Bently Nevada 21000-28-05-20-051-04-02 Proximity Probe Housing Assembly

Technical Specifications Breakdown

Key parameters for the 21000-28-05-20-051-04-02 are listed below for quick reference:

Industry Applications: Protecting Critical Assets

The CSA Type 4 enclosure and explosion-proof rating (Class I Divisions 1 and 2 Groups C and D) make it suitable for Zone 1 hazardous areas. The 3300 XL 8 mm probe provides reliable shaft vibration and position measurements, helping operators detect early bearing wear or imbalance.

Installation and Setup Guidance

When installing the 21000-28-05-20-051-04-02, ensure the mounting thread (3/4-14 NPT) is properly sealed with the provided thread seal. The standoff adapter (2 in) positions the probe at the correct gap. The probe cable length of 0.5 m (20 in) is fixed; plan conduit routing accordingly. Use the single 3/4-14 NPT plug for conduit entry. Always follow the manufacturer's wiring diagram (drawing 140979) for non-incendive circuit connections.

Maintenance and Reliability

Periodically inspect the dome cover O-rings and conduit seals for signs of degradation. The aluminum body with 304 stainless steel sleeve resists corrosion in harsh environments. Verify the probe tip and target surface are free of debris. No internal adjustments are required; the assembly is factory-calibrated.

The Engineering Challenge: Reliable Vibration Monitoring in Hazardous Environments

In rotating machinery monitoring, maintaining probe integrity in explosive atmospheres is critical. The Bently Nevada 21000-28-05-20-051-04-02 proximity probe housing assembly addresses this challenge directly. Designed for use with a 3300 XL 8 mm probe, this assembly provides a robust, sealed enclosure that meets CSA explosion-proof standards, ensuring continuous vibration data collection without compromising safety.

Compatibility and Integration

This housing is fully compliant with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings. It is compatible with Bently Nevada 3300 XL series monitors and systems. The CSA certification covers North American hazardous locations; for other regions, order the standard 21000 housing.

Selection Guide and Purchasing Advice

When selecting a replacement or new installation, verify that the probe penetration (5.1 in) and standoff adapter (2 in) match your machine's clearance requirements. The 21000-28-05-20-051-04-02 is available new and original in factory packing from AutoDCSTech with a 12-month factory warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.