21000-28-10-30-028-04-02 | Bently Nevada 8 mm Probe Housing Assembly

What Makes the 21000-28-10-30-028-04-02 Essential for Vibration Monitoring?

When hazardous area conditions demand reliable vibration monitoring, the 21000-28-10-30-028-04-02 from Bently Nevada delivers a robust solution. This proximity probe housing assembly combines an aluminum body with a 304 stainless steel sleeve, ensuring durability in harsh environments. With a 1.0 m probe cable length and 2.8 in probe penetration, it provides precise measurements for rotating machinery. The assembly is rated explosion proof for hazardous areas, meeting CSA Type 4 enclosure standards.

Key Features and Technical Specifications

• Probe option: 28 (3300 XL 8 mm probe with selectable hazardous area approvals).
• Probe cable length: 10 (1.0 m / 39 in).
• Standoff adapter: 30 (3 in).
• Probe penetration: 028 (2.8 in).
• Fitting option: 04 (one 3/4-14 NPT plug only).
• Mounting thread option: 02 (3/4-14 NPT).
• Material: aluminum body with 304 stainless steel sleeve.
• Maximum (C) + (D) dimension: 17.0 in (43.18 cm) with visible probe P/N and S/N.
• Maximum (C) + (D) dimension: 32.9 in (83.5 cm).
• Weight: 1.1 kg (2.4 lb) typical, without fittings.

Furthermore, the assembly includes a dome cover, threaded ports for conduit connections, a probe sleeve, O-rings, a reverse mount proximity probe, a thread seal, optional conduit fittings, and an optional standoff adapter. This comprehensive build ensures reliable performance in demanding industrial settings.

Applications and Use Cases

In industries like oil and gas, petrochemical, and power generation, the 21000-28-10-30-028-04-02 excels at monitoring shaft vibration and position in compressors, turbines, and pumps. Its CSA Type 4 explosion-proof certification makes it suitable for Class I Divisions 1 and 2 Groups C and D, as well as Class II Divisions 1 and 2 Groups E, F, and G. Consequently, engineers can deploy it in hazardous areas without compromising safety. Additionally, the housing complies with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings.

Installation and Setup Guidance

For proper installation, mount the housing using the 3/4-14 NPT thread option. Ensure the standoff adapter length is selected correctly; if the standoff adapter length option is 00, the mounting thread option must be ordered. The probe cable length of 1.0 m allows flexible placement near the measurement point. Always verify that the probe penetration of 2.8 in matches the target gap requirements. Refer to the manufacturer's manual for detailed wiring and torque specifications.

Maintenance and Reliability Tips

Regular inspection of the O-rings and thread seal is recommended to maintain the explosion-proof rating. Check the probe cable for any signs of wear or damage, especially near the connector. The aluminum body and stainless steel sleeve resist corrosion, but periodic cleaning with a dry cloth helps preserve performance. If the assembly is used in extreme temperatures (T5 @ Ta = -50°C to +40°C or T4 @ Ta = -50°C to +80°C), verify that the ambient conditions remain within limits. Following these steps extends service life and reduces downtime.

Compatibility and Integration

The 21000-28-10-30-028-04-02 integrates seamlessly with Bently Nevada monitoring systems that accept 3300 XL 8 mm probes. It supports both intrinsically safe and non-incendive circuits when connected per drawing 140979. The housing is also available with Canadian Standards Association (CSA) approvals for explosion-proof applications. For non-North American end users, standard 21000 housings can be ordered without the CA prefix.

Frequently Asked Questions

Q: What is the probe cable length for the 21000-28-10-30-028-04-02?

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

Q: Is the 21000-28-10-30-028-04-02 suitable for hazardous areas?

A: Yes, it is rated explosion proof for hazardous areas with CSA Type 4 enclosure certification, covering 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 weight of the 21000-28-10-30-028-04-02?

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

Q: What mounting thread does the 21000-28-10-30-028-04-02 use?

A: It uses a 3/4-14 NPT mounting thread (option 02).

Q: What is the probe penetration depth for this model?

A: The probe penetration is 2.8 in (suffix code 028).

Product Support and Availability

This Bently Nevada 21000-28-10-30-028-04-02 is available as new and original in factory packing from Petro Auto Tech. It comes with a 12-month factory warranty. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.