21000-16-05-15-034-03-02 Bently Nevada 3300 XL 8mm Assembly

Product Overview

The Bently Nevada 21000-16-05-15-034-03-02 is a professional-grade proximity probe housing assembly designed for hazardous area monitoring. This complete system integrates a 3300 XL 8mm proximity probe into a certified explosion-proof aluminum body with a 304 stainless steel sleeve. Weighing approximately 1.1 kg (typical, without fittings), it is fully compliant with API 670 standards, providing high-fidelity vibration and position data for critical rotating machinery while ensuring maximum safety in volatile environments.

Technical Configuration

This 21000-series model is configured for specific penetration depths and NPT conduit integration:

• Full Model: 21000-16-05-15-034-03-02
• Probe Option (16): Includes the 3300 XL 8 mm reverse-mount probe.
• Cable Length (05): 0.5 meter (20 inches) integrated probe lead.
• Standoff Adapter (15): 1.5-inch (38 mm) adapter length.
• Probe Penetration (034): 3.4-inch (approx. 86 mm) D-dimension.
• Fittings (03): Includes 3/4-14 NPT plug, reducer (3/4 to 1/2), and a multi-size cable seal grip.
• Mounting Thread (02): Standard 3/4-14 NPT mounting thread.

Technical Specifications

Installation & Maintenance

When installing the 21000-16-05-15-034-03-02, ensure the 3/4-14 NPT mounting thread is properly sealed to maintain the integrity of the explosion-proof enclosure. For penetration lengths in the 1.0 to 2.0-inch range, the machine case may require counter-boring to eliminate "side-view" interference. The dome cover screws securely into the housing body to protect the internal probe connections. With a 0.5m probe cable, the total reach (Standoff + Penetration) remains within the 13.5-inch visibility limit for the assembly.

Engineering Advantages

The Bently Nevada 21000 series offers ruggedized precision for industrial machinery protection. Its CSA Type 4 rating ensures it is submersible and dust-tight, suitable for harsh outdoor or chemical plant environments. The assembly is optimized for Class I (Groups C, D) and Class II (Groups E, F, G) zones, making it the premier choice for petroleum and power generation sectors. By meeting the stringent API 670 standards, this housing assembly guarantees reliable performance and standardized mounting for modern predictive maintenance programs.

Technical FAQs

Q1: What fittings are included with the '03' option?
A1: This configuration includes a 3/4-14 NPT plug, a 3/4 to 1/2 NPT reducer, and a cable seal grip with three grommet sizes to accommodate cables ranging from 1/8 to 3/8 inches.

Q2: Can the probe penetration depth be adjusted?
A2: Yes, this model features an adjustment range of ±13 mm (±0.5 in) on the D-dimension, allowing for fine-tuning during initial gapping.

Q3: Is this housing compatible with 5-meter and 9-meter systems?
A3: The housing contains the probe; total system length is determined by the probe lead (0.5m in this case) plus your chosen extension cable to match the Proximitor sensor's calibration.