EMERSON PR6423/004-030 CON021/913-030 – Non-Contact Eddy Current Proximity Sensor | Bently Nevada 3300 Series Platform
Engineering Background
The PR6423/004-030 is a high-precision eddy current proximity transducer manufactured by EMERSON under the Bently Nevada product line. Designed for continuous, non-contact measurement of shaft displacement, vibration, and position in rotating machinery, this sensor is a cornerstone component in turbomachinery protection and condition monitoring systems worldwide.
Product Positioning
Paired with the CON021/913-030 signal conditioning module, this sensor system delivers calibrated, loop-powered 4–20 mA or voltage output signals directly compatible with Bently Nevada 3300 Series monitors and DCS/PLC input cards. It is the preferred choice for procurement engineers specifying critical machinery protection instrumentation in power generation, oil & gas, petrochemical, and heavy industrial environments.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | EMERSON / Bently Nevada |
| Sensor Part Number | PR6423/004-030 |
| Conditioner Part Number | CON021/913-030 |
| Measurement Principle | Eddy Current (Non-Contact) |
| Sensing Range | 0 – 4 mm (nominal linear range) |
| Cable Length | 3.0 m (030 suffix) |
| Output Signal | -24 VDC (standard Bently Nevada convention) |
| Supply Voltage | -24 VDC (via conditioner) |
| Frequency Response | DC to ≥10 kHz |
| Operating Temperature | -35°C to +120°C (sensor tip) |
| Target Material | Conductive metals (steel, Inconel, titanium) |
| Ingress Protection | IP67 (sensor body) |
| Connector Type | Bently Nevada standard coaxial |
| Weight | ~200 g (sensor + cable assembly) |
| Compatible Monitor | Bently Nevada 3300 Series, 3500 Series |
| Approvals | CE, ATEX (consult datasheet for zone classification) |
Proven Application Environments
- Steam & Gas Turbines: Shaft radial vibration and axial position monitoring per API 670
- Centrifugal Compressors: Rotor dynamic displacement measurement in high-speed rotating equipment
- Pumps & Motors: Bearing journal orbit analysis and imbalance detection
- Gearboxes: Gear mesh frequency monitoring and structural health assessment
- Power Generation: Generator rotor eccentricity and critical speed tracking
- Petrochemical & Refinery: Continuous online monitoring in SIL-rated safety loops
Engineering Advantages
- Non-Contact Measurement: Zero mechanical wear; suitable for continuous 24/7 operation without maintenance intervals
- High Bandwidth: DC to >10 kHz frequency response captures both slow shaft movement and high-frequency vibration events
- Plug-and-Play Compatibility: Direct drop-in replacement for existing Bently Nevada 3300/3500 system installations
- Robust Construction: Stainless steel housing with hermetic sealing withstands aggressive process fluids, steam, and high-pressure environments
- Calibrated System: Sensor and conditioner are factory-matched and calibrated as a system pair for guaranteed scale factor accuracy
- Long Cable Option: 3-meter integral cable minimizes field splicing and signal degradation in large machinery installations
System Architecture & Signal Flow
The PR6423/004-030 sensor probe is mounted in a drilled and tapped boss adjacent to the shaft journal. The integral coaxial cable routes to the CON021/913-030 signal conditioner, which is typically DIN-rail mounted in the local junction box or control room marshalling cabinet. The conditioner provides the oscillator drive signal to the probe, demodulates the returned RF signal, and outputs a calibrated DC voltage proportional to the gap distance. This output feeds directly into the Bently Nevada 3300 monitor rack input card, which performs alarm/trip logic and communicates shaft position data to the plant DCS via 4–20 mA or Modbus.
Sourcing & Quality Verification
- Source: Konmask.com maintains direct procurement relationships with authorized EMERSON/Bently Nevada distributors and verified surplus equipment dealers
- Inspection: All units undergo visual inspection, connector integrity check, and coaxial cable continuity verification prior to dispatch
- Documentation: Original manufacturer labels, part number verification, and available test certificates provided upon request
- Traceability: Batch records and supplier declarations of conformity available for quality-critical procurement
- Packaging: Anti-static foam packaging with moisture barrier; sensor tip protected by factory cap during transit
Procurement Process
- Step 1 – Inquiry: Contact support@konmask.com or call +0086 19859288691 with your required quantity and delivery timeline
- Step 2 – Quotation: Receive formal quotation with unit price, lead time, and shipping options within 1 business day
- Step 3 – Order Confirmation: Submit PO or place order directly via Konmask.com checkout
- Step 4 – Dispatch: Orders ship within 2–5 business days; express DHL/FedEx available for urgent requirements
- Step 5 – After-Sales: 12-month warranty on verified genuine units; technical support available post-installation
Technical FAQ
Q: Is the PR6423/004-030 a direct replacement for the PR6423/004-031 (longer cable)?
A: No. The cable length suffix (030 = 3 m, 031 = 5 m, etc.) is part of the calibrated system. Always match the cable length to the original specification or recalibrate the conditioner accordingly.
Q: Can this sensor be used without the CON021/913-030 conditioner?
A: No. The PR6423 series requires a matched Bently Nevada signal conditioner to provide the oscillator excitation and perform demodulation. The sensor alone produces no usable output signal.
Q: What is the target material sensitivity?
A: The sensor is factory-calibrated for AISI 4140 steel. Use on Inconel, titanium, or other alloys requires a material correction factor — consult the Bently Nevada calibration chart or contact our technical team.
Q: Is this unit ATEX/IECEx certified for hazardous area use?
A: The PR6423 series has ATEX approval options. Please confirm the specific zone classification required and we will verify the certification status of available stock.
Q: What is the minimum order quantity?
A: Single units are available. Volume pricing applies for orders of 3 units or more.
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Contact: support@konmask.com | +0086 19859288691
