21000-28-05-30-039-04-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the 21000-28-05-30-039-04-02

When industrial machinery demands precise vibration monitoring, the 21000-28-05-30-039-04-02 from Bently Nevada delivers a robust solution. This proximity probe housing assembly is part of the trusted 21000 series, engineered for hazardous environments. It combines an aluminum body with a 304 stainless steel sleeve for durability. The unit supports a 3300 XL 8 mm probe with selectable hazardous area approvals. This makes it a reliable choice for critical rotating equipment protection.

Key Features of the 21000-28-05-30-039-04-02

• The housing includes a 0.5 m (20 in) probe cable length for flexible installation.
• A standoff adapter of 2 in provides precise probe positioning.
• Probe penetration of 3 in ensures accurate measurement depth.
• It comes with one 3/4-14 NPT plug for conduit connection.
• The mounting thread is 3/4-14 NPT, requiring ordering when standoff adapter length is not 00.
• Typical weight is 1.1 kg (2.4 lb) without fittings, simplifying handling.

One distinctive spec is the 8 mm probe size, which offers high sensitivity for small shaft vibrations. This feature enhances early fault detection in turbomachinery.

Applications for the 21000-28-05-30-039-04-02

This housing assembly is ideal for externally mounted proximity probes in compressors, turbines, and pumps. It meets the API 670 Standard for externally mounted probes. Consequently, it suits oil and gas, power generation, and petrochemical industries. The CSA Type 4 enclosure rating ensures protection against dust and water ingress. Therefore, it performs reliably in harsh outdoor or washdown environments.

Installation and Setup Guide

Mount the housing securely using the 3/4-14 NPT thread. Ensure the probe sleeve length matches the required penetration. The visible probe (with P/N and S/N) must not exceed the maximum (C) + (D) dimension of 13.5 in (34.3 mm). Use the provided thread seal and O-rings to maintain explosion-proof integrity. For non-incendive circuits, follow drawing 140979 for connection. Always verify the standoff adapter is correctly installed for accurate gap setting.

Maintenance and Reliability

Inspect the housing periodically for signs of corrosion or damage. The aluminum body with stainless steel sleeve resists environmental wear. Check O-rings and seals during routine shutdowns to preserve CSA certification. This design reduces downtime by extending service intervals. As a result, it lowers total cost of ownership for continuous monitoring systems.

Compatibility and Integration

The 21000-28-05-30-039-04-02 works with Bently Nevada 3300 XL 8 mm proximity probes. It integrates with monitoring systems requiring CSA explosion-proof enclosures. The housing is compatible with standard conduit fittings and standoff adapters. For intrinsically safe applications, order hazardous area approved probes. This ensures seamless integration into existing safety instrumented systems.

Frequently Asked Questions

Q: What is the probe cable length for the 21000-28-05-30-039-04-02?

A: The probe cable length is 0.5 m (20 in), as specified in the suffix code 05.

Q: Is the 21000-28-05-30-039-04-02 suitable for hazardous areas?

A: Yes, it is CSA certified for explosion-proof applications in Class I Divisions 1 and 2 Groups C and D, and Class II Divisions 1 and 2 Groups E, F, and G.

Q: What is the mounting thread size for this housing?

A: The mounting thread option is 3/4-14 NPT, as indicated by suffix code 02.

Q: Does the 21000-28-05-30-039-04-02 include a probe?

A: Yes, it includes a reverse mount proximity probe as part of the assembly.

Product Support and Availability

The 21000-28-05-30-039-04-02 is available in new and original factory packing from Petro Auto Tech. It comes with a 12-month factory warranty. Contact Petro Auto Tech for current lifecycle status and ordering details.