Technical Specifications Breakdown
Key parameters for the 24701-28-05-00-070-04-02 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 | 05 = 20 in (0.5 m) |
| Standoff Adapter | No standoff adapter = 00 |
| Probe Penetration | 070 = 0.7 in |
| Fittings Option | 04 = One 3/4-14 NPT plug only |
| Mounting Thread Option | 02 = 3/4-14 NPT |
| Body Material | 303 stainless steel body |
| Sleeve Material | 304 stainless steel sleeve |
| Weight (typical, without fittings) | 1.8 kg (4.1 lb) |
| Maximum (C) + (D) Dimension | 13.5 in (34.3 mm) |
Industry Applications for Reliable Shaft Monitoring
The Bently Nevada 24701-28-05-00-070-04-02 is engineered for continuous monitoring of radial shaft vibration and axial position in critical rotating equipment. In power generation, it helps detect early bearing wear or rotor imbalance in steam and gas turbines. In oil and gas, it supports compressor and pump protection by providing real-time proximity data. The 303 stainless steel body and 304 stainless steel sleeve resist corrosion in wet or chemically aggressive environments, extending service life and reducing unplanned downtime.

Installation and Setup Guidance
Install the housing assembly by threading the 3/4-14 NPT mounting thread into a compatible machine case port. Use the included 3/4-14 NPT plug for unused conduit openings to maintain enclosure integrity. Ensure the probe tip is positioned at the specified 0.7 in penetration depth for optimal gap voltage. The 0.5 m probe cable connects to an extension cable or monitor; verify cable routing avoids sharp bends and abrasive surfaces. Always follow the manufacturer's recommended torque values for stainless steel fittings.
Maintenance and Reliability
Periodically inspect the dome cover and O-rings for signs of wear or contamination. Clean the exterior with a mild solvent and lint-free cloth; do not disassemble the sealed housing. Verify that the probe cable connector remains tight and free of moisture. The stainless steel construction provides resistance to vibration and thermal cycling, but annual calibration checks of the entire monitoring chain are recommended.
Robust Vibration Monitoring for Critical Rotating Machinery
Industrial rotating assets such as turbines, compressors, and pumps demand precise, reliable vibration monitoring to prevent catastrophic failures. The Bently Nevada 24701-28-05-00-070-04-02 Proximity Probe Housing Assembly provides a rugged, sealed enclosure for reverse-mount proximity probes, ensuring accurate shaft displacement measurements in harsh environments. This assembly integrates a 3300 XL 8mm probe with a 0.5 m cable, a 0.7 in probe penetration, and a 3/4-14 NPT mounting thread, making it a direct-fit solution for retrofitting or new installations.

Selection Guide and Purchasing Advice
When ordering the Bently Nevada 24701-28-05-00-070-04-02, confirm that the probe cable length (0.5 m) and penetration depth (0.7 in) match your machine's geometry. If a standoff adapter is required, select a different suffix code. AutoDCSTech stocks this assembly as new and original in factory packing, backed by a 12-month warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Troubleshooting and Common Issues
If the proximity signal is erratic, check the probe cable connector for damage or loose contact. A sudden loss of signal may indicate a broken probe cable or a failed probe. Verify that the probe tip is not contacting the shaft surface; the 0.7 in penetration should provide adequate clearance. If readings drift, inspect the housing for moisture ingress or corrosion. For persistent issues, replace the assembly with a new unit from AutoDCSTech.
Availability & Condition at AutoDCSTech
| Part Number | 24701-28-05-00-070-04-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
