Bently Nevada 24701-28-05-XX-028-04-XX MOD 323933-30-02 Proximity Probe Housing Assembly

Technical Specifications Breakdown

Key parameters for the 24701-28-05-XX-028-04-XX MOD 323933-30-02 are listed below for quick reference:

Application in Rotating Machinery Monitoring

This housing assembly is purpose-built for permanent installation on industrial rotating equipment. The 3300 XL 8mm probe inside measures shaft radial vibration and axial position relative to the machine casing. Typical applications include:

• Steam and gas turbines: Monitoring bearing vibration to detect imbalance, misalignment, or bearing wear.
• Centrifugal and reciprocating compressors: Providing continuous gap voltage data for surge protection and performance optimization.
• Large electric motors and pumps: Enabling predictive maintenance by tracking shaft displacement trends over time.

By using this assembly, maintenance teams can reduce unplanned downtime and extend machinery life through early fault detection.

Installation Guidance for Reliable Measurement

Proper installation is critical for accurate readings. The housing mounts directly to the machine case using the specified mounting thread option (XX). For this unit, the mounting thread option is XX, which can be selected as 01 (as cast without threads), 02 (3/4-14 NPT), 03 (1-11 1/2 NPT), 04 (1/2-14 BSP), or 05 (7/8-14 UNF-2A) per application requirements. The probe sleeve length is determined by the standoff adapter (XX), which can be ordered in 0.5 in (13 mm) increments from 1.5 in (38 mm) to 7.5 in (191 mm) or omitted (00). The probe penetration is fixed at 2.8 in (028). Ensure the housing is securely tightened and the conduit fittings (one 3/4-14 NPT plug included) are sealed to prevent moisture ingress. Always verify the probe tip gap according to Bently Nevada guidelines before startup.

Maintenance and Reliability Considerations

The 303 stainless steel body and 304 stainless steel sleeve provide corrosion resistance in most industrial environments. Periodic inspection of the housing for physical damage, seal integrity, and conduit connection tightness is recommended. The O-rings and thread seal should be replaced if any leakage is observed. The assembly does not require internal lubrication or adjustment. For long-term reliability, ensure the cable is not subjected to sharp bends or tensile loads beyond the specified 0.5 m length.

Robust Protection for Critical Vibration Monitoring

Industrial rotating machinery demands reliable, consistent vibration measurement to prevent catastrophic failures. The Bently Nevada 24701-28-05-XX-028-04-XX MOD 323933-30-02 Proximity Probe Housing Assembly provides a rugged, sealed enclosure for the 3300 XL 8mm proximity probe, ensuring accurate gap voltage and displacement readings in harsh environments. Designed for permanent installation on compressors, turbines, pumps, and motors, this assembly protects the probe from physical damage, moisture, and contaminants while maintaining precise tip-to-target clearance.

Compatibility and Integration

This housing is designed exclusively for Bently Nevada 3300 XL 8mm proximity probes (probe option 28). It is compatible with Bently Nevada monitoring systems that accept 8mm probe inputs, such as 3500, 3300, and 2300 series racks. The 3/4-14 NPT plug fitting allows connection to standard conduit systems. The assembly does not include the probe itself; the 3300 XL 8mm probe must be ordered separately.

Selection Guide and Purchasing Advice

When ordering, specify the standoff adapter length (XX) and mounting thread option (XX) to match your machine case geometry. The 24701-28-05-XX-028-04-XX MOD 323933-30-02 is available as New & Original in Factory Packing with a 12-month factory warranty from AutoDCSTech. Please verify current lifecycle status and availability with AutoDCSTech before ordering.