24701-28-05-20-024-03-02 Bently Nevada 24701 Proximity Probe Housing

Product Overview

The 24701-28-05-20-024-03-02 is a high-performance environmental enclosure from the Bently Nevada 24701 series. It is specifically engineered to protect 3300 XL 8mm proximity transducers in demanding industrial environments. This assembly allows engineers to adjust or replace sensors externally without machine disassembly. 

Technical Configuration Tree

• [24701] Housing Base Assembly — Rugged 303 Stainless Steel Body
  • [-28] Probe Option: 3300 XL 8mm Reverse Mount (with approvals)
  • [-05] Cable Length: 0.5 Meter (20 inch) integrated probe cable
  • [-20] Standoff Adapter: 2.0 inch extension for external mounting
  • [-024] Probe Penetration: 2.4 inch reach into machine case
  • [-03] Fittings Package:
    • One 3/4-14 NPT plug and 1/2-14 NPT reducer
    • Triple-size cable seal grip (1/8" to 3/8" cables)
  • [-02] Mounting Thread: 3/4-14 NPT system connection

Material & Mechanical Specifications

• Housing Construction: Grade 303 Stainless Steel for corrosion resistance.
• Sleeve Component: Grade 304 Stainless Steel for high-rigidity probe support.
• Unit Weight: Approximately 1.8 kg (4.1 lb) typical configuration.
• Environmental Sealing: High-performance O-rings and thread seals included.
• Maximum Dimension: 13.5 inches (34.3 mm) combined (C)+(D) length.
• Conduit Ports: Dual threaded ports for flexible wiring and grounding.

Installation & Operational Diagnostics

• External gap adjustment allows for sensor calibration while the machine is running.
• Inspect the cable seal grommets during commissioning to prevent moisture ingress.
• The 24701 dome cover protects internal connectors from high-pressure washdowns.
• Ensure the thread seal is fully seated to maintain the IP-rated enclosure integrity.

Global PLC Spare HUB's Insight

The 24701-28-05-20-024-03-02 is an essential component for vibration monitoring on turbines and compressors. Our technical review confirms that the 2.4-inch penetration provides optimal clearance for medium-sized bearing housings. This modular 24701 design significantly reduces maintenance time. We suggest verifying the standoff length against any external insulation thickness before final installation.

Typical Application Scenarios

• Turbine Protection: Steam and gas turbine bearing vibration monitoring.
• Compression Systems: Centrifugal compressor shaft position sensing.
• Pumping Stations: Large-scale industrial pumps requiring API 670 compliance.
• Extreme Environments: Applications involving oil mist or high-pressure spray.

Compatible Equipment

• Bently Nevada 3300 XL 8mm Proximity Transducer Systems.
• Standard 3/4-14 NPT Conduit and Junction Boxes.
• API 670 Machinery Protection System Racks.

Shipping and Warranty Terms

• Condition: Guaranteed New & Original in factory-sealed packing.
• Warranty: 12-month standard factory warranty coverage.
• Dispatch: Shipping processed within 24 to 48 hours of order confirmation.
• Express Logistics: Global delivery via FedEx, UPS, and DHL.

Professional FAQ and Selection Guide

How do I select the correct standoff adapter length for my 24701 assembly?

Base your selection on the external clearance needed to reach the probe while avoiding machine obstructions.

Can I replace the internal probe without removing the entire housing?

Yes, the 24701-28-05-20-024-03-02 uses a reverse-mount probe that extracts from the top.

What is the benefit of the -03 fitting option for the 24701 series?

It provides multiple grommet sizes to ensure a watertight seal for various extension cable diameters.

Is this housing assembly compatible with non-XL 8mm probes?

This specific configuration is optimized for the 3300 XL series to ensure mechanical fit and signal accuracy.

What maintenance is required for the 24701-28-05-20-024-03-02?

Periodically check the O-ring condition and ensure the dome cover is tightened to prevent oil leaks.

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