21000-16-05-00-055-03-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the Bently Nevada 21000-16-05-00-055-03-02

When you need reliable vibration monitoring in hazardous environments, the 21000-16-05-00-055-03-02 from Bently Nevada delivers proven performance. This proximity probe housing assembly is part of the 21000 series, engineered for externally mounted probes in demanding industrial settings. With a 3300 XL 8 mm probe and a 0.5 m cable, it provides accurate measurements while maintaining safety in explosive atmospheres.

As an industrial automation specialist, you understand that equipment reliability directly impacts uptime. The 21000-16-05-00-055-03-02 addresses this need by combining robust construction with certified protection. Its aluminum body and 304 stainless steel sleeve resist corrosion, while the CSA Type 4 enclosure ensures dust and water ingress protection. This assembly is fully compliant with API 670 standards, making it a trusted choice for rotating machinery monitoring.

Key Features and Technical Specifications

• Probe Type: 3300 XL 8 mm proximity probe with connector.
• Cable Length: 0.5 m (20 in) probe cable for flexible installation.
• Mounting Thread: 3/4-14 NPT for secure attachment.
• Fittings Included: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for multiple cable sizes.
• Material: Aluminum body with 304 stainless steel sleeve for durability.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Maximum Dimension (C + D): 13.5 in (34.3 mm) with visible probe P/N and S/N not visible.
• Certifications: CSA explosion-proof for hazardous areas; CSA Type 4 enclosure; compliant with API 670.

One distinctive spec is the 0.5 m probe cable length. This short cable reduces signal loss and simplifies routing in tight spaces, making it ideal for retrofit applications where existing conduit paths are limited.

Applications and Use Cases

The 21000-16-05-00-055-03-02 excels in monitoring critical rotating equipment such as turbines, compressors, and pumps. In petrochemical plants, its explosion-proof rating ensures safe operation in Class I, Division 1 areas. Similarly, in power generation facilities, the assembly provides reliable shaft vibration and position data, helping prevent unplanned downtime. Its API 670 compliance also makes it suitable for offshore platforms where stringent standards apply.

Installation and Setup

Mounting the 21000-16-05-00-055-03-02 is straightforward. First, select a location that allows the probe to face the target surface with the recommended gap. Use the 3/4-14 NPT mounting thread for a secure fit. The included fittings—a plug, reducer, and cable seal grip—accommodate conduit connections for cables from 1/8 to 3/8 inches. Ensure the probe cable is routed without sharp bends to maintain signal integrity. For hazardous areas, follow all local electrical codes and the manufacturer's installation manual.

Maintenance and Reliability

Regular inspection of the 21000-16-05-00-055-03-02 extends its service life. Check the O-rings and thread seal for wear, especially in corrosive environments. Verify that the dome cover is tight and that conduit connections remain sealed. The aluminum body and stainless steel sleeve resist corrosion, but periodic cleaning with a dry cloth is recommended. Because this assembly is used in safety-critical applications, always follow the manufacturer's maintenance guidelines for hazardous area equipment.

Compatibility and Integration

The 21000-16-05-00-055-03-02 works with Bently Nevada monitoring systems that accept 3300 XL 8 mm proximity probes. It integrates seamlessly with vibration monitors, data acquisition units, and protection relays. For intrinsically safe applications, pair it with hazardous area approved proximity probes. The CSA Type 4 enclosure ensures compatibility with outdoor installations, while the API 670 compliance guarantees interchangeability with other externally mounted housings.

Frequently Asked Questions

Q: What is the probe cable length of the 21000-16-05-00-055-03-02?

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

Q: Is this housing assembly certified for hazardous areas?

A: Yes, it is CSA approved as explosion proof for hazardous areas and is a CSA Type 4 enclosure.

Q: What mounting thread does the 21000-16-05-00-055-03-02 use?

A: It uses a 3/4-14 NPT mounting thread, specified by the suffix code -02.

Q: What fittings are included with this assembly?

A: It includes one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for cables from 1/8 to 3/8 inches.

Q: What is the weight of the 21000-16-05-00-055-03-02?

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

Product Support and Availability

The 21000-16-05-00-055-03-02 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.