EMERSON PR6423/008-130 CON021 Eddy Current Sensor | Replacement, Equivalent & Selection Guide
The EMERSON PR6423/008-130 CON021 is a high-precision eddy current (proximity) sensor designed for non-contact displacement and vibration measurement in critical rotating machinery. This page provides full technical specifications, compatible replacement models, application guidance, and sourcing information to help engineers and procurement teams make confident selection decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | EMERSON (Bently Nevada) |
| Part Number | PR6423/008-130 CON021 |
| Sensor Type | Eddy Current / Proximity Sensor |
| Cable Length | 8 m (extension cable) |
| Connector Type | CON021 |
| Measuring Range | 0–2 mm (typical, target-dependent) |
| Output Signal | –24 VDC (nominal), linear analog |
| Supply Voltage | –24 VDC |
| Sensitivity | 7.87 V/mm (200 mV/mil) |
| Frequency Response | DC to 10 kHz |
| Operating Temperature | –35°C to +120°C |
| Protection Rating | IP67 |
| Weight | ~300 g |
| Compliance | API 670 compatible |
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or equivalents for the PR6423/008-130 CON021. Always verify electrical and mechanical compatibility before substitution:
- EMERSON PR6423/010-130 CON021 — Same series, 10 m cable variant; electrically identical, verify cable routing clearance.
- EMERSON PR6423/005-130 CON021 — 5 m cable variant; suitable where shorter cable runs are acceptable.
- Bently Nevada 330130-080-00-00 — 3300 XL 8 mm proximity transducer system; functionally equivalent for API 670 applications, different connector standard.
- Bently Nevada 330105-02-12-10-02-00 — 3300 5 mm proximity transducer; verify gap range and sensitivity match.
- EPRO PR6423/008-130 — EPRO-branded equivalent (same Emerson group); direct drop-in for most installations.
- Metrix ST5484E — Third-party equivalent eddy current sensor; confirm output scaling and connector compatibility.
Note: Replacement suitability depends on target material, gap setting, and system conditioner compatibility. Contact Konmask for application-specific verification.
Why Choose the Original Model
- API 670 Compliance — Factory-certified for use in turbomachinery protection systems per API 670 standard.
- Matched System Performance — Designed to work as a calibrated pair with EMERSON/Bently Nevada signal conditioners (e.g., 3300 series, TK3 series) for guaranteed linearity.
- Proven Field Reliability — Widely deployed in gas turbines, steam turbines, compressors, and pumps across oil & gas, power generation, and petrochemical industries.
- Traceability & Documentation — Original parts come with full calibration certificates and factory test reports, critical for regulated plant environments.
- Long-Term Support — Emerson provides ongoing firmware, calibration, and spare parts support for the PR6423 series.
Typical Applications
- Shaft radial vibration monitoring on gas and steam turbines
- Axial position (thrust) measurement on compressors
- Differential expansion monitoring on large rotating equipment
- Eccentricity and rotor runout measurement
- Speed and phase reference (keyphasor) sensing
- Bearing housing displacement in API 670 protection systems
System Compatibility
The PR6423/008-130 CON021 is designed for use within the EMERSON Bently Nevada 3300 Series and System 1 monitoring platforms. Confirmed compatible conditioners and monitors include:
- Bently Nevada 3300 XL Proximitor® Sensor System
- Bently Nevada 3500 Series Machinery Protection System
- EPRO MMS 6000 / MMS 6350 Series
- TK3 Transducer Conditioner (with appropriate scaling)
When integrating with third-party DCS or PLC systems (Siemens, ABB, Honeywell, Rockwell), ensure the –24 VDC analog output is within the input range of the receiving module.
Selection Guide
Use the following criteria to confirm the PR6423/008-130 CON021 is the correct choice, or to identify the right variant:
- Cable Length: The “008” designates an 8 m cable. Available variants: 005 (5 m), 008 (8 m), 010 (10 m), 015 (15 m). Select based on sensor-to-conditioner distance.
- Tip Diameter: PR6423 uses an 8 mm probe tip. For tighter installations, consider the PR6424 (5 mm) series.
- Target Material: Optimized for AISI 4140 steel. Correction factors apply for stainless steel, titanium, or aluminum shafts.
- Gap Range: Standard linear range 0.25–2.25 mm. Confirm shaft runout and installation gap are within this window.
- Connector: CON021 is the standard industrial connector. Confirm mating connector on your junction box or conditioner.
- Hazardous Area: For ATEX/IECEx Zone 1 installations, verify the appropriate Ex-rated variant is specified.
Quality Assurance & Sourcing
- All units sourced by Konmask are inspected for physical integrity, connector condition, and cable continuity prior to dispatch.
- Original factory packaging and documentation preserved where available.
- Calibration certificates and test reports provided upon request.
- Traceability records maintained for regulated plant and EPC contractor requirements.
- Both new OEM stock and professionally refurbished units available — clearly labeled and priced accordingly.
How to Order
- Online: Add to cart directly from this page. Bulk/project pricing available — contact us before checkout.
- Email: Send your BOM or part number list to support@konmask.com
- Phone/WhatsApp: +0086 19859288691 (Mon–Fri, 09:00–18:00 CST)
- Lead Time: In-stock items ship within 1–3 business days. Ex-stock and sourced items: 5–15 business days depending on origin.
- Shipping: DHL, FedEx, UPS international express available. Sea freight for large orders.
Replacement & Compatibility FAQ
Q: Can I use a PR6423/010-130 CON021 in place of the PR6423/008-130 CON021?
A: Yes, in most cases. The only difference is cable length (10 m vs 8 m). Ensure the extra 2 m of cable can be routed safely without signal degradation.
Q: Is the PR6423/008-130 CON021 compatible with the Bently Nevada 3500 system?
A: Yes, when used with the appropriate 3500/42 Proximitor I/O module and correct gap/scale factor settings.
Q: What is the difference between PR6423 and PR6424?
A: PR6423 has an 8 mm probe tip (larger linear range); PR6424 has a 5 mm tip (smaller, for tight installations). Both are eddy current sensors in the same EMERSON/EPRO family.
Q: Can this sensor be used on stainless steel shafts?
A: Yes, but a target material correction factor must be applied during calibration. Contact Konmask for application support.
Q: Do you provide calibration certificates?
A: Yes. Calibration documentation is available upon request for all units. Please specify your requirement at the time of order.
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