Product Overview

The Bently Nevada 24701-28-05-00-140-04-01 is a unique proximity probe housing assembly. This unit features a 3300 XL 8mm probe with multiple global approvals for hazardous areas. You get an as-cast mounting option with no factory threads for custom machining. It provides a very deep 14 inch probe penetration for thick-walled machinery. The assembly includes a dome cover, probe sleeve, and one NPT plug only.

Technical Specifications

Probe and Cable Configuration

• Probe Option: 3300 XL 8mm probe with multiple approval option.

• Probe Cable Length: 0.5 metres (20 inches).

• Standoff Adapter: Not included (option -00).

• Probe Penetration (C Dimension): 14 inches (356 mm).

• Maximum (C) + (D) Visible Probe: Not visible (P/N and S/N hidden).

• Maximum (C) + (D) Total Dimension: 13.5 inches (34.3 mm).

Fittings and Mounting

• Fittings Option (04): One 3/4-14 NPT plug only included.

• Mounting Thread Option (01): As cast without threads.

• No Reducer Included: This option excludes the 3/4-14 to 1/2-14 NPT reducer.

• No Cable Seal Grip: This option excludes the cable seal grip and grommets.

• Unthreaded Housing: You must machine your own mounting threads if needed.

Materials and Construction

• Body Material: 303 stainless steel.

• Sleeve Material: 304 stainless steel.

• Dome Cover: Screws directly into the housing body.

• Threaded Ports: Present for conduit connections.

• Included Components: O-rings, thread seal, reverse mount proximity probe.

• No Standoff Adapter: The probe mounts directly to the target surface.

• As-Cast Mounting: No pre-cut threads on the mounting surface.

Physical Characteristics

• Typical Weight: 1.8 kg (4.1 lb) without fittings.

• Probe Cable Length: 0.5 metres (20 inches) total.

• Probe Type: Reverse mount configuration with approvals.

• Housing Design: Screw-type dome cover for easy access.

• Penetration Depth: 14 inches for very deep mounting scenarios.

Installation Guide

Follow these steps to install the Bently Nevada 24701-28-05-00-140-04-01 correctly. First, machine your required mounting threads into the as-cast housing surface. Second, install the single 3/4-14 NPT plug into one conduit port. Third, run the probe cable through the remaining conduit port to your monitoring system. Fourth, mount the housing to your machine using your custom-threaded connection. Fifth, verify the probe penetration reaches exactly 14 inches to the target. Sixth, screw the dome cover onto the housing body after checking the probe gap. Finally, seal all connections according to your hazardous area requirements.

Package Contents

• 1 x Dome cover that screws into the housing body.

• 1 x Housing body with threaded conduit ports (303 stainless steel).

• 1 x Probe sleeve (304 stainless steel) with 14 inch penetration.

• 1 x Reverse mount proximity probe (3300 XL 8mm probe with approvals).

• 1 x Set of O-rings for sealing.

• 1 x Thread seal compound.

• 1 x 3/4-14 NPT plug only (no reducer, no cable seal grip).

• 0 x Standoff adapter (not included with option -00).

• Note: Mounting surface comes as cast without pre-cut threads.

Frequently Asked Questions (FAQ)

Q1: Why does the Bently Nevada 24701-28-05-00-140-04-01 have as-cast mounting threads?
A: The -01 mounting option means the housing comes without any pre-cut threads. This allows you to machine custom threads for your specific mounting requirement. You get maximum flexibility for non-standard machine interfaces.

Q2: What is the probe penetration depth for this housing assembly?
A: The probe penetration reaches 14 inches (140 suffix code). This is the deepest standard option for the 24701 series. It works perfectly for machines with very thick casings or remote mounting locations.

Q3: Can I use the Bently Nevada 24701-28-05-00-140-04-01 in a hazardous area?
A: Yes, the probe option 28 means this includes a 3300 XL 8mm probe with multiple global approvals. However, you must provide your own approved conduit fittings. The single NPT plug seals one port, but the other port needs your fitting.

Q4: How do I machine threads into the as-cast mounting surface?
A: You can cut 3/4-14 NPT threads or any custom thread size you need. The as-cast material is 303 stainless steel which machines easily. Always use sharp cutting tools and proper lubrication for best results.

Q5: What fittings come with the Bently Nevada 24701-28-05-00-140-04-01?
A: Only one 3/4-14 NPT plug is included (option -04). You get no reducer and no cable seal grip with grommets. You must supply all other conduit fittings for your specific installation needs.