signal | –24 VDC bias; –4 to –20 V linear range |
| Frequency Response | DC to 10 kHz (–3 dB) |
| Probe Cable Length | 30 mm (integral, per -030 designation) |
| Thread (Probe Body) | M8 × 1 (metric) |
| Target Material | Steel / stainless steel (AISI 4140 reference) |
| Operating Temperature (Probe) | –35 °C to +120 °C |
| Operating Temperature (Conditioner) | –35 °C to +85 °C |
| Supply Voltage | –24 VDC (±10%) |
| Supply Current | ≤ 25 mA |
| Ingress Protection (Probe) | IP67 |
| Connector (Probe) | Integral coaxial, EPRO standard |
| Weight (Assembly) | ~220 g |
| Compliance | API 670, CE, ATEX (consult datasheet for zone rating) |
| Country of Origin | Germany / EU (OEM) |
Proven Application Environments
- Steam & Gas Turbines — shaft radial vibration and axial position monitoring per API 670
- Centrifugal Compressors — rotor dynamic displacement in high-speed, high-pressure service
- Pumps & Fans — bearing journal orbit analysis and imbalance detection
- Gearboxes — gear mesh frequency monitoring and shaft runout measurement
- Hydro Turbines — slow-speed shaft position and thrust measurement
- Motor-Generator Sets — air-gap monitoring and rotor eccentricity detection
Engineering Advantages
- Non-contact measurement — zero mechanical wear; suitable for continuous 24/7 operation
- 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
- API 670 compliant — direct integration with machinery protection systems (MPS) and DCS/PLC safety loops
- Robust IP67 probe — sealed against oil mist, coolant splash, and industrial washdown environments
- Drop-in replacement — identical form, fit, and function to OEM-installed units; no recalibration of conditioner required when replacing probe only
- Integral cable design — eliminates field-assembled connector joints; reduces signal noise and failure points
System Architecture & Signal Flow
The PR6423/000-030-CN operates as the sensing element of a two-component eddy current system:
- Probe (PR6423/000-030-CN) — generates a high-frequency electromagnetic field via internal oscillator coil. When a conductive target (shaft) enters the field, eddy currents are induced, altering coil impedance proportional to gap distance.
- Extension Cable — transmits the modulated RF signal from probe to conditioner. Total system cable length must match conditioner calibration (consult EPRO system documentation for matched-length requirements).
- Signal Conditioner (CON021) — demodulates the RF signal, applies temperature compensation, and outputs a calibrated DC voltage (–4 to –20 V) proportional to gap. Powers the probe at –24 VDC.
- Monitoring System Input — conditioner output connects directly to EPRO rack monitors, Bently Nevada 3500 series (with adapter), or any 4–20 mA / voltage-input PLC/DCS card.
Note: System sensitivity and linearity are calibrated as a matched probe + conditioner set. Do not interchange conditioners between probe assemblies without recalibration.
Sourcing & Quality Verification
- Source: OEM-authorized distribution and verified surplus channels; each unit inspected prior to shipment
- Condition: New-in-box (NIB) or factory-refurbished — specified at time of order confirmation
- Documentation: Original EPRO datasheet, calibration certificate (where available), and Konmask inspection report provided with shipment
- Traceability: Serial number and date code recorded; available on request for plant maintenance records
- Warranty: 12-month Konmask operational warranty against manufacturing defects
Procurement Process
- Inquiry — Submit RFQ via product page or email support@konmask.com with quantity, required condition (NIB/refurb), and delivery timeline
- Quotation — Konmask responds within 1 business day with price, lead time, and stock confirmation
- Order Confirmation — Purchase order accepted; payment via T/T, credit card, or approved net terms
- Inspection & Packaging — Unit tested, photographed, and packed in anti-static, shock-protected packaging
- Shipment — DHL / FedEx express worldwide; tracking provided within 24 hours of dispatch
- After-Sales — Technical support available for installation, commissioning, and warranty claims
Technical FAQ
Q: Can the PR6423/000-030-CN be used with a Bently Nevada 3500 monitor?
A: Yes, with an appropriate signal conditioner adapter or by using the CON021 output (–4 to –20 V) as a direct voltage input to the 3500 I/O module. Consult your system integrator for channel configuration.
Q: What is the maximum shaft speed this sensor can monitor?
A: The 10 kHz bandwidth supports shaft speeds up to approximately 600,000 RPM for 1× vibration detection, well beyond the range of any practical rotating machine.
Q: Is recalibration required after replacing only the probe?
A: If the replacement probe is from the same EPRO part number and the conditioner is unchanged, recalibration is typically not required. However, a gap voltage verification at installation is always recommended per API 670 commissioning procedures.
Q: What target materials are compatible?
A: The system is calibrated for AISI 4140 steel. Other ferromagnetic or conductive materials (stainless steel, titanium, aluminum) will shift the sensitivity curve — consult EPRO application notes for correction factors.
Q: Do you offer expedited shipping for urgent plant shutdowns?
A: Yes. Contact us directly at +0086 19859288691 for same-day or next-flight-out arrangements.
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Contact: support@konmask.com | +0086 19859288691
