Bently Nevada 21000-00-00-00-064-01-02 – Proximity Probe Housing Assembly | 3300 Series Platform
Engineering Background: In rotating machinery protection, the mechanical interface between the proximity transducer and the machine casing is as critical as the sensor itself. Misalignment, vibration-induced loosening, or inadequate sealing at the probe mounting point introduces measurement error that no amount of signal conditioning can correct. The Bently Nevada 21000-00-00-00-064-01-02 Proximity Probe Housing Assembly is the OEM-engineered mechanical solution that eliminates these failure modes — providing a precision-machined, field-proven mounting structure for 3300 Series proximity probes in the most demanding rotating machinery environments.
Product Positioning: This housing assembly is specified by machinery protection engineers and OEM packagers who require a certified, drop-in mechanical interface for Bently Nevada 3300 Series proximity transducers. It is the correct replacement and spare part for installations where probe positioning accuracy, environmental sealing, and long-term mechanical stability are non-negotiable requirements under API 670 and ISO 10816 compliance frameworks.
Complete Technical Specifications
| Part Number | 21000-00-00-00-064-01-02 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Series | 3300 Proximity Transducer System |
| Component Type | Proximity Probe Housing / Mounting Assembly |
| Compatible Probes | Bently Nevada 3300 XL 8mm, 11mm, 14mm proximity transducers |
| Thread Specification | Per OEM datasheet (metric / UNF — confirm with system drawing) |
| Material | Stainless steel / alloy steel (corrosion-resistant, OEM-grade) |
| Sealing | IP65-rated environmental sealing (dust and jet-water resistant) |
| Operating Temperature | -40°C to +120°C |
| Mounting Configuration | Radial / axial — application-dependent (refer to system drawing) |
| Gap Setting Range | Per 3300 XL system calibration specification (typically 1.0–2.5 mm) |
| Weight | 1,100 g (approx.) |
| Country of Origin | United States |
| HS Code | 8543.70 (Electronic instruments and apparatus) |
Proven Application Environments
The 21000-00-00-00-064-01-02 housing assembly is deployed across the full spectrum of rotating machinery protection applications:
- Gas & Steam Turbines — Radial shaft vibration and axial thrust position monitoring at power generation and combined-cycle plants
- Centrifugal Compressors — Rotor dynamic monitoring in upstream oil & gas, LNG liquefaction, and petrochemical processing
- Integrally Geared Compressors — High-speed pinion shaft monitoring requiring precise probe gap control
- Pumps & Blowers — Bearing condition monitoring in water treatment, power plant auxiliaries, and HVAC systems
- Expanders & Turboexpanders — Cryogenic and high-differential-pressure applications in LNG and air separation
- Marine Propulsion — Shaft monitoring on vessels where vibration data feeds into condition-based maintenance programs
- Nuclear Power — Safety-critical turbine protection loops requiring OEM-certified mechanical components
Engineering Advantages
- OEM Dimensional Accuracy — Precision-machined to Bently Nevada tolerances, ensuring correct probe gap setting without field modification or shimming
- Vibration-Resistant Locking — Integrated locking mechanism prevents probe migration under continuous vibration, maintaining calibrated gap over the full maintenance interval
- Environmental Sealing — IP65-rated construction protects the probe-to-housing interface from oil mist, process gas condensate, and wash-down fluids common in turbine halls
- Material Compatibility — Stainless steel construction resists corrosion in hydrogen-rich, sour gas, and high-humidity environments
- API 670 System Integrity — Using OEM housing ensures the complete proximity measurement chain (probe + cable + driver + monitor) remains within the certified system boundary
- Zero Recalibration on Replacement — Identical form, fit, and function to factory-installed housing; probe gap re-verification only, no system recalibration required
- Reduced MTTR — Stocking this assembly as a critical spare eliminates multi-week OEM procurement delays during forced outages
System Architecture & Signal Flow
The 21000-00-00-00-064-01-02 housing assembly occupies the mechanical interface layer of the Bently Nevada 3300 Series proximity measurement chain. Understanding the full signal flow is essential for correct specification:
- Machine Casing / Bearing Housing — Tapped and machined mounting boss (customer-supplied)
- Probe Housing Assembly (this item) — 21000-00-00-00-064-01-02 — provides the threaded bore, locking collar, and environmental seal for the proximity probe
- Proximity Transducer — e.g., 330780-50-00 (8mm) or 330930-080-00-00 (11mm) — threaded into the housing and gap-set to the shaft
- Extension Cable — e.g., 130539-50 (50 ft) — routes the eddy-current signal from the probe to the junction box or rack room
- Proximitor® Driver — e.g., 3300 XL 8mm Proximitor (330180-91-00) — conditions the signal and outputs a calibrated voltage proportional to gap distance
- Monitor Module — 3500/40M, 3500/42M, or 3500/45 — processes the signal, applies alarm and trip setpoints, and outputs to DCS/SCADA
Contact Konmask for complete system BOM verification and cross-reference support.
Sourcing & Quality Verification
Konmask.com sources the Bently Nevada 21000-00-00-00-064-01-02 exclusively through verified industrial distribution channels. Every unit undergoes the following before dispatch:
- Visual and dimensional inspection against OEM datasheet and reference samples
- Thread gauge verification — ensures correct probe engagement and torque specification
- Authenticity check — part marking, label, and serial number verification against Bently Nevada / Baker Hughes records
- Anti-static, moisture-barrier packaging with humidity indicator card
- Certificate of Conformance (CoC) available upon request
- Full traceability documentation provided for nuclear and safety-critical applications
We do not supply refurbished, repaired, or counterfeit components. All stock is traceable to authorized distribution.
Procurement Process
- Submit an RFQ — Email support@konmask.com with required quantity, delivery timeline, and destination port
- Receive a Quote — We respond within 24 business hours with pricing, lead time, and availability confirmation
- Place Your Order — Purchase via secure online checkout or proforma invoice for B2B accounts
- Inspection & Documentation — Parts are inspected, CoC issued, and packed with full traceability documentation
- Delivery — DHL / FedEx Express worldwide; EXW, CIF, and DAP Incoterms available; HS code documentation provided for customs clearance
Technical FAQ
Q: Which proximity probes are compatible with the 21000-00-00-00-064-01-02 housing?
A: This housing is designed for Bently Nevada 3300 Series proximity transducers. Confirm the probe diameter (8mm, 11mm, or 14mm) and thread specification against your system drawing before ordering. Konmask’s technical team can assist with cross-referencing.
Q: Can this housing be used with third-party proximity probes?
A: The housing is dimensioned to Bently Nevada OEM specifications. Using third-party probes may compromise gap accuracy and API 670 system compliance. We recommend OEM probes for all safety-critical applications.
Q: What is the correct probe gap for the 3300 XL system?
A: The standard gap range for 3300 XL 8mm probes is 1.0–2.5 mm (typically set to 1.5 mm for mid-range output). Refer to the Bently Nevada 3300 XL Installation Manual (document 141536-01) for your specific probe and driver combination.
Q: Do you provide documentation for customs clearance?
A: Yes. We provide commercial invoice, packing list, CoC, and HS code documentation (HS: 8543.70) for all international shipments.
Q: What is the lead time for the 21000-00-00-00-064-01-02?
A: In-stock units ship within 3–5 business days. Out-of-stock lead time is typically 4–8 weeks from authorized distribution. Contact us for current availability.
Q: Is this part interchangeable with other Bently Nevada housing part numbers?
A: Housing assemblies vary by probe size, thread specification, and mounting configuration. Do not substitute without verifying the full part number against your system drawing. Konmask can provide cross-reference support.
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