21000-28-10-20-018-03-02 | Bently Nevada 8 mm Proximity Probe Housing Assembly

Introduction to the Bently Nevada 21000-28-10-20-018-03-02

When you need dependable vibration monitoring in harsh environments, the 21000-28-10-20-018-03-02 from Bently Nevada delivers robust performance. This proximity probe housing assembly is part of the trusted 21000 series, engineered for externally mounted probes in rotating machinery. It combines an aluminum body with a 304 stainless steel sleeve for durability and corrosion resistance. The assembly includes a 3300 XL 8 mm probe with a 1.0 m cable, a 2-inch standoff adapter, and a 3-inch probe penetration. With CSA Type 4 enclosure certification and explosion-proof ratings for hazardous areas, it meets stringent safety standards. This guide helps you evaluate the 21000-28-10-20-018-03-02 for your application.

Key Features and Technical Specifications

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Probe Cable Length: 1.0 m (39 inches) for flexible installation.
• Standoff Adapter: 2 inches, allowing precise probe positioning.
• Probe Penetration: 3 inches, suitable for various machine configurations.
• Fitting Option: 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 cable sizes from 1/8 to 3/8 inches.
• Mounting Thread: 3/4-14 NPT for secure attachment.
• Material: Aluminum body with 304 stainless steel sleeve for strength and corrosion resistance.
• Weight: 1.1 kg (2.4 lb) typical without fittings.
• Compliance: RoHS compliant and CSA certified for explosion-proof applications (Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, and G, Class III, Enclosure Type 4, T5 @ Ta = -50°C to +40°C, T4 @ Ta = -50°C to +80°C).

A distinctive feature is the 8 mm probe size, which provides high sensitivity for detecting shaft vibrations in critical machinery. This makes the 21000-28-10-20-018-03-02 ideal for early fault detection.

Applications and Use Cases

In industrial settings, the 21000-28-10-20-018-03-02 is commonly used for vibration monitoring on pumps, compressors, turbines, and fans. Its explosion-proof rating allows safe operation in hazardous areas like oil refineries and chemical plants. For example, in a refinery, this housing assembly can continuously monitor a compressor shaft, providing early warnings of imbalance or misalignment. The CSA Type 4 enclosure ensures protection against dust and water ingress, making it suitable for outdoor installations. Additionally, its compliance with API 670 Standard guarantees reliable performance in externally mounted proximity probe applications.

Installation and Setup Guide

Installing the 21000-28-10-20-018-03-02 requires careful attention to mounting and wiring. First, select a location on the machine housing that provides a clear line of sight to the target shaft. Use the 3/4-14 NPT mounting thread to secure the assembly. The standoff adapter helps position the probe at the correct distance from the shaft. Connect the probe cable to the monitoring system, ensuring the cable seal grip is properly tightened to maintain the enclosure rating. For hazardous area installations, follow the wiring diagram (drawing 140979) to maintain non-incendive circuit integrity. Always verify the probe gap according to the manufacturer's specifications before operation.

Maintenance and Reliability

Regular inspection of the 21000-28-10-20-018-03-02 ensures long-term reliability. Check the cable and connectors for wear or damage every six months. Clean the housing exterior with a soft cloth to remove debris. The 304 stainless steel sleeve resists corrosion, but in aggressive environments, verify the O-rings and seals are intact. The aluminum body provides lightweight durability, reducing stress on the mounting point. By following a routine maintenance schedule, you can extend the service life of this assembly and minimize unplanned downtime.

Compatibility and Integration

The 21000-28-10-20-018-03-02 integrates seamlessly with Bently Nevada monitoring systems and other industrial vibration analysis equipment. It uses a standard 8 mm proximity probe, which is compatible with many eddy current displacement sensors. The 1.0 m cable length allows connection to junction boxes or directly to monitors. For systems requiring longer cable runs, consult the manufacturer's guidelines for signal integrity. The housing's CSA Type 4 rating ensures compatibility with most industrial enclosures.

Frequently Asked Questions about the 21000-28-10-20-018-03-02

Q: What is the probe size of the 21000-28-10-20-018-03-02?

A: The assembly uses a 3300 XL 8 mm probe, which is ideal for measuring shaft vibration in rotating machinery.

Q: Is this housing assembly suitable for hazardous areas?

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

Q: What is the cable length included with the probe?

A: The probe cable is 1.0 m (39 inches) long, providing flexibility for installation near the machine.

Q: What mounting thread does the 21000-28-10-20-018-03-02 use?

A: It uses a 3/4-14 NPT thread for secure attachment to the machine housing.

Q: What is the weight of this proximity probe housing assembly?

A: The typical weight is 1.1 kg (2.4 lb) without fittings, making it easy to handle during installation.

Product Support and Availability

The 21000-28-10-20-018-03-02 is in stock and ready to ship from Petro Auto Tech. We offer new and original factory-packed units with a 12-month warranty. For assistance with ordering or technical questions, contact our team. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.