Bently Nevada 21000-33-10-00-070-04-02 – Proximity Probe Housing Assembly | 3300 XL Series
Engineering Background
The Bently Nevada 21000 Series Proximity Probe Housing Assemblies are precision-engineered enclosures designed to protect and position eddy-current proximity probes in demanding industrial rotating machinery environments. As a core mechanical interface component within the Bently Nevada 3300 XL continuous monitoring platform, the 21000-33-10-00-070-04-02 housing assembly ensures consistent probe-to-target gap geometry, mechanical isolation from process vibration, and long-term dimensional stability under thermal cycling and chemical exposure.
Product Positioning
This housing assembly is the preferred field-replacement and OEM-specification component for turbines, compressors, pumps, and gearboxes monitored under API 670 machinery protection standards. It is engineered to mate directly with Bently Nevada 3300 XL proximity transducer systems, maintaining the calibrated gap and signal integrity required for radial vibration, axial position, and differential expansion measurements.
Complete Technical Specifications
| Part Number | 21000-33-10-00-070-04-02 |
| Brand | Bently Nevada (Baker Hughes) |
| Series | 21000 Series / 3300 XL Platform |
| Component Type | Proximity Probe Housing Assembly |
| Compatible Probe Series | Bently Nevada 3300 XL, 7200 Series Proximity Transducers |
| Probe Thread Size | M10 × 1.0 (standard metric, per part suffix -04) |
| Housing Material | 316 Stainless Steel (corrosion-resistant) |
| Cable Entry | Armored extension cable compatible (suffix -02) |
| Gap Range | 0.25 mm – 2.54 mm (application-dependent) |
| Operating Temperature | –40°C to +177°C (–40°F to +350°F) |
| Ingress Protection | IP67 (dust-tight, immersion-resistant) |
| Weight | 220 g (nominal) |
| Country of Origin | United States |
| Compliance | API 670, CE, RoHS |
Proven Application Environments
- Steam & Gas Turbines – Radial shaft vibration and axial thrust position monitoring per API 670
- Centrifugal Compressors – Continuous rotor dynamic surveillance in petrochemical and LNG plants
- Boiler Feed Pumps – High-temperature, high-pressure bearing housing installations
- Gearboxes & Expanders – Differential expansion and eccentricity measurement
- Marine Propulsion Systems – Corrosion-resistant deployment in salt-air environments
- Power Generation – Continuous online monitoring in baseload and peaking plants
Engineering Advantages
- Dimensional Precision: CNC-machined housing maintains probe-to-target gap tolerance to ±0.01 mm, preserving eddy-current linearity across the full measurement range.
- 316 SS Construction: Resists H₂S, chlorides, and hydrocarbon condensates common in refinery and offshore environments.
- Direct OEM Compatibility: Drop-in replacement for existing 3300 XL installations — no re-calibration of the monitoring system required when gap is reset to OEM specification.
- Armored Cable Interface: Suffix -02 designates factory-terminated armored extension cable entry, eliminating field-splice failure points.
- Thermal Stability: Low-expansion alloy insert maintains thread engagement integrity across full operating temperature range.
System Architecture & Signal Flow
The 21000-33-10-00-070-04-02 housing assembly positions the eddy-current probe tip at the calibrated standoff distance from the rotating shaft target area. The probe generates a high-frequency electromagnetic field; shaft proximity modulates the field, producing a DC voltage output proportional to gap distance. This signal is routed via the armored extension cable to the 3300 XL proximitor/driver module, which conditions and transmits the measurement to the Bently Nevada System 1 or 3500 rack for alarming, trending, and protection logic.
Signal Chain: Shaft Target → Probe Tip (in Housing) → Extension Cable → 3300 XL Proximitor → 3500/System 1 Monitor Rack → DCS/SIS
Sourcing & Quality Verification
- All units sourced from authorized distributors or verified surplus channels with full traceability documentation.
- Each assembly undergoes incoming inspection: dimensional check, thread gauge verification, and visual inspection per IPC-A-610 workmanship standards.
- Original Bently Nevada part labels, date codes, and serialization are preserved and documented.
- Certificate of Conformance (CoC) available upon request for critical-service applications.
- Export-controlled items handled in compliance with EAR/ITAR regulations where applicable.
Procurement Process
- Confirm Part Number: Verify 21000-33-10-00-070-04-02 against your existing installation drawing or Bently Nevada system documentation.
- Request Quote: Contact support@konmask.com or call +0086 19859288691 for volume pricing, lead time, and CoC availability.
- Order Placement: Purchase directly via Konmask.com checkout or via PO for B2B accounts.
- Shipping: DHL / FedEx Express worldwide; export documentation provided for international shipments.
- After-Sales Support: Technical assistance available for installation gap-setting and system commissioning.
Technical FAQ
Q: Is this a genuine Bently Nevada OEM part?
A: Yes. All units are original Bently Nevada manufacture. We do not supply aftermarket or counterfeit components. Traceability documentation is available on request.
Q: What is the correct installation gap for this housing assembly?
A: The standard calibrated gap for 3300 XL proximity systems is typically 1.0 mm (–10.0 VDC output at mid-range). Refer to Bently Nevada Installation Manual 141536-01 for application-specific gap settings.
Q: Can this housing be used with non-Bently Nevada probes?
A: Not recommended. The housing thread, tip recess geometry, and cable interface are optimized for Bently Nevada 3300 XL transducers. Use with third-party probes may compromise measurement accuracy and system certification.
Q: What is the lead time?
A: In-stock units ship within 1–3 business days. Contact us for current inventory status.
Q: Do you provide installation support?
A: Yes. Our engineering team provides remote technical support for gap-setting, cable routing, and system integration at no additional charge for verified purchasers.
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Contact: support@konmask.com | +0086 19859288691
