Bently Nevada 21000-28-00-00-050-04-02 Proximity Probe Housing Assembly

Technical Specifications Breakdown

Key parameters for the 21000-28-00-00-050-04-02 are listed below for quick reference:

Real-World Applications in Rotating Machinery

The 5-inch probe penetration (Option D) allows the sensor to reach the shaft surface through thick machine casings. The 3/4-14 NPT mounting thread and conduit fittings simplify integration into existing conduit systems. For probe penetration lengths between 1.0 and 2.0 inches, counter boring the machine case reduces side view or rear view effects. For penetrations greater than 300 mm (12 in), sleeve support near the probe prevents resonance.

Installation and Setup Guidance

When installing the 21000-28-00-00-050-04-02, ensure the mounting thread (3/4-14 NPT) is properly sealed with thread sealant to maintain the explosion-proof rating. The adjustment range for the probe penetration option D is 13 mm (±0.5 in), allowing fine-tuning of the gap. Verify that the dome cover is tightened securely to maintain the CSA Type 4 enclosure integrity. Use the provided 3/4-14 NPT plug for unused conduit ports.

Maintenance and Reliability

Periodically inspect the housing assembly for signs of corrosion or mechanical damage, especially in harsh environments. The aluminum body with 304 stainless steel sleeve offers good corrosion resistance. Check O-rings during each maintenance cycle to ensure the seal remains intact. No internal adjustments are required beyond the initial gap setting.

Robust Protection for Critical Vibration Monitoring

For maintenance engineers working in rotating machinery protection, the Bently Nevada 21000-28-00-00-050-04-02 proximity probe housing assembly provides a reliable, explosion-proof enclosure for the 3300 XL 8 mm probe. This assembly is designed for externally mounted installations in hazardous areas, ensuring accurate shaft vibration and position measurements without compromising safety.

Selection Guide and Purchasing Advice

When ordering, verify that the suffix codes match your application requirements. The 21000-28-00-00-050-04-02 includes a 3300 XL 8 mm probe with selectable hazardous area approvals, no probe cable, no standoff adapter, 5-inch penetration, one 3/4-14 NPT plug, and 3/4-14 NPT mounting thread. For availability and lifecycle status, please verify with AutoDCSTech before ordering. AutoDCSTech stocks new and original factory-packed units with a 12-month warranty.