Vibration & Displacement Monitoring Solution – EMERSON PR6426/000-030 CON021 | Bently Nevada 3300 Series
The EMERSON PR6426/000-030 CON021 is a high-precision eddy current proximity sensor engineered for continuous shaft vibration, axial position, and differential expansion measurement in critical rotating machinery. Paired with the CON021 signal conditioning module, this sensor delivers reliable, real-time displacement data to your protection and monitoring system.
Where This Product Is Used
This sensor is specified by reliability engineers and OEM integrators across the following industries and applications:
- Steam & Gas Turbines – Shaft radial vibration and axial thrust position monitoring per API 670
- Centrifugal Compressors – Rotor dynamic displacement measurement in petrochemical and LNG plants
- Pumps & Fans – Bearing proximity sensing in power generation and water treatment facilities
- Gearboxes – Gear mesh frequency and shaft orbit analysis in heavy industry
- Marine Propulsion Systems – Shaft alignment and vibration monitoring on vessels and offshore platforms
- Nuclear & Thermal Power Plants – Safety-critical machinery protection systems
Technical Specifications
- Part Number: PR6426/000-030 CON021
- Manufacturer: EMERSON (Bently Nevada)
- Series: Bently Nevada 3300 / PR6426
- Sensor Type: Eddy Current Proximity Sensor
- Probe Cable Length: 1.0 m (standard; custom lengths available)
- Measurement Range: 0–2 mm (linear range)
- Sensitivity: 7.87 V/mm (200 mV/mil) nominal
- Operating Temperature: –50°C to +177°C (probe); –35°C to +85°C (driver)
- Supply Voltage: –24 VDC (nominal)
- Output Signal: –2 VDC to –18 VDC (DC proportional to gap)
- Target Material: AISI 4140 steel or equivalent (non-ferrous correction required)
- Connector: CON021 integral driver/conditioner
- Approvals: CE, ATEX (consult datasheet for zone classification)
- Weight: ~500 g (probe + driver assembly)
Why Engineers Specify This Model
- API 670 Compliant – Meets the industry standard for machinery protection systems, ensuring acceptance by EPC contractors and end-users worldwide
- Integrated CON021 Driver – Eliminates separate extension cable matching; simplifies installation and reduces wiring errors
- Wide Temperature Range – Suitable for hot-section turbine environments where competing sensors fail
- Long-Term Signal Stability – Thermally compensated design maintains calibration accuracy over years of continuous operation
- Direct Replacement – Drop-in compatible with existing Bently Nevada 3300 series installations; no recalibration required
- Proven Field Record – Deployed in thousands of critical machinery trains globally across oil & gas, power, and petrochemical sectors
Complete System Bill of Materials
For a fully functional eddy current monitoring loop, the following components are typically required:
- Proximity Probe: PR6426/000-030 (this item)
- Signal Conditioner / Driver: CON021 (integrated in this SKU)
- Monitor Module: Bently Nevada 3300/16 or 3500/40M (sold separately)
- Rack / Power Supply: Bently Nevada 3500 Rack with PWR supply (sold separately)
- Mounting Hardware: Proximity probe bracket and lock nut (application-specific)
- Interconnect Cable: Shielded twisted-pair, 24 AWG minimum (field-supplied)
Compliance & Industry Standards
- API 670 – Machinery Protection Systems
- API 670 Annex D – Eddy Current Sensor Performance Verification
- IEC 61511 – Functional Safety (SIL-capable installations)
- ATEX Directive 2014/34/EU (zone classification per model variant)
- CE Marking – EMC Directive 2014/30/EU
- ISO 10816 / ISO 20816 – Mechanical vibration measurement on non-rotating parts
Quality Assurance & Sourcing
All EMERSON / Bently Nevada components supplied by Konmask.com are sourced through verified industrial distribution channels. Each unit undergoes incoming inspection including:
- Visual and dimensional verification against OEM datasheet
- Sensitivity and linearity bench test (gap vs. output voltage)
- Packaging integrity check with anti-static protection
- Serial number and date code traceability documentation
We do not supply counterfeit, refurbished-as-new, or grey-market parts. Certificate of conformance available upon request.
How to Source This Part
Ready to order or need a formal quotation?
- In-Stock Orders: Add to cart and check out directly — most orders ship within 1–3 business days from our Hong Kong warehouse
- Bulk / Project Quantities: Contact us for volume pricing and lead-time confirmation
- Urgent Requirements: Email support@konmask.com with your project timeline for expedited handling
- OEM / EPC Procurement: We support approved vendor list (AVL) qualification and can provide full traceability documentation
Application-Specific FAQ
Q: Is the PR6426/000-030 CON021 a direct replacement for the Bently Nevada 330100 series?
A: The PR6426 series uses the same 7.87 V/mm sensitivity standard and is electrically compatible with 3300/3500 monitors. Physical mounting dimensions differ — verify probe tip diameter and thread before installation.
Q: Can this sensor be used on non-ferrous targets (aluminum, titanium)?
A: Yes, but a target material correction factor must be applied during calibration. Contact Konmask for application-specific guidance.
Q: What is the maximum shaft speed this sensor can monitor?
A: The PR6426 has a flat frequency response to 10 kHz, making it suitable for machinery operating up to 600,000 RPM in proximity mode.
Q: Does Konmask provide installation and commissioning support?
A: We provide technical documentation and remote commissioning guidance. On-site support can be arranged through our partner network.
Q: What is the warranty on this product?
A: 12-month warranty against manufacturing defects from date of shipment, consistent with OEM terms.
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