31000-28-10-00-087-03-02 | Bently Nevada 3300 XL 8 mm Probe Housing

Introduction: The Evolution of Industrial Vibration Monitoring

For decades, industrial plants have relied on accurate vibration monitoring to protect rotating machinery. Early systems used simple enclosures that offered limited protection. However, as processes became more demanding, the need for robust, environmentally sealed housings grew. The Bently Nevada 31000-28-10-00-087-03-02 represents a modern solution in this evolution, combining durable materials with precise engineering.

This proximity probe housing is part of the 31000 series, designed to house a 3300 XL 8 mm probe. It offers a cable length of 1.0 m (39 in) and a probe penetration of 8.7 in. The housing is built to withstand harsh conditions, with a temperature rating of -51°C to +105°C (-60°F to +221°F).

Key Features and Technical Specifications

The 31000-28-10-00-087-03-02 is engineered with several notable features that enhance its performance and reliability.

• Probe Option: Compatible with 3300 XL 8 mm probe, with connector.
• Probe Cable Length: 1.0 m (39 in) cable for flexible installation.
• Probe Penetration: 8.7 in, suitable for various mounting depths.
• Fittings: Includes two plugs, one 3/4-14 NPT fitting, one 3/4-14 to 1/2-14 NPT SST reducer, and cable seal grips for multiple cable sizes.
• Mounting Thread: 3/4-14 NPT for secure installation.
• Housing Material: Glass-reinforced Polyphenylene Sulfide (PPS) thermoplastic with conductive fibers.
• Sleeve Material: AISI 304 stainless steel for the sleeve and retaining chain.
• Outer Sleeve and Screws: AISI 303 stainless steel for corrosion resistance.
• O-Ring Material: Neoprene® for effective sealing.
• Temperature Rating: -51°C to +105°C (-60°F to +221°F).
• Weight: 1.2 kg (2.6 lb).

One distinctive aspect is the housing's impact strength. It is certified by BASEEFA to withstand two separate 4 Joule (3.0 ft·lb) impacts at -39°C (-38°F) and at 115°C (239°F). Additionally, CSA verified that samples withstand a 7 Joule (5.2 ft·lb) impact at ambient temperature. This ruggedness ensures reliable operation in physically demanding environments.

Applications and Use Cases

This housing is ideal for use in industries such as oil and gas, power generation, and manufacturing, where rotating equipment like turbines, compressors, and pumps require continuous monitoring. Its robust construction protects the internal probe from moisture, dust, and mechanical impact. Moreover, the Type 4X and IP66 ratings ensure resistance to hose-directed water, making it suitable for outdoor or washdown areas. Consequently, the 31000-28-10-00-087-03-02 helps maintain accurate vibration data, which is critical for predictive maintenance and avoiding unplanned downtime.

Installation and Setup

Proper installation is essential for optimal performance. The housing features a 3/4-14 NPT mounting thread, which is required if a standoff adapter is used. The recommended torque for the retaining nut is 29.4 N·m (260 in·lb). During installation, ensure that the cable seal grips are correctly fitted to accommodate the cable sizes (1/8 to 3/16 inches, 1/4 to 5/16 inches, and 5/16 to 3/8 inches). It is also important to verify that the probe penetration of 8.7 in matches your application requirements. Always follow the manufacturer's guidelines for wiring and mounting to avoid damage.

Maintenance and Reliability

To maintain reliability, periodic inspection of the housing is recommended. Check the O-rings and seals for wear or damage, as they are critical for maintaining the IP66 and Type 4X protection. The stainless steel components resist corrosion, but regular cleaning with a mild detergent can help preserve their appearance. Additionally, verify that the mounting hardware remains tight. Because the housing is not designed to resist internal or external pressure, avoid pressurizing it. If you require pressure testing, contact the custom design department.

Compatibility and Integration

The 31000-28-10-00-087-03-02 is specifically designed for use with the 3300 XL 8 mm probe. It integrates seamlessly with Bently Nevada monitoring systems. The housing includes a connector option (option 28) that facilitates easy connection to the probe. For installations requiring a standoff adapter, the mounting thread option 02 (3/4-14 NPT) is required. Ensure that the cable length of 1.0 m (39 in) meets your routing needs. For other system integrations, consult the official Bently Nevada documentation or contact Petro Auto Tech for assistance.

Common Questions

Q: What is the temperature range for this housing?

A: The housing is rated for -51°C to +105°C (-60°F to +221°F).

Q: Does this housing come with a standoff adapter?

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

Q: What is the probe penetration depth?

A: The probe penetration option is 087, which corresponds to 8.7 inches.

Q: What cable sizes can the cable seal grip accommodate?

A: The grip fits cables of 1/8 to 3/16 inches, 1/4 to 5/16 inches, and 5/16 to 3/8 inches.

Product Support and Availability

The Bently Nevada 31000-28-10-00-087-03-02 is available through Petro Auto Tech. We are an independent supplier of industrial automation parts. Please contact us for current pricing and availability. We are committed to providing quality products and responsive support.