24701-28-05-00-140-04-02 | Bently Nevada 14 in Probe Housing

Introduction to the 24701-28-05-00-140-04-02

When machine vibration threatens uptime, the 24701-28-05-00-140-04-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is engineered for industrial environments where precise rotor vibration measurement is critical. It combines a 303 stainless steel body with a 304 stainless steel sleeve for durability and corrosion resistance.

As part of the 24701 series, this housing assembly is designed to protect and position a reverse mount proximity probe. It includes a dome cover, threaded ports for conduit connections, O-rings, and a thread seal. The assembly is supplied new in factory packing with a 12-month warranty.

Key Features and Technical Specifications

The 24701-28-05-00-140-04-02 offers several notable features that support reliable operation:

• Probe option: 3300 XL 8mm with approval option
• Probe cable length: 0.5 m (20 in)
• Probe penetration: 14 in
• Fittings: one 3/4-14 NPT plug only
• Mounting thread: 3/4-14 NPT
• No standoff adapter included
• Material: 303 stainless steel body, 304 stainless steel sleeve
• Weight: 1.8 kg (4.1 lb) typical without fittings

The 14-inch probe penetration is a standout specification. It allows the probe to reach deeper into machinery, which is essential for large rotating equipment where sensor placement is constrained. This depth capability ensures accurate vibration data even in tight installations.

Applications and Use Cases

This housing assembly is commonly used in turbomachinery, pumps, compressors, and motors where shaft vibration monitoring is essential. For example, in a steam turbine train, the 24701-28-05-00-140-04-02 can be mounted to monitor bearing vibration, helping operators detect imbalance or misalignment early. Its NPT fittings allow easy integration into existing conduit systems, simplifying installation.

Furthermore, the stainless steel construction makes it suitable for harsh environments, including those with moisture or chemical exposure. The 0.5 m cable length is ideal for installations where the monitor is close to the machine, reducing signal loss.

Installation and Setup

Proper installation is key to accurate readings. The housing assembly should be mounted using the 3/4-14 NPT thread, ensuring a secure fit. The included plug can be used to seal unused ports, maintaining environmental integrity. When installing, verify that the probe tip reaches the correct position relative to the shaft surface, as specified by Bently Nevada guidelines.

Because the assembly includes a reverse mount probe, follow the manufacturer's instructions for probe gap setting. Use the provided O-rings and thread seal to prevent leakage. Always consult the product manual for torque specifications and wiring details.

Maintenance and Reliability

Regular inspection of the housing assembly helps ensure long-term performance. Check for signs of wear on the O-rings and thread seal, and replace them if damaged. Periodically verify that all fittings remain tight and that the probe cable is not chafed or stressed.

The stainless steel construction resists corrosion, reducing maintenance frequency. However, in extreme environments, more frequent checks are advisable. Following a preventive maintenance schedule can extend the service life of the assembly and avoid unexpected downtime.

Compatibility and Integration

The 24701-28-05-00-140-04-02 is designed to work with Bently Nevada 3300 XL 8mm proximity probe systems. It is compatible with standard Bently Nevada monitors and accessories that accept this probe type. The 0.5 m cable length is suitable for direct connection to nearby junction boxes or extension cables.

For integration into existing systems, verify that the monitor's input specifications match the probe's output characteristics. The NPT mounting thread ensures compatibility with standard industrial conduit and mounting hardware.

Troubleshooting Common Issues

If vibration readings are erratic, first check the probe gap. Incorrect gap settings are a common cause. Also inspect the cable for damage and ensure all connections are secure. If the housing leaks, replace the O-rings and thread seal.

Another issue is interference from nearby electrical noise. Ensure that the probe cable is routed away from high-voltage lines. If problems persist, consult the Bently Nevada manual or contact Petro Auto Tech for technical support.

FAQ

Q: What is the probe cable length of the 24701-28-05-00-140-04-02?

A: The probe cable length is 0.5 m (20 inches).

Q: What is the mounting thread size?

A: The mounting thread is 3/4-14 NPT.

Q: Does this housing assembly include a standoff adapter?

A: No, the standoff adapter option is 00, meaning no standoff adapter is included.

Q: What is the probe penetration length?

A: The probe penetration is 14 inches.

Q: What materials are used in the construction?

A: The body is 303 stainless steel and the sleeve is 304 stainless steel.

Product Support and Availability

The 24701-28-05-00-140-04-02 is available from Petro Auto Tech, an industrial automation parts supplier. It is new and in original factory packing. Contact Petro Auto Tech for current availability and lead times.