Introduction
The Bently Nevada 24701-28-10-00-040-00-02 is a complete proximity probe housing assembly configured for use with a 3300 XL 8 mm proximity probe. Rather than functioning as a simple sensor alone, this assembly combines the probe, protective housing structure, cable arrangement, penetration length, and mounting interface into a practical installation package for rotating machinery monitoring.
This particular configuration features a 1.0 meter cable, no standoff adapter, 4-inch probe penetration, and 3/4-14 NPT mounting thread. The housing body is built around a stainless-steel construction intended to provide a robust mechanical environment for the proximity probe in demanding industrial installations.
For turbines, compressors, generators, and other critical rotating equipment, maintaining a properly positioned proximity probe is essential. The 24701 assembly addresses this requirement by providing a rigid housing arrangement that helps protect the sensing element while maintaining a controlled probe position relative to the monitored shaft.
Technical Specifications
The 24701 series is a configurable family of proximity probe housing assemblies. In this model, the ordering code identifies the principal configuration: 3300 XL 8 mm probe, 1.0 m cable, no standoff adapter, 4-inch penetration, no additional fittings, and 3/4-14 NPT mounting thread.
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 24701-28-10-00-040-00-02 |
| Product Type | Proximity Probe Housing Assembly |
| Housing Series | 24701 |
| Compatible Probe | 3300 XL 8 mm |
| Probe Option | 28 – 3300 XL 8 mm probe with multiple approvals |
| Cable Length | 1.0 m / 39 in |
| Standoff Adapter | None |
| Probe Penetration | 4.0 in |
| Fittings Option | 00 – Without additional fittings |
| Mounting Thread | 3/4-14 NPT |
| Housing Body Material | 303 stainless steel |
| Sleeve Material | 304 stainless steel |
| Housing Body Diameter | Approximately 78.2 mm |
| Maximum Overall Dimension | Approximately 29.2 in |
| Visible Probe Dimension | Approximately 17.0 in |
| Unit Weight | Approximately 1.8 kg / 4.1 lb |
| Typical Installation | Rotating machinery monitoring |
| Typical Equipment | Turbines, compressors, generators and other critical machinery |
Applications
Turbine Monitoring
The 24701 housing assembly is well suited to turbine installations where a 3300 XL 8 mm proximity probe must be securely positioned near the rotating shaft. Its rigid housing arrangement helps maintain the physical relationship between the probe and the measurement target.
Compressor Protection
Compressors depend on stable rotor operation, making shaft-position and vibration monitoring an important part of machinery protection. The housing assembly provides a structured mounting solution for the compatible 3300 XL probe.
Generator Monitoring
Generators and associated rotating equipment can benefit from non-contact shaft monitoring. A properly installed proximity probe housing helps establish a repeatable sensing position for condition-monitoring equipment.
Large Industrial Machinery
The extended penetration configuration can be useful where the sensing point is located deeper within the machine structure or where the installation requires a longer reach between the mounting point and the monitored shaft.
Machinery Maintenance and Retrofit Projects
For maintenance teams replacing an existing housing assembly, the complete part number provides a convenient way to reproduce a specific installation configuration. This can reduce unnecessary mechanical modifications during planned maintenance or equipment refurbishment.
Hazardous-Area Machinery Installations
The 24701 family includes configurations supporting different approval requirements. The exact approval status should always be confirmed from the complete ordering code and project documentation before installation in a classified area. The 24701 product family documentation identifies multiple 3300 XL 8 mm probe options and selectable approval configurations.
Advantages
Complete Housing Solution
The 24701-28-10-00-040-00-02 is more than a standalone proximity probe. It provides a configured housing assembly that integrates the probe with the mechanical structure required for installation.
Designed Around the 3300 XL 8 mm Probe
The assembly is specifically configured for a 3300 XL 8 mm probe, making it a strong choice for installations built around this established proximity-monitoring platform.
Robust Stainless-Steel Construction
The 303 stainless-steel body and 304 stainless-steel sleeve provide a durable mechanical structure for industrial applications where vibration, mechanical stress, and long-term service are important considerations.
4-Inch Probe Penetration
The 4-inch penetration configuration provides useful installation reach for machinery where the probe needs to extend into the monitoring location from the housing mounting point.
1.0 Meter Cable
The integrated 1.0 meter cable provides additional installation flexibility while keeping the selected housing assembly configuration clearly defined.
Secure NPT Mounting
The 3/4-14 NPT mounting interface provides a conventional threaded connection for appropriate industrial installation arrangements.
Stable Probe Positioning
A properly engineered housing can help maintain consistent probe alignment and mechanical stability, both of which are important for dependable proximity measurements.
Practical Lifecycle Support
For facilities maintaining existing Bently Nevada machinery-monitoring equipment, replacing a complete housing assembly can be a practical alternative to rebuilding individual mechanical components in the field.
Technical FAQs
1. What is the Bently Nevada 24701-28-10-00-040-00-02?
It is a 24701 Series proximity probe housing assembly configured with a 3300 XL 8 mm probe, 1.0 meter cable, 4-inch probe penetration, no standoff adapter, and a 3/4-14 NPT mounting interface.
2. Which probe is included in this housing assembly?
The configuration uses a 3300 XL 8 mm proximity probe. The “28” option in the 24701 ordering structure identifies the 3300 XL 8 mm probe configuration with multiple approval options.
3. How long is the cable?
The model includes a 1.0 meter (39-inch) probe cable. The cable length is identified by the “10” option in the ordering code.
4. What is the probe penetration length?
The “040” portion of the part number specifies a 4.0-inch probe penetration. This dimension is important when matching the assembly to the physical geometry of the machinery.
5. Does this model include a standoff adapter?
No. The “00” standoff option indicates that no standoff adapter is included in this configuration.
6. What mounting thread does the assembly use?
The final “02” option specifies a 3/4-14 NPT mounting thread. This should be matched with the existing machine mounting arrangement before installation.
7. What is the housing made from?
The 24701 housing family uses a 303 stainless-steel body with a 304 stainless-steel sleeve in the relevant configuration. This construction provides a robust mechanical enclosure for the proximity-probe assembly.
8. What are the dimensions of the 24701-28-10-00-040-00-02?
Available product information lists a housing body diameter of approximately 78.2 mm, a maximum overall dimension of approximately 29.2 inches, and a visible probe dimension of approximately 17.0 inches. Actual installation dimensions should be checked against the applicable engineering drawing.
9. How much does the assembly weigh?
The listed unit weight is approximately 1.8 kg (4.1 lb). Shipping weight may be higher because of protective packaging and accessories. Comparable 24701 assemblies are listed with approximately 3.0 kg shipping weight.
10. Can this housing assembly be used with another 3300 XL probe?
The housing configuration should not be assumed to be interchangeable with every 3300 XL probe. The 24701 ordering system specifies the probe type, cable length, penetration, fittings, and mounting arrangement. These parameters should be matched to the existing installation before selecting an alternative assembly.
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