Turbine & Rotating Machinery Vibration Monitoring Solution – Bently Nevada 21504-00-40-10-02 | 3300 XL Series
Where This Product Is Used
The Bently Nevada 21504-00-40-10-02 proximity probe is a precision eddy-current displacement sensor engineered for continuous, non-contact vibration and position measurement on rotating machinery. It is deployed in the most demanding industrial environments, including:
- Steam & Gas Turbines – Shaft radial vibration and axial position monitoring per API 670
- Centrifugal & Axial Compressors – Real-time rotor orbit and differential expansion measurement
- Pumps & Fans – Bearing journal vibration surveillance in petrochemical and power plants
- Gearboxes – Gear mesh frequency and shaft displacement tracking
- Hydro Turbines – Slow-speed shaft runout and eccentricity monitoring
- Marine Propulsion Systems – Continuous shaft monitoring in offshore and naval applications
Wherever rotating equipment reliability is mission-critical, the 21504-00-40-10-02 delivers the sub-micron resolution engineers depend on to prevent catastrophic failure.
Technical Specifications
| Part Number | 21504-00-40-10-02 |
| Brand | Bently Nevada (Baker Hughes) |
| Series | 3300 XL 8mm Proximity Transducer System |
| Sensor Type | Eddy-Current Proximity Probe |
| Probe Diameter | 8 mm |
| Cable Length | 1.0 m (integral cable) |
| Extension Cable | Requires 330130 series extension cable |
| Driver / Oscillator | Compatible with 3300 XL drivers (330180 series) |
| Linear Range | 0.25 mm – 2.25 mm (10 mil – 90 mil) |
| Scale Factor | 7.87 V/mm (200 mV/mil) |
| Frequency Response | DC – 10,000 Hz |
| Operating Temperature | -35°C to +177°C (-31°F to +350°F) |
| Target Material | AISI 4140 steel (standard); other alloys with calibration |
| Connector | Armor-jacketed integral cable with TNC connector |
| Approvals | FM, CSA, ATEX, IECEx (intrinsically safe) |
| Weight | 220 g (probe + integral cable) |
Why Engineers Specify This Model
- API 670 Compliant – Meets the industry standard for machinery protection systems, accepted by EPC contractors and end-users globally
- Plug-and-Play with 3300 XL System – Direct replacement within the Bently Nevada 3300 XL ecosystem; no recalibration of the monitor required when replacing like-for-like
- Intrinsic Safety Certifications – FM, CSA, ATEX, and IECEx approvals allow installation in Zone 0/1 hazardous areas without additional barriers in many configurations
- Proven MTBF – Bently Nevada proximity probes are the global benchmark for reliability in turbomachinery protection, with decades of field history in LNG, refinery, and power generation assets
- Wide Temperature Range – Operates reliably from cryogenic cold to high-temperature bearing housings up to 177°C
- Non-Contact Measurement – Zero mechanical wear; no maintenance interval for the sensing element itself
Complete System Bill of Materials
The 3300 XL proximity transducer system requires three matched components. A typical channel BOM:
- Probe: 21504-00-40-10-02 (this item) – 8 mm probe, 1.0 m integral cable
- Extension Cable: 330130-080-00-00 – 8.0 m extension (total system cable = 9.0 m)
- Driver / Oscillator: 330180-X1-05 – 3300 XL 8 mm driver, DIN rail mount
- Monitor (optional): 3500/42M – Proximitor / Seismic Monitor for rack-based protection
Note: Probe, extension cable, and driver must be ordered as a matched set calibrated to the same total cable length for accurate scale factor.
Compliance & Industry Standards
- API 670 – Machinery Protection Systems (5th Edition)
- API 670 Annex D – Proximity Probe Installation Guidelines
- IEC 61511 – Functional Safety for Process Industry (SIL-capable configurations)
- ATEX Directive 2014/34/EU – Equipment for explosive atmospheres
- IECEx Scheme – International certification for Ex equipment
- FM 3610 / CSA C22.2 No. 157 – Intrinsically safe apparatus
- ISO 10816 / ISO 20816 – Mechanical vibration evaluation of machines
Quality Assurance & Sourcing
Konmask.com specializes in industrial automation and condition monitoring components sourced from authorized distributors and verified surplus channels. Every unit of the 21504-00-40-10-02 offered through our platform undergoes:
- Visual and dimensional inspection against OEM drawings
- Verification of date codes, lot traceability, and connector integrity
- Anti-static packaging with humidity indicator cards for long-term storage protection
- Documentation package available upon request (CoC, test records)
We do not sell counterfeit or refurbished-as-new parts. All listings are clearly described with condition and sourcing information.
How to Source This Part
Ready to order or need a formal quotation for your procurement team? Contact us through any of the following channels:
- Email: [email protected]
- Phone / WhatsApp: +0086 19859288691
- Website: https://Konmask.com
For large-quantity orders, MRO blanket agreements, or emergency shutdown (ESD) requirements, please contact us directly for lead time and pricing. We support NET payment terms for qualified industrial buyers.
Application-Specific FAQ
Q: Can the 21504-00-40-10-02 replace an older 21504 series probe directly?
A: Yes. The 3300 XL 8 mm probe family maintains backward compatibility with 3300 series drivers and monitors when total cable length is matched. Verify the extension cable length to maintain the calibrated scale factor.
Q: What target material is this probe calibrated for?
A: Standard calibration is for AISI 4140 steel. For Inconel, titanium, or other alloys, a material-specific calibration factor must be applied at the driver. Contact Bently Nevada or your system integrator for correction curves.
Q: Is this probe suitable for axial position (thrust) measurement?
A: Yes. The 21504-00-40-10-02 is used for both radial vibration and axial position measurement. For thrust applications, ensure the driver channel is configured for DC position output and that the linear range covers the expected axial float.
Q: What is the maximum shaft speed this probe can monitor?
A: The probe’s frequency response extends to 10,000 Hz, making it suitable for high-speed machinery up to and beyond 100,000 RPM when used with appropriate signal conditioning.
Q: Do you provide calibration certificates?
A: Calibration documentation from the OEM or third-party NIST-traceable labs is available upon request for select inventory. Please inquire at the time of order.
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Contact: [email protected] | +0086 19859288691
