21000-34-00-20-039-04-02 | Bently Nevada 8 mm Probe Housing Assembly

What Is the 21000-34-00-20-039-04-02?

When you need a robust solution for externally mounted proximity probes, the 21000-34-00-20-039-04-02 from Bently Nevada delivers. This aluminum housing assembly features a 304 stainless steel sleeve and supports a 3300 XL 8 mm probe with connector protector. It is designed for hazardous area approvals and meets API 670 standards. The housing includes a dome cover, threaded ports, and an optional standoff adapter. This model comes with a 2.0 in standoff adapter and a 3.9 in probe penetration. It also includes one 3/4-14 NPT plug for conduit connections. The assembly weighs 1.1 kg (2.4 lb) typical without fittings. It is a reliable choice for industrial vibration monitoring systems.

Key Features and Technical Specs

• The 21000-34-00-20-039-04-02 uses an aluminum body with a 304 stainless steel sleeve.
• It supports a 3300 XL 8 mm probe with connector protector for selectable hazardous area approvals.
• The standoff adapter length is 2.0 in, and the probe penetration is 3.9 in.
• It includes one 3/4-14 NPT plug as a fitting option.
• The mounting thread option is 3/4-14 NPT.
• Maximum probe cable length is 1.0 m, with a visible probe dimension of 17.0 in (43.18 cm).
• Maximum (C) + (D) dimension is 32.9 in (83.5 cm).
• Typical weight is 1.1 kg (2.4 lb) without fittings.

Applications and Use Cases

This housing assembly is ideal for monitoring vibration in rotating machinery like turbines, compressors, and pumps. It is fully compliant with API 670 standards for externally mounted proximity probes. The CSA Type 4 enclosure rating makes it suitable for harsh industrial environments. For intrinsically safe applications, you can order hazardous area approved probes. This model helps prevent unplanned downtime by enabling accurate vibration measurement.

Installation Guide

Mount the housing using the 3/4-14 NPT thread option. Ensure the standoff adapter is properly aligned with the probe sleeve. Use the provided 3/4-14 NPT plug for conduit connections. Verify the probe cable length does not exceed 1.0 m. Follow the manufacturer's manual for torque specifications. Always check the hazardous area approval before installation.

Maintenance and Reliability

Inspect the housing periodically for wear or corrosion. The aluminum body with stainless steel sleeve resists environmental damage. Replace O-rings if leakage occurs. Regular inspection per manufacturer's safety manual ensures long service life. This design reduces maintenance costs by providing reliable protection for the probe.

Compatibility and Integration

This housing works with Bently Nevada 3300 XL 8 mm proximity probes. It is compatible with CSA Type 4 enclosures and API 670 compliant systems. The 3/4-14 NPT mounting thread integrates with standard conduit fittings. For hazardous areas, use approved probes and fittings. Contact Petro Auto Tech for integration support.

Troubleshooting and Common Issues

If the probe does not fit, check the standoff adapter length (2.0 in) and probe penetration (3.9 in). Verify the mounting thread is 3/4-14 NPT. For signal issues, ensure the probe cable length is within 1.0 m. If the housing leaks, inspect the O-rings and thread seal. Always follow the manufacturer's manual for diagnosis.

FAQs about 21000-34-00-20-039-04-02

Q: What is the standoff adapter length for this model?

A: The standoff adapter length is 2.0 in.

Q: What probe type does this housing support?

A: It supports a 3300 XL 8 mm probe with connector protector.

Q: Is this housing rated for hazardous areas?

A: Yes, it is available with CSA explosion-proof ratings when ordered with specific options.

Q: What is the weight of this assembly?

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

Q: What mounting thread does it use?

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

Product Support and Availability

The 21000-34-00-20-039-04-02 is in stock and ready to ship from Petro Auto Tech. It comes with a 12-month factory warranty. Contact our team for technical support or ordering assistance.