24701-28-05-00-040-04-02 | Bently Nevada 8mm Proximity Probe Housing

Product Overview: 24701-28-05-00-040-04-02

When machinery vibration threatens uptime, the 24701-28-05-00-040-04-02 from Bently Nevada provides a robust mounting solution for 3300 XL 8mm proximity probes. This housing assembly is engineered to protect the probe in demanding industrial environments, ensuring reliable vibration and position monitoring.

Part of the 24701 series, this assembly includes a dome cover, threaded ports for conduit, a probe sleeve, O-rings, a reverse mount proximity probe, and a thread seal. It is built with a 303 stainless steel body and a 304 stainless steel sleeve for corrosion resistance and durability.

Key Features and Technical Specifications

• Probe option: 3300 XL 8mm with approval option
• Probe cable length: 0.5 m (20 in)
• Probe penetration: 4 in (040)
• Fittings: One 3/4-14 NPT plug only
• Mounting thread: 3/4-14 NPT
• Standoff adapter: None
• Maximum (C) + (D) dimension: 13.5 in (34.3 mm)
• Weight: 1.8 kg (4.1 lb) typical, without fittings

These specifications ensure precise probe positioning and secure installation, which are critical for accurate vibration measurement.

Applications and Use Cases

This housing assembly is ideal for turbomachinery, pumps, motors, and other rotating equipment where proximity probes monitor shaft vibration and axial position. For example, in a steam turbine train, the 24701-28-05-00-040-04-02 mounts the probe near the bearing to detect radial vibration. Moreover, its stainless steel construction suits harsh environments, including offshore platforms and chemical plants. Consequently, it helps maintenance teams identify issues early, reducing unplanned downtime.

Installation and Setup

Installation requires careful attention to the mounting thread and probe penetration. The 3/4-14 NPT mounting thread provides a standard connection, while the 4-inch penetration allows the probe to reach the target surface. Ensure the standoff adapter is not used, as the mounting thread option is specified for this configuration. Additionally, verify the cable length of 0.5 m suits the routing path. For best results, follow the manufacturer's guidelines for torque and gap settings.

Maintenance and Reliability

Regular inspection of the housing assembly is essential to maintain monitoring accuracy. Check for loose fittings, damaged O-rings, or corrosion on the stainless steel surfaces. Because the probe is reverse-mounted, ensure the cable is not stressed. Periodically verify the probe's gap voltage using a calibrator. These practices extend the service life of the assembly and prevent false readings.

Compatibility and Integration

The 24701-28-05-00-040-04-02 is designed for Bently Nevada 3300 XL 8mm proximity probes. It integrates with Bently Nevada monitoring systems, such as 3500 series racks, which accept proximity probe signals. The standard NPT fittings allow connection to conduit systems, simplifying wiring to the monitor.

Troubleshooting and Common Issues

If vibration readings are erratic, check the probe gap and cable continuity. A loose mounting thread can cause signal noise, so re-torque the housing. Also, inspect the O-rings for wear, as they prevent moisture ingress. If the probe is not visible, verify the penetration depth is correct. For persistent issues, consult the Bently Nevada manual.

FAQ about 24701-28-05-00-040-04-02

Q: What is the probe cable length for this housing?

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

Q: What mounting thread does this assembly use?

A: It uses a 3/4-14 NPT mounting thread.

Q: Is a standoff adapter included?

A: No, the standoff adapter option is 00, meaning none.

Q: What is the probe penetration depth?

A: The probe penetration is 4 inches.

Q: What material is the housing made of?

A: The body is 303 stainless steel, with a 304 stainless steel sleeve.

Product Support and Availability

This item is new and in original factory packing, backed by a 12-month factory warranty. Petro Auto Tech offers this product for immediate shipment. Contact Petro Auto Tech for availability and ordering details.