21000-28-05-20-066-04-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the 21000-28-05-20-066-04-02

When industrial environments demand reliable vibration monitoring, the 21000-28-05-20-066-04-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is engineered for hazardous area applications, offering explosion-proof certification and a durable aluminum body with a 304 stainless steel sleeve. With a 0.5 m probe cable and a 2-inch standoff adapter, it ensures precise probe positioning for critical machinery protection.

Key Features and Technical Specs

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals
• Probe Cable Length: 0.5 m (20 in)
• Standoff Adapter: 2 in
• Probe Penetration: 6.6 in
• Fitting Option: One 3/4-14 NPT plug only
• Mounting Thread: 3/4-14 NPT
• Material: Aluminum body with 304 stainless steel sleeve
• Weight: 1.1 kg (2.4 lb) typical, without fittings
• Maximum (C) + (D) Dimension: 13.5 in (34.3 mm) with 0.5 m cable

The 8 mm probe size is a distinctive spec that enables precise measurement of shaft vibration and position in rotating machinery, reducing false alarms and improving maintenance planning.

Applications and Use Cases

In industries such as oil and gas, power generation, and petrochemical processing, the 21000-28-05-20-066-04-02 is used for externally mounted proximity probe housings. It fully complies with the American Petroleum Institute's (API) 670 Standard, ensuring compatibility with critical turbomachinery monitoring systems. For example, in a refinery, this housing protects probes monitoring compressor shaft vibration, enabling early detection of imbalance or misalignment.

Installation and Setup

Mounting the 21000-28-05-20-066-04-02 requires a 3/4-14 NPT threaded port. The standoff adapter of 2 in positions the probe at the correct distance from the target. Ensure the probe cable length of 0.5 m is sufficient for the conduit run. The fitting option includes one 3/4-14 NPT plug, which seals unused ports. Always follow the manufacturer's manual for torque specifications and wiring to maintain the explosion-proof rating.

Maintenance and Reliability

Regular inspection of the housing assembly is essential for long-term reliability. Check the O-rings and thread seal for wear, and verify that the dome cover is securely tightened. The aluminum body and stainless steel sleeve resist corrosion in harsh environments. Periodic verification of the probe's connection and cable integrity helps prevent signal degradation. This proactive approach reduces downtime and extends service life, aligning with cost-benefit goals.

Compatibility and Integration

The 21000-28-05-20-066-04-02 is designed for use with Bently Nevada monitoring systems and 3300 XL 8 mm proximity probes. It is available with Canadian Standards Association (CSA) approvals for explosion-proof applications in North America, including Class I Divisions 1 and 2 Groups C and D, and Class II Divisions 1 and 2 Groups E, F, and G. For intrinsically safe applications, hazardous area approved probes can be ordered. The housing is CSA Type 4 certified, ensuring protection against water and dust ingress.

FAQs about the 21000-28-05-20-066-04-02

Q: What is the probe cable length for the 21000-28-05-20-066-04-02?

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

Q: What mounting thread does this housing use?

A: It uses a 3/4-14 NPT mounting thread.

Q: Is the 21000-28-05-20-066-04-02 suitable for hazardous areas?

A: Yes, it is CSA certified for explosion-proof applications in hazardous areas.

Q: What is the weight of this housing assembly?

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

Q: What probe type is compatible with this housing?

A: It is designed for the 3300 XL 8 mm probe.

Product Support and Availability

The 21000-28-05-20-066-04-02 is available as new and original in factory packing from Petro Auto Tech. In stock and ready to ship, it comes with a 12-month factory warranty. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.