21000-34-05-20-039-04-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction: The Evolution of Reliable Vibration Monitoring

In the demanding world of industrial machinery, vibration monitoring has transformed from a reactive maintenance task to a proactive strategy for uptime. The 21000-34-05-20-039-04-02 from Bently Nevada represents this evolution, providing a robust housing solution for proximity probes in harsh environments. With its aluminum body and 304 stainless steel sleeve, this assembly ensures long-term durability and precise measurements. Engineers seeking dependable performance in hazardous areas will find this model a critical component for their monitoring systems.

Key Features & Technical Specs of the 21000-34-05-20-039-04-02

The 21000-34-05-20-039-04-02 is a proximity probe housing assembly designed for use with 3300 XL 8 mm probes. Its standout feature is the selectable hazardous area approvals, making it suitable for explosive environments. Below are the core specifications derived from the product data:

• Probe option: 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals.
• Probe cable length: 0.5 m (20 in).
• Standoff adapter: 2.0 in.
• Probe penetration: 3.9 in.
• Fitting option: One 3/4-14 NPT plug.
• Mounting thread: 3/4-14 NPT.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Maximum (C) + (D) dimension: 13.5 in (34.3 cm).
• Temperature range (3300 XL 8 mm probe): -51°C to +177°C (-60°F to +351°F).

These specs ensure the assembly meets the rigorous demands of continuous vibration monitoring in petrochemical, power generation, and other heavy industries.

Industry Applications & Use Cases

This housing assembly is ideal for externally mounted proximity probes in rotating machinery such as turbines, compressors, and pumps. Its CSA Type 4 enclosure rating and compliance with API 670 standard make it a trusted choice for refineries and chemical plants. For example, in a gas compression station, the 21000-34-05-20-039-04-02 provides reliable shaft vibration data, helping operators detect early signs of imbalance or misalignment. This proactive approach reduces unplanned downtime and extends equipment life.

Installation Guide for the 21000-34-05-20-039-04-02

Mounting this housing assembly requires attention to the probe penetration and standoff adapter settings. The 3/4-14 NPT mounting thread ensures a secure fit into standard conduit openings. When installing, verify that the probe cable length of 0.5 m is sufficient for the routing path. The optional standoff adapter allows for precise positioning relative to the shaft target. Always follow Bently Nevada's installation manual for torque specifications and wiring connections to maintain hazardous area certifications.

Maintenance & Reliability Tips

Regular inspection of the housing assembly is essential for long-term reliability. Check the O-rings and thread seal for signs of wear or contamination, especially in corrosive environments. The aluminum body and stainless steel sleeve resist corrosion, but periodic cleaning with a soft cloth is recommended. Given its explosion-proof rating, avoid any modifications that could compromise the enclosure integrity. For maximum uptime, schedule inspections during planned maintenance windows.

Compatibility & Integration

The 21000-34-05-20-039-04-02 is designed for use with Bently Nevada 3300 XL 8 mm proximity probes and compatible monitoring systems. It integrates seamlessly with Bently Nevada's vibration monitoring platforms, enabling real-time data acquisition and analysis. The assembly's CSA Type 4 rating ensures it meets the requirements for hazardous area installations, making it a versatile choice for global operations. For system integration, consult the official Bently Nevada documentation for wiring and configuration guidelines.

Common Questions About the 21000-34-05-20-039-04-02

Q: What is the maximum cable length for this housing assembly?

A: The probe cable length is 0.5 m (20 in), as specified in the ordering information.

Q: Is this housing assembly suitable for hazardous areas?

A: Yes, it is available with selectable hazardous area approvals and is CSA Type 4 rated for explosion-proof applications.

Q: What is the weight of the 21000-34-05-20-039-04-02?

A: The typical weight is 1.1 kg (2.4 lb) without fittings.

Q: What temperature range can the probe withstand?

A: The 3300 XL 8 mm probe operates and stores from -51°C to +177°C (-60°F to +351°F).

Q: Does this assembly comply with API 670?

A: Yes, it is fully compliant with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings.

Product Support & Availability

The 21000-34-05-20-039-04-02 is available as new and original in factory packing from Petro Auto Tech. With a 12-month factory warranty, it is ready to ship for your critical monitoring applications. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.