21000-34-05-15-039-03-02 | Bently Nevada 0.5m Cable Proximity Probe Housing Assembly

Introduction to the Bently Nevada 21000-34-05-15-039-03-02

When reliable vibration monitoring is critical for rotating machinery, the 21000-34-05-15-039-03-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is designed for harsh industrial environments where accurate shaft displacement measurements are essential. Part of the trusted 21000 series, this model combines an aluminum body with a 304 stainless steel sleeve for durability and corrosion resistance.

Engineers responsible for machine protection systems will appreciate the thoughtful configuration of this assembly. It includes a 3300 XL 8 mm probe with connector protector, a 0.5 meter (20 inch) probe cable, and a 1.5 inch standoff adapter. The probe penetration is set at 3.9 inches, making it suitable for installations requiring precise positioning.

Key Features and Technical Specifications of the 21000-34-05-15-039-03-02

• Probe Type: 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals
• Probe Cable Length: 0.5 meters (20 inches)
• Standoff Adapter: 1.5 inches
• Probe Penetration: 3.9 inches
• Mounting Thread: 3/4-14 NPT
• Housing Material: Aluminum body with 304 stainless steel sleeve
• Maximum (C) + (D) Dimension: 13.5 inches (34.3 cm)
• Weight: 1.1 kg (2.4 lb) typical, without fittings

A distinctive feature of this assembly is the included fitting option. It comes with 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. This versatility simplifies installation across different conduit systems.

Applications and Use Cases for the 21000-34-05-15-039-03-02

In industrial settings, the 21000-34-05-15-039-03-02 excels at monitoring shaft vibration and position in turbines, compressors, pumps, and motors. Its CSA Type 4 enclosure rating and explosion-proof certification make it suitable for hazardous areas where intrinsic safety is required. Furthermore, the assembly fully complies with API 670 standards for externally mounted proximity probe housings.

For example, in a refinery application, this housing assembly can be installed on a large centrifugal compressor to provide continuous radial vibration data. The 0.5 meter cable length is ideal for close-coupled installations where the probe must be near the measurement point.

Installation and Setup Guidance

Mounting the 21000-34-05-15-039-03-02 requires proper thread engagement using the 3/4-14 NPT mounting thread. The standoff adapter length of 1.5 inches should be verified against the machine casing thickness to ensure correct probe gap. When connecting conduit, use the provided 3/4-14 NPT plug or the reducer for 1/2-14 NPT as needed. The cable seal grip accommodates cable diameters from 1/8 to 3/8 inches, so select the appropriate grommet for your cable.

Additionally, ensure the probe cable is routed without sharp bends to maintain signal integrity. The visible probe part number and serial number are not visible on this model, so record these details separately for future reference.

Maintenance and Reliability Considerations

Regular inspection of the O-rings and thread seal is recommended to maintain the explosion-proof integrity of the housing. Over time, environmental factors such as moisture or chemical exposure can degrade seals. By periodically checking these components, you can extend the service life of the assembly and avoid unplanned downtime.

The aluminum body with stainless steel sleeve offers excellent resistance to corrosion in most industrial atmospheres. However, in highly aggressive environments, additional protective coatings may be considered based on site conditions.

Frequently Asked Questions about the 21000-34-05-15-039-03-02

What is the probe cable length of the 21000-34-05-15-039-03-02?

The probe cable length is 0.5 meters (20 inches), as indicated by the suffix code 05.

What mounting thread does this assembly use?

The mounting thread is 3/4-14 NPT, specified by the suffix code -02.

Is this housing assembly suitable for hazardous areas?

Yes, it is available with CSA approvals and is rated explosion proof for hazardous areas. It can be ordered with intrinsically safe proximity probes.

What materials are used in the housing construction?

The body is aluminum, and the sleeve is 304 stainless steel for strength and corrosion resistance.

What is the typical weight of the 21000-34-05-15-039-03-02 without fittings?

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

Product Support and Availability

The Bently Nevada 21000-34-05-15-039-03-02 is available as new and original in factory packing from Petro Auto Tech. Each unit comes with a 12-month factory warranty. Please verify current lifecycle status and availability with Petro Auto Tech before ordering to ensure this model meets your project timeline.