Technical Specifications Breakdown
Key parameters for the 21000-28-05-20-065-03-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21000 Proximity Probe Housing Assemblies |
| Probe Option | 28 3300 XL 8 mm probe, selectable hazardous area approvals |
| Probe Cable Length | 05 0.5 m (20 in) |
| Standoff Adapter | 20=2 in |
| Probe Penetration | 065=6.5 in |
| Fitting Option | 03: One 3/4-14 NPT plug, One 3/4-14 to 1/2-14 NPT reducer, One cable seal grip with grommets for 1/8 to 3/16 inches, 1/4 to 5/16 inches, 5/16 to 3/8 inches |
| Mounting Thread Option | 02: 3/4-14 NPT |
| Material | 21000 Aluminum body with 304 stainless steel sleeve |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
| Maximum (C) + (D) Dimension | 13.5 in (34.3 mm) with 0.5 m cable |
| Certifications | CSA Type 4, Explosion-proof: Class I Div 1&2 Groups C,D; Class II Div 1&2 Groups E,F,G; Class III; T5 @ Ta = -50°C to +40°C; T4 @ Ta = -50°C to +80°C |
| Compliance | RoHS Directive 2011/65/EU, API 670 Standard |
Industry Applications for Enhanced Reliability
The CSA explosion-proof certification ensures safe operation in hazardous areas classified as Class I, Division 1 and 2, Groups C and D, as well as Class II environments. By integrating this assembly with a Bently Nevada monitoring system, engineers can achieve early detection of bearing wear, unbalance, and misalignment, reducing unplanned downtime.
Installation and Setup Guidance
Mount the housing using the 3/4-14 NPT thread option. Ensure the probe penetration of 6.5 inches is correctly set to achieve the desired gap voltage. The included fittings—a 3/4-14 NPT plug, a reducer, and a cable seal grip with three grommet sizes—allow for secure conduit connections. Always follow the manufacturer's wiring diagram (drawing 140979 for non-incendive circuits) and verify that the ambient temperature does not exceed the rated T-code limits.
Maintenance and Reliability
Inspect the O-rings and thread seal periodically to maintain the explosion-proof integrity. The aluminum body with a 304 stainless steel sleeve resists corrosion in most industrial atmospheres. For long-term reliability, verify that the cable seal grip grommets are properly sized for the cable diameter and that the dome cover is tightened to specification.
Robust Protection for Critical Vibration Monitoring
When monitoring rotating machinery in harsh industrial environments, the integrity of the proximity probe assembly is paramount. The Bently Nevada 21000-28-05-20-065-03-02 provides a rugged, explosion-proof housing designed to protect the sensitive 3300 XL 8mm probe while ensuring accurate, reliable measurements. This assembly is built to withstand demanding conditions, from extreme temperatures to corrosive atmospheres, making it an essential component for predictive maintenance programs.
Compatibility and Integration
This assembly is fully compliant with the API 670 Standard for externally mounted proximity probe housings. It is designed to work with Bently Nevada 3300 XL 8mm probes and can be ordered with hazardous area approvals for intrinsically safe applications. The 21000 housing is certified as a CSA Type 4 enclosure, ensuring protection against water ingress and dust.
Selection Guide and Purchasing Advice
When selecting a housing assembly, confirm that the probe penetration and standoff adapter length match your machine's geometry. The 21000-28-05-20-065-03-02 is a new, original factory-packed unit backed by a 12-month warranty. For lifecycle status and availability, please verify with AutoDCSTech before ordering. AutoDCSTech offers fast shipping and expert support for all Bently Nevada components.
Availability & Condition at AutoDCSTech
| Part Number | 21000-28-05-20-065-03-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
