Product Overview
The 21000-28-05-00-052-03-02 is a premier industrial-grade protection solution for proximity sensors. As a core component of the Bently Nevada 21000 Series, this assembly provides an explosion-proof environment for sensitive transducers. It is meticulously engineered to meet the API 670 Standard, ensuring consistent performance in high-stakes machinery monitoring. The combination of an aluminum body and 304 Stainless Steel sleeve delivers superior durability against mechanical stress and environmental factors.
Configuration Breakdown
21000 — Proximity Probe Housing Assembly
└── 28: Probe Option
└── 3300 XL 8 mm probe (Integrated connector / Hazardous area rated)
└── 05: Probe Cable Length
└── 0.5 meter (20 inches) internal lead
└── 00: Standoff Adapter
└── No standoff adapter configured
└── 052: Probe Penetration
└── 5.2 inches effective sleeve depth
└── 03: Fitting Option
└── Includes 3/4-14 NPT plug, reducer, and multi-size cable seals
└── 02: Mounting Thread
└── 3/4-14 NPT standard mounting interface
Technical Data & Performance
- Manufacturer: Bently Nevada
- Housing Material: High-grade Aluminum with 304 SS Sleeve
- Hazardous Certification: Explosion-proof (CSA Class I Div 1 & 2)
- Enclosure Rating: Type 4 / IP66 Equivalent
- Standard Compliance: Fully compliant with API 670 for external housings
- Weight: Approximately 1.1 kg (2.4 lb)
- Diagnostic Capability: Supports online probe gap adjustment via removable dome
Oiltech Controls Limited’s Insight
Our technical team identifies the 21000-28-05-00-052-03-02 as a critical asset for “Live-Maintenance” strategies. Because the 21000 Series is externally mounted, engineers can replace or calibrate probes without a full machinery shutdown. The specific 5.2-inch penetration depth is optimized for medium-to-large bearing housings. We recommend verifying the Total Electrical Length (TEL) of your system when pairing this 0.5m probe with extension cables to maintain calibration accuracy.
Typical Applications
- Steam Turbines: Monitoring axial thrust and radial vibration in power plants.
- Centrifugal Compressors: Protecting probes in high-speed oil and gas applications.
- Critical Gearboxes: Shaft position monitoring in industrial drive trains.
- Harsh Environments: Ideal for Hazardous Zones requiring CSA-certified explosion-proof protection.
Shipping & Warranty
- Condition: 100% New & Original in Factory Packing.
- Warranty: Full 12-Month Quality Guarantee.
- Express Logistics: Global door-to-door delivery via FedEx, UPS, or DHL.
Expert FAQ & Procurement Guide
Q: How do I select the correct penetration length for the 21000-28-05-00-052-03-02?
A: Measure from the outer mounting surface of the machine to the target shaft. The 5.2″ sleeve must allow the probe tip to reach the gap range without mechanical interference.
Q: Can the 21000 series be used in offshore saltwater environments?
A: While the 21000 aluminum body is durable, for high-salinity offshore use, we suggest the 24701 stainless steel series. This aluminum model is best for standard refinery and power plant onshore sites.
Q: Does this model include the proximity probe itself?
A: Yes. The 21000-28-05-00-052-03-02 includes a 3300 XL 8mm reverse-mount probe. It is a complete mechanical and electrical assembly.
Q: What is the benefit of the “00” Standoff Adapter option?
A: Choosing “00” (no standoff) minimizes the profile of the housing. This is preferred when space around the bearing pedestal is limited and the sleeve length matches the casing thickness perfectly.
Q: Is the dome cover replaceable if lost?
A: Yes, the dome cover is a standard threaded part. However, maintaining the O-ring seal is vital to preserve the Type 4 enclosure rating and explosion-proof integrity.
Contact Information Inquiries: info@oiltechcontrols.com, +86 158 8020 0923
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
All rights reserved.
Reviews
There are no reviews yet.