Product Overview
The Bently Nevada 21000-28-05-15-050-03-02 is a precision-engineered Proximity Probe Housing Assembly designed for reliable vibration monitoring in critical rotating machinery. This model combines a rugged aluminum body with a 304 stainless steel sleeve, ensuring durability in demanding industrial environments. With its CSA Type 4 enclosure rating and compliance with API 670, the 21000-28-05-15-050-03-02 offers exceptional performance for externally mounted proximity probes.
Each unit is supplied new and in original factory packing, backed by a 12-month factory warranty. The 21000-28-05-15-050-03-02 is part of the trusted Bently Nevada 21000 series, known for its accuracy and long service life in applications such as turbines, compressors, and pumps.
Technical Specifications
The 21000-28-05-15-050-03-02 includes specific configuration options that tailor it to your measurement needs:
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Probe Option: 3300 XL 8 mm probe with connector, selectable for hazardous area approvals.
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Probe Cable Length: 0.5 m (20 in).
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Standoff Adapter: Minimum length 1.5 in (38 mm).
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Probe Penetration: 5 in.
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Fitting Option: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and one cable seal grip with grommets for cable sizes 1/8–3/16 in, 1/4–5/16 in, and 5/16–3/8 in.
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Mounting Thread: 3/4-14 NPT.
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Material: Aluminum body with 304 stainless steel sleeve.
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Weight: 1.1 kg (2.4 lb) typical, without fittings.
These specifications ensure the 21000-28-05-15-050-03-02 meets the demands of high-vibration environments while maintaining precise probe positioning.
Key Features & Benefits
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Explosion-Proof Rating: Certified for hazardous areas, allowing safe operation in potentially explosive atmospheres.
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CSA Type 4 Enclosure: Provides protection against water and dust ingress, enhancing reliability.
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API 670 Compliance: Fully compliant with the American Petroleum Institute standard for externally mounted proximity probe housings, ensuring industry-accepted performance.
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Versatile Fitting Options: Includes multiple adapters and grips to accommodate various cable sizes and installation requirements.
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Durable Construction: Aluminum body with stainless steel sleeve offers corrosion resistance and long-term stability.
Industry Applications
The 21000-28-05-15-050-03-02 is ideal for vibration monitoring in rotating equipment such as steam turbines, centrifugal compressors, and large pumps. In a typical turbomachinery application, the housing protects the proximity probe while maintaining precise gap settings, enabling accurate shaft displacement measurements. Its explosion-proof design makes it suitable for use in oil and gas facilities, chemical plants, and other hazardous environments where safety is paramount.
In a refinery setting, the 21000-28-05-15-050-03-02 can be installed on critical pumps to provide continuous vibration data, helping maintenance teams detect early signs of bearing wear or misalignment, thereby reducing unplanned downtime.
Installation & Setup Guidance
Proper installation is crucial for optimal performance. Follow these guidelines:
- Ensure the mounting thread (3/4-14 NPT) matches the machine's tapping. Use appropriate thread sealant to prevent leaks.
- Adjust the standoff adapter to achieve the required probe penetration of 5 in. Verify the probe tip is flush with the sleeve end.
- Connect the probe cable (0.5 m) securely, ensuring no strain on the connection. Use the provided cable seal grip to lock the cable in place.
- For hazardous area installations, confirm that the probe and housing are rated for the specific zone and gas group.
- After installation, perform a static gap check to ensure the probe is within its linear range.
Maintenance & Reliability
Regular inspection of the housing and probe is recommended to maintain accuracy. Check for any physical damage, loose fittings, or moisture ingress. The aluminum body and stainless steel sleeve resist corrosion, but periodic cleaning with a non-abrasive cloth is advised. Verify that the O-rings remain intact to preserve the enclosure rating. With proper care, the 21000-28-05-15-050-03-02 will deliver reliable service for years, minimizing costly downtime.
Selection Guide & Purchasing Advice
Before ordering, confirm your machine's mounting requirements and the necessary probe cable length. The 21000-28-05-15-050-03-02 includes a 0.5 m cable; if you need a different length, consider other suffix options. Also verify that the hazardous area certification matches your site's classification. For guaranteed authenticity and quality, purchase from PLC Source PRO, a trusted supplier of industrial automation spares.