21000-16-05-15-093-03-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction: Solving Vibration Monitoring Challenges with the 21000-16-05-15-093-03-02

When rotating machinery requires precise vibration measurement in hazardous environments, engineers need a rugged housing that protects the probe while maintaining accuracy. The 21000-16-05-15-093-03-02 from Bently Nevada addresses this need with a 3300 XL 8 mm probe and a 0.5 m (20 in) cable. This assembly is designed for external mounting per API 670 standards, ensuring reliable data collection even in demanding industrial settings.

Key Features and Technical Specifications

• Probe Type: 3300 XL 8 mm proximity probe with connector.
• Cable Length: 0.5 m (20 in) for flexible installation.
• Standoff Adapter: 1.5 in (38 mm) for precise positioning.
• Probe Penetration: 9.3 in (093) for deep machine case access.
• Mounting Thread: 3/4-14 NPT for secure attachment.
• Fittings: 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.
• Material: Aluminum body with 304 stainless steel sleeve for durability.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.

One distinctive feature is the 9.3 in probe penetration (option D), which allows the probe to reach deeper into the machine case for accurate measurements. This spec is critical for large rotating equipment where standard probes cannot reach the target.

Industry Applications and Use Cases

In petrochemical plants, the 21000-16-05-15-093-03-02 is commonly used for monitoring shaft vibration in compressors and turbines. Its CSA explosion-proof rating (Class 1 Divisions 1 and 2 Groups C and D) makes it suitable for hazardous areas. Additionally, the assembly meets API 670 standards, ensuring compatibility with industry best practices for externally mounted proximity probes.

Installation and Setup Guide

When installing the 21000-16-05-15-093-03-02, first select the appropriate mounting thread (default 3/4-14 NPT). For probe penetration lengths between 1.0 and 2.0 inches, counter boring the machine case may reduce side view effects. If the total probe penetration (C plus D) exceeds 300 mm (12 in), add sleeve support near the probe to prevent resonance. The adjustment range of option D is 13 mm (±0.5 in).

Maintenance and Reliability Tips

Regular inspection of the O-rings and cable seal grip helps maintain the enclosure's Type 4 rating. Verify that the conduit fittings remain tight to preserve the explosion-proof seal. For long-term reliability, follow the manufacturer's manual for periodic checks of the probe and housing assembly.

Compatibility and Integration

The 21000-16-05-15-093-03-02 is designed for use with Bently Nevada monitoring systems that accept 3300 XL 8 mm probes. It is fully compliant with API 670 and CSA Type 4 enclosure standards. The assembly supports both aluminum and stainless steel housing options for intrinsically safe applications.

FAQs about the 21000-16-05-15-093-03-02

What is the probe cable length for this assembly?

The cable length is 0.5 m (20 in) as indicated by suffix code 05.

What mounting thread does the 21000-16-05-15-093-03-02 use?

It uses a 3/4-14 NPT mounting thread, which is the default when the standoff adapter option is not 00.

Is this housing suitable for hazardous areas?

Yes, it is CSA certified for explosion-proof applications in Class 1 Divisions 1 and 2 Groups C and D, and Class 2 Divisions 1 and 2 Groups E, F, and G.

What is the typical weight of the assembly?

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

Product Support and Availability

The 21000-16-05-15-093-03-02 is available as new and original in factory packing from Petro Auto Tech. Please verify current lifecycle status and availability before ordering.