21000-28-10-30-065-04-02 | Bently Nevada 8 mm Probe Housing Assembly

What Is the Bently Nevada 21000-28-10-30-065-04-02?

When you need a robust housing for a proximity probe in hazardous environments, the 21000-28-10-30-065-04-02 from Bently Nevada delivers reliable performance. This aluminum body assembly includes a 304 stainless steel sleeve and supports a 3300 XL 8 mm probe with selectable hazardous area approvals. The probe cable length is 1.0 m (39 in), and the standoff adapter measures 3 in. With a probe penetration of 6.5 in, this unit fits many industrial vibration monitoring applications.

Part of the 21000 series, this housing assembly is designed for external mounting per API 670 standards. It comes with a 3/4-14 NPT plug and requires a mounting thread of 3/4-14 NPT. The typical weight is 1.1 kg (2.4 lb) without fittings, making it manageable for field installation.

Key Features and Technical Specs

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Probe Cable Length: 1.0 m (39 in).
• Standoff Adapter: 3 in.
• Probe Penetration: 6.5 in.
• Fitting Option: One 3/4-14 NPT plug.
• Mounting Thread: 3/4-14 NPT.
• Material: Aluminum body with 304 stainless steel sleeve.
• Maximum (C) + (D) Dimension: 32.9 in (83.5 cm) with 1.0 m cable.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Certifications: CSA Type 4 enclosure, explosion-proof for Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, and G, Class III, T5 @ Ta = -50°C to +40°C, T4 @ Ta = -50°C to +80°C.

One distinctive spec is the CSA Type 4 rating, which ensures the housing withstands harsh industrial environments and is fully compliant with API 670 for externally mounted probes.

Applications and Use Cases

This housing assembly is ideal for monitoring vibration in rotating machinery such as turbines, compressors, and pumps in oil and gas, petrochemical, and power generation facilities. Because it is rated explosion-proof, you can install it in Class I Division 1 hazardous areas without additional enclosures. The 8 mm probe provides accurate proximity measurements for shaft displacement and eccentricity monitoring.

Installation and Setup Guidance

Mount the 21000-28-10-30-065-04-02 using the 3/4-14 NPT mounting thread. Ensure the standoff adapter is properly secured to achieve the correct probe gap. The assembly includes a dome cover, threaded ports for conduit connections, and O-rings for sealing. Refer to the Bently Nevada manual for torque specifications and wiring instructions. Always verify that the probe cable length (1.0 m) meets your routing requirements before installation.

Maintenance and Reliability

Inspect the housing periodically for signs of corrosion or damage, especially in corrosive atmospheres. The aluminum body with stainless steel sleeve offers good resistance to environmental stress. Check O-rings and seals during routine maintenance to preserve the explosion-proof rating. Following the manufacturer's guidelines ensures long-term reliability and reduces unplanned downtime.

Compatibility and Integration

The 21000-28-10-30-065-04-02 is designed for use with Bently Nevada 3300 XL 8 mm proximity probes and compatible monitoring systems. It integrates seamlessly with Bently Nevada vibration monitoring racks and software. The CSA certification ensures it meets North American hazardous location requirements. For intrinsically safe applications, order the probe with appropriate hazardous area approvals.

Frequently Asked Questions

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

A: The probe cable length is 1.0 m (39 in), as indicated by the suffix code 10.

Q: Is the 21000-28-10-30-065-04-02 suitable for Class I Division 1 areas?

A: Yes, it is CSA certified for Class I Divisions 1 and 2 Groups C and D, making it suitable for explosive gas atmospheres.

Q: What mounting thread does this unit require?

A: It requires a 3/4-14 NPT mounting thread, and the fitting option includes one 3/4-14 NPT plug.

Q: What is the typical weight of this housing assembly?

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

Q: Can I use this housing with a 5 mm probe?

A: No, this assembly is designed for the 3300 XL 8 mm probe only, as specified by the probe option 28.

Product Support and Availability

The Bently Nevada 21000-28-10-30-065-04-02 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 stock status and lead times.