EPRO PR6425/010-100 CON021 – 16mm Eddy Current Proximity Sensor | Bently Nevada 3300 Series Compatible Platform
Engineering Background
The EPRO PR6425 series represents the industrial standard for non-contact shaft displacement and vibration measurement in rotating machinery protection systems. Engineered to operate within the Bently Nevada 3300 / EPRO MMS 6000 signal conditioning ecosystem, the PR6425/010-100 CON021 variant is optimized for 16mm probe tip geometry, delivering high-linearity output across a calibrated measurement range. It is the preferred choice for turbine, compressor, pump, and motor shaft monitoring in power generation, petrochemical, and heavy industrial environments.
Product Positioning
Konmask.com supplies the PR6425/010-100 CON021 as a verified OEM-grade component for maintenance replacement, system commissioning, and spare-parts inventory. Each unit is sourced through controlled supply channels and undergoes pre-shipment functional verification. This sensor is a direct fit for existing Bently Nevada 3300 XL and EPRO MMS 6000 rack installations without recalibration of the signal conditioner.
Complete Technical Specifications
| Part Number | PR6425/010-100 CON021 |
| Manufacturer | EPRO (Baker Hughes / Bently Nevada ecosystem) |
| Probe Tip Diameter | 16 mm |
| Sensor Type | Eddy Current (Non-contact) Proximity Sensor |
| Cable Length | 1.0 m (integral cable, extension via CON021 driver) |
| Driver / Extension | CON021 (integrated driver module) |
| Measurement Range | 0 – 2.5 mm (nominal linear range) |
| Sensitivity | 8 V/mm (nominal, per EPRO calibration standard) |
| Output Signal | DC voltage, negative-going (–24 VDC supply) |
| Supply Voltage | –24 VDC (±10%) |
| Operating Temperature | –40°C to +120°C (probe); –40°C to +85°C (driver) |
| Target Material | AISI 4140 steel (standard calibration); compatible with most ferromagnetic and non-ferromagnetic metals |
| Ingress Protection | IP67 (probe body) |
| Connector Type | MIL-C-5015 / EPRO standard coaxial |
| Weight | 650 g (probe + driver assembly) |
| Compliance | CE, ATEX Zone 1 (consult datasheet for Ex classification) |
| Compatible Systems | Bently Nevada 3300 XL, EPRO MMS 6000, MMS 3120 |
| SKU | PR6425/010-100 CON021 |
Proven Application Environments
- Steam & Gas Turbines – Shaft radial vibration and axial position monitoring per API 670
- Centrifugal Compressors – Continuous rotor displacement measurement in high-speed rotating equipment
- Boiler Feed Pumps & Cooling Water Pumps – Bearing journal orbit and eccentricity tracking
- Electric Motors (>1 MW) – Air-gap monitoring and shaft runout detection
- Gearboxes – Gear mesh frequency and shaft position feedback
- Petrochemical & Refinery Trains – Continuous operation in H₂S, hydrocarbon, and high-humidity atmospheres
- Power Generation (Nuclear / Thermal) – Safety-critical shaft protection loops
Engineering Advantages
- Non-contact measurement – Zero mechanical wear; suitable for continuous 24/7 operation without maintenance intervals
- High linearity – <±1% full-scale error across calibrated range on standard AISI 4140 target
- Wide temperature immunity – Stable output from cryogenic to high-temperature process environments
- EMI/RFI robustness – Coaxial cable construction and driver shielding suppress electrical noise in VFD-rich environments
- Direct system compatibility – Plug-and-play replacement for existing Bently Nevada 3300 XL rack slots; no recalibration required when replacing like-for-like
- ATEX-rated – Suitable for Zone 1 hazardous area installation (verify Ex certificate for specific installation)
- Compact 16mm form factor – Fits standard API 670 proximity probe mounting bosses without machining modification
System Architecture & Signal Flow
The PR6425/010-100 CON021 operates as the sensing element within a three-component eddy current measurement chain:
- PR6425 Probe (16mm tip) → generates high-frequency electromagnetic field; detects target displacement via impedance change
- CON021 Driver / Oscillator-Demodulator → converts probe impedance variation to a calibrated DC voltage output (–24 VDC powered)
- Signal Conditioner / Monitor Card (e.g., Bently Nevada 3300 XL 01-01-00-00 or EPRO MMS 6120) → receives DC voltage, applies alarm/trip setpoints, outputs 4–20 mA or relay contacts to DCS/PLC
The integrated CON021 driver eliminates the need for a separate extension cable in short-reach installations (≤1 m probe-to-driver distance), simplifying installation in confined machinery spaces.
Sourcing & Quality Verification
- Origin: OEM-grade components sourced through verified industrial distribution channels
- Pre-shipment check: Each unit inspected for physical integrity, connector condition, and cable continuity before dispatch
- Packaging: Anti-static, moisture-barrier packaging with original manufacturer labeling preserved
- Traceability: Batch and serial documentation available upon request for critical installation projects
- Warranty: 12-month operational warranty against manufacturing defects (contact support for terms)
Procurement Process
- Confirm part number – Verify PR6425/010-100 CON021 matches your existing system BOM or Bently Nevada rack card specification
- Request quote – Contact [email protected] or call +0086 19859288691 for volume pricing, lead time, and availability confirmation
- Place order – Secure checkout via Konmask.com; bank transfer (T/T) and major payment methods accepted
- Shipping – DHL / FedEx express worldwide; export documentation (commercial invoice, packing list, CO) provided
- After-sales support – Technical assistance for installation, commissioning, and compatibility queries available post-delivery
Technical FAQ
Q: Is the PR6425/010-100 CON021 a direct replacement for the Bently Nevada 330101-00-06-10-02-00?
A: The PR6425 series is EPRO’s equivalent to the Bently Nevada 3300 XL proximity probe family. Electrical output characteristics (sensitivity, supply voltage, output range) are compatible. Verify mounting thread and cable length before installation.
Q: Can this sensor be used with non-steel targets (e.g., titanium, aluminum)?
A: Yes, but sensitivity and linear range will differ from the standard AISI 4140 calibration. A target-specific calibration curve is required. Contact our technical team for guidance.
Q: What is the maximum shaft speed this sensor can monitor?
A: The eddy current principle is frequency-independent for DC displacement measurement. The limiting factor is the signal conditioner bandwidth (typically 10 kHz for Bently Nevada 3300 XL cards), supporting shaft speeds well above 100,000 RPM for vibration frequency components within that bandwidth.
Q: Is ATEX certification included with each unit?
A: ATEX classification applies to the PR6425 product family. Individual unit certificates are available upon request. Specify your installation zone and gas group when ordering for hazardous area projects.
Q: What is the lead time for stock orders?
A: In-stock units ship within 1–3 business days. For large-volume or project orders, contact us for confirmed lead time.
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Contact: [email protected] | +0086 19859288691
