Product Core Brief
- Model: PR6423/000-131
- Brand: EMERSON / EPRO (EPRO GmbH, acquired by Emerson in 2009)
- Series: PR6423 Non-Contact Eddy Current Sensor
- Core Function: Non-contact measurement of shaft vibration, axial/radial displacement, eccentricity, and position for critical rotating machinery.
- Product Type: Eddy Current Displacement / Vibration Probe
- Key Specs: 8mm probe | ±1.0 mm static range | 8 V/mm sensitivity | -35 to +180°C operating temp | M10×1 or 3/8″-24UNF thread | API 670 compliant
- Condition: New Original (New Surplus) / Factory Sealed
Product Introduction (Rotation Engine)
The EMERSON EPRO PR6423/000-131 is an 8mm non-contact eddy current sensor from the PR6423 series, designed for critical turbomachinery protection applications including steam turbines, gas turbines, compressors, blowers, and fans. It measures shaft vibration, axial and radial displacement, eccentricity, and position without physical contact, eliminating mechanical wear and ensuring long-term measurement stability.
The PR6423 series is factory-calibrated against 42CrMo4 steel (equivalent to AISI/SAE 4140) and paired with EPRO CON-series converters (CON011, CON021, CON031, CON041) to form a complete measurement loop. The system complies with API 670, DIN 45670, and ISO 10817-1 standards and is suitable for explosive atmospheres when used with appropriate intrinsic safety barriers.
The suffix /000-131 defines the specific configuration including cable length, connector type, and armor option. Because PR6423 suffix codes vary across installations, the exact cable length and connector type for this unit should be confirmed against the label before ordering. For procurement and maintenance teams, factory-sealed surplus stock reduces risk from prior field damage, cable insulation degradation, or unknown installation history.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | EMERSON / EPRO (EPRO GmbH) |
| Product Family | PR6423 Non-Contact Eddy Current Sensor |
| Model | PR6423/000-131 |
| Probe Diameter | 8 mm |
| Measurement Range (Static) | ±1.0 mm (±0.04 in) |
| Measurement Range (Dynamic) | 0 to 500 µm (0 to 20 mil); best suited for 50–500 µm |
| Sensitivity | 8 V/mm (203.2 mV/mil) |
| Linearity Error | < ±1% FS after calibration |
| Nominal Gap | 1.5 mm (0.06 in) |
| Operating Temperature | -35 to +180°C (-31 to 356°F); short-term up to +200°C |
| Thread | M10×1 or 3/8″-24-UNF-2A |
| Sensor Material | Stainless steel |
| Compatible Converters | CON011, CON021, CON031, CON041 series |
| Standards | API 670, DIN 45670, ISO 10817-1 |
| Hazardous Area | Eex ib IIC T6/T4 with appropriate barrier |
Note: The exact cable length, connector type, and armor configuration for PR6423/000-131 must be verified from the nameplate, as suffix codes define these options.
Key Selling Points & Differentiators
- Genuine EPRO 8mm eddy current probe for API 670 machinery protection systems.
- Non-contact measurement eliminates wear and preserves shaft surface integrity.
- Factory-calibrated against 42CrMo4 steel; no field recalibration required for standard applications.
- Compatible with CON011 (IP67), CON021 (IP20), CON031, and CON041 converters.
- Suitable for steam turbines, gas turbines, compressors, fans, and gearboxes.
- Factory-sealed surplus stock reduces risk from prior field installation or cable degradation.
- Not recommended as a substitute for PR6424/PR6425/PR6426 probes without verifying range and converter compatibility.
Quality Transparency SOP (DYNAMIC GENERATION)
For surplus EPRO eddy current probes, inspection focuses on physical integrity, cable condition, and correct model identification:
- Visual QA: Inspect probe tip, threaded body, cable jacket, and connector for impact damage, cracking, or corrosion.
- Anti-static handling: Seal in ESD-safe packaging with humidity indicators before shipment.
- Nameplate verification: Confirm model PR6423/000-131 and suffix configuration match the order.
- Cable & connector inspection: Check PTFE cable insulation, LEMO plug or blunt-cut end, and armor integrity for wear or oxidation.
- Fit verification: Where possible, confirm mechanical compatibility with the intended mounting bracket, converter, and target shaft diameter (>25 mm for negligible error).
Technical Risk Avoidance (DYNAMIC GENERATION)
❗ Confirm suffix configuration. The /000-131 suffix defines cable length and connector type. Verify against the label before installation.
❗ Match the correct converter. PR6423 probes must be paired with compatible CON-series converters (CON011/021/031/041). Mixing with converters designed for other probe series causes sensitivity errors and measurement distortion.
❗ Verify target material. Factory calibration is based on 42CrMo4 steel. Using the probe on non-standard materials requires field gap adjustment.
❗ Check minimum shaft diameter. For target surfaces smaller than 25 mm, measurement error may exceed 1%.
❗ Confirm operating temperature. Standard PR6423 supports -35 to +180°C. For higher temperatures, a different probe series may be required.
❗ Validate hazardous area compliance. Intrinsic safety barriers are required for explosive atmospheres. CON…/91 series converters are not suitable for hazardous areas.
Buyer’s FAQ
Is this a genuine EPRO sensor?
Yes. The PR6423/000-131 is an original EPRO eddy current probe. EPRO GmbH was acquired by Emerson in 2009 and is now part of Emerson’s asset optimization portfolio.
What condition is the unit in?
Units are sold as New Original / New Surplus unless otherwise stated. That means unused, factory-sealed inventory rather than field-removed hardware.
Can I use it as a direct replacement?
If your existing installation uses a PR6423/000-131 and the cable length, connector type, and converter match, it should be a like-for-like replacement. Always confirm the nameplate first.
What converter does it need?
PR6423 probes are compatible with CON011, CON021, CON031, and CON041 converters. The choice depends on IP rating, connection type, and hazardous area requirements.
Is this the same as PR6424 or PR6425?
No. PR6423, PR6424, and PR6425 have different measurement ranges and sensitivities. They are not interchangeable without verifying system calibration.
How fast can you ship?
Stock availability determines lead time. For urgent machinery protection maintenance, request expedited shipping at checkout.
Do you offer a warranty?
Yes. Warranty terms are provided at checkout. For surplus sensor hardware, a clear warranty window helps protect against DOA or hidden inventory damage.
