Bently Nevada 21000-28-05-00-40-03-02 Proximity Probe Housing Assembly
Need the official technical documentation? Download the complete Bently Nevada 21000 datasheet here to review detailed installation wiring diagrams and certifications.
Product Overview
The Bently Nevada 21000-28-05-00-40-03-02 is a rugged, explosion-proof proximity probe housing assembly. It protects your critical proximity sensors in harsh industrial environments. This model features a heavy-duty aluminum body with a 304 stainless steel sleeve to resist mechanical wear. It fully complies with API 670 standards for externally mounted probe housings. The system protects the 3300 XL 8 mm proximity probe while allowing easy external adjustment.
Technical Specifications
This comprehensive technical data table details the physical, electrical, and performance capabilities of the unit.
| Parameter | Value / Specification |
|---|---|
| Brand & Manufacturer | Bently Nevada |
| Model Number | 21000-28-05-00-40-03-02 |
| Integrated Probe Type | 3300 XL 8 mm reverse mount probe |
| Linear Range | 2.0 mm (80 mils) starting at -2.0 Vdc |
| System Resolution | 0.1 micrometer (3.9 microinches) typical |
| System Sensitivity | 7.87 V/mm (200 mV/mil) nominal scale factor |
| Frequency Response | 0 Hz to 10 kHz minimum bandwidth |
| Operating Temperature | -51°C to +177°C (-60°F to +350°F) for probe |
| Body Material | Low-copper aluminum body |
| Sleeve Material | Rigid 304 stainless steel |
| Penetration Length | 4.0 inches (approx. 101.6 mm) |
| Cable Length | 0.5 meters (20 inches) |
| Enclosure Rating | Certified CSA Type 4 weatherproof enclosure |
| Standards Compliance | Fully compliant with API 670 standards |
| Hazardous Area Rating | Class I, Div 1 & 2, Groups C, D (Explosion-proof) |
| Net Weight | 1.1 kg (2.4 lb) typical without fittings |
Configuration Breakdown
Below is the detailed suffix configuration code structure for model 21000-28-05-00-40-03-02.
- 21000 — Model: Proximity Probe Housing Assembly
- 28 — Probe Option: 3300 XL 8 mm probe with hazardous area approvals
- 05 — Probe Cable Length: 0.5 meters (20 inches)
- 00 — Standoff Adapter: No standoff adapter included
- 40 — Probe Penetration: 4.0 inches sleeve length
- 03 — Fitting Option: Reducer, plugs, and three cable seal grommet sizes
- 02 — Mounting Thread Option: 3/4-14 NPT threads
Industrial Applications
Engineers deploy this probe housing assembly across a wide range of heavy machinery industries.
- Steam and gas turbine shaft vibration monitoring systems.
- Centrifugal air compressor casing thermal growth measurements.
- Heavy industrial water pump shaft radial dynamic displacement.
- Gearbox input shaft axial thrust position tracking.
- Hydroelectric generator rotor runout and eccentricity monitoring.
Installation & Maintenance Guide
- Always match sleeve penetration length to machine casing depth.
- Apply thread sealant on NPT ports before final torque.
- Adjust probe gap clearance using an external digital voltmeter.
- Check inner o-rings during every scheduled machine shutdown.
- Maintain minimum bend radii for internal extension cables.
Shipping, Packaging & Warranty
- Product Condition: Brand New & Original in factory sealed packaging.
- Factory Warranty: Complete 12 Months replacement protection warranty.
- Handling Time: Ships out rapidly within 12 to 48 hours from payment.
- Express Couriers: Global delivery via fast DHL, FedEx, and UPS.
- Package Contents: Aluminum housing, dome cover, sleeve, o-rings, 3300 XL probe, thread seal, NPT fittings.
Manager’s Insight
“The Bently Nevada 21000 series is the global gold standard for protecting proximity probes. Plants choose this aluminum body design to prevent environmental contaminants from damaging sensitive sensors. Standardizing on this model reduces critical machine downtime. It ensures robust physical protection and highly reliable signal transmission in extreme petrochemical zones.”
Frequently Asked Questions & Buying Guide
Q1: What are the main benefits of using this specific housing option?
A1: It allows online sensor maintenance without shutting down the machine. The physical shell keeps out water, oil, and dust.
Q2: Can I install this housing in hazardous Class I Division 1 locations?
A2: Yes, this housing holds CSA explosion-proof certifications for Class I, Divisions 1 and 2, Groups C and D.
Q3: How do I select the right probe penetration depth for my machine?
A3: Measure your machine casing thickness and mounting bracket depth. Select a penetration length that positions the probe tip within the linear range of the target shaft.
Q4: Why does my order include different size cable seal grommets?
A4: The fitting option 03 includes multiple grommets to securely seal various outer diameter field wiring cables without pinching.
Q5: Can I replace the internal probe without changing the entire housing?
A5: Yes, the reverse-mount design allows fast probe replacement. You do not need to unscrew the main aluminum housing body.
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