Technical Specifications Breakdown
Key parameters for the 24701-28-05-20-040-03-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 24701 - Proximity Probe Housing Assemblies |
| Probe Option | 28 - 3300 XL 8mm, with approval option |
| Probe Cable Length | 0.5 m (20 in) |
| Standoff Adapter | 2.0 in |
| Probe Penetration | 4.0 in |
| Fittings Option | 03 - includes 3/4-14 NPT plug, reducer, and cable seal grip |
| Mounting Thread | 3/4-14 NPT |
| Body Material | 303 stainless steel |
| Sleeve Material | 304 stainless steel |
| Weight (typical, without fittings) | 1.8 kg (4.1 lb) |
Industry Applications
The 4.0 in probe penetration accommodates thick machine casings, while the 2.0 in standoff adapter provides proper probe tip clearance. The stainless steel construction resists corrosion in oil and gas, petrochemical, and power generation environments.

Installation & Setup Guidance
When installing the 24701-28-05-20-040-03-02, ensure the mounting thread (3/4-14 NPT) is properly sealed to prevent leakage. The included fittings—a 3/4-14 NPT plug, a 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with multiple grommet sizes—allow flexible conduit connections. Verify the probe cable length (0.5 m) is sufficient for the routing path. The maximum (C)+(D) dimension is 13.5 in (34.3 mm); ensure the assembly does not exceed this when installed.
Maintenance & Reliability
Periodically inspect the dome cover and O-rings for signs of wear or contamination. The 303 and 304 stainless steel body and sleeve offer resistance to moisture and chemicals. If the probe is not visible after installation, verify the assembly is correctly seated. The 12-month factory warranty covers manufacturing defects.
Robust Protection for Critical Vibration Monitoring
Industrial rotating machinery demands precise and reliable vibration monitoring. The Bently Nevada 24701-28-05-20-040-03-02 Proximity Probe Housing Assembly provides a rugged, sealed enclosure for the 3300 XL 8mm proximity probe, ensuring accurate shaft displacement measurements in harsh environments. This assembly protects the probe from contaminants and mechanical damage while maintaining signal integrity.

Compatibility & Integration
This housing is designed for use with Bently Nevada 3300 XL 8mm proximity probes. The 3/4-14 NPT mounting thread is standard for many industrial transducer mounting hardware. Ensure the monitoring system accepts the probe's output characteristics.
Selection Guide & Purchasing Advice
Select the correct probe penetration and standoff adapter for your machine's casing thickness and target clearance. The 24701-28-05-20-040-03-02 is new and original in factory packing. Please verify current lifecycle status and availability with AutoDCSTech before ordering. AutoDCSTech offers competitive pricing and fast shipping on Bently Nevada components.
Availability & Condition at AutoDCSTech
| Part Number | 24701-28-05-20-040-03-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
