21000-28-05-00-065-04-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction: Reliable Vibration Monitoring with the 21000-28-05-00-065-04-02

When machine vibration threatens uptime, the 21000-28-05-00-065-04-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is engineered for hazardous area applications. It combines a 3300 XL 8 mm probe with a 0.5 m cable. The result is accurate, repeatable shaft displacement measurements. Engineers trust this assembly for critical rotating machinery.

Key Features and Technical Specifications

• The 21000-28-05-00-065-04-02 uses a 3300 XL 8 mm proximity probe with selectable hazardous area approvals.
• Probe cable length is 0.5 m (20 in) for flexible installation.
• Standoff adapter length is 00, meaning probe cable is not required.
• Probe penetration (Option D) is 6.5 in (065).
• The assembly includes one 3/4-14 NPT plug only (fittings option 04).
• Mounting thread is 3/4-14 NPT (option -02).
• Body is aluminum with a 304 stainless steel sleeve.
• Typical weight is 1.1 kg (2.4 lb) without fittings.

A distinctive spec is the 6.5 in probe penetration. This depth ensures the probe tip reaches the target shaft area. It reduces side view effects for accurate readings.

Applications and Use Cases

In oil and gas refineries, the 21000-28-05-00-065-04-02 monitors compressor shaft vibration. For power generation, it tracks turbine rotor displacement. The CSA Type 4 enclosure rating suits harsh outdoor environments. It fully complies with API 670 for externally mounted proximity probes. Therefore, it is ideal for critical rotating machinery.

Installation and Setup Guidance

Mount the housing using the 3/4-14 NPT thread. Ensure the probe penetration (C plus D) does not exceed 300 mm (12 in) to avoid resonance. If penetration is between 1.0 and 2.0 inches, counter bore the machine case. Adjust the probe penetration option D by 13 mm (± 0.5 in). Use the included 3/4-14 NPT plug for unused ports. Always follow Bently Nevada installation manual.

Maintenance and Reliability Tips

Inspect the O-rings and thread seal periodically. Check the probe cable for wear. The aluminum body and stainless steel sleeve resist corrosion. Regular inspection per manufacturer guidelines extends service life. This reduces unplanned downtime and maintenance costs.

FAQs about the 21000-28-05-00-065-04-02

Q: What is the probe cable length?

A: The probe cable length is 0.5 m (20 in).

Q: What mounting thread does this assembly use?

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

Q: What is the typical weight of the assembly?

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

Q: Is this assembly approved for hazardous areas?

A: Yes, the 3300 XL 8 mm probe has selectable hazardous area approvals. The housing is CSA Type 4 rated.

Q: What material is the housing body?

A: The body is aluminum with a 304 stainless steel sleeve.

Product Support and Availability

The 21000-28-05-00-065-04-02 is available as new and original in factory packing. Petro Auto Tech stocks this item for quick shipment. Contact Petro Auto Tech for lifecycle status and ordering details.