21000-28-05-20-051-04-02 | Bently Nevada 0.5m Cable Proximity Probe Housing Assembly

What Is the 21000-28-05-20-051-04-02?

When unplanned downtime drives up operational costs, the 21000-28-05-20-051-04-02 from Bently Nevada provides a robust solution for continuous vibration monitoring. This proximity probe housing assembly is designed to protect sensitive probes in harsh environments, reducing maintenance expenses and extending equipment life. By integrating a 3300 XL 8 mm probe with a 0.5 m cable, it delivers accurate data for predictive maintenance strategies.

Key Features and Technical Specs

• Probe Type: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Cable Length: 0.5 m (20 in) for flexible installation near machinery.
• Standoff Adapter: 2 in length ensures proper probe positioning.
• Probe Penetration: 5.1 in for deep insertion into bearing housings.
• Fitting: One 3/4-14 NPT plug for secure conduit connection.
• Mounting Thread: 3/4-14 NPT for standard industrial ports.
• Material: Aluminum body with 304 stainless steel sleeve for corrosion resistance.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.

The 0.5 m cable length reduces material waste and installation labor, directly lowering project costs. The aluminum and stainless steel construction ensures long service life in corrosive environments, minimizing replacement frequency.

Industry Applications

In rotating machinery such as pumps, compressors, and turbines, the 21000-28-05-20-051-04-02 enables early detection of shaft vibration and displacement. This proactive monitoring prevents catastrophic failures, reducing emergency repair costs by up to 30%. For example, in a petrochemical plant, this housing assembly can be mounted on a centrifugal compressor to continuously track rotor dynamics, allowing operators to schedule maintenance during planned shutdowns rather than reacting to unexpected breakdowns.

Installation Guide

Mount the housing using the 3/4-14 NPT thread into a pre-drilled port on the machine casing. Secure the standoff adapter to achieve the correct 2 in standoff distance. Connect the 0.5 m probe cable to the monitoring system, ensuring the fitting plug is tightened to prevent moisture ingress. Verify the probe tip is positioned at the specified 5.1 in penetration depth for optimal sensitivity. Always follow the manufacturer's manual for torque specifications.

Maintenance and Reliability

Inspect the housing and cable quarterly for signs of wear or corrosion. The aluminum body and stainless steel sleeve resist environmental damage, reducing the need for replacements. Regular checks of the NPT fitting and O-rings ensure a sealed enclosure, preventing contamination that could degrade signal quality. This low-maintenance design translates to lower total cost of ownership over the equipment's lifespan.

Compatibility and Integration

The 21000-28-05-20-051-04-02 is compatible with Bently Nevada monitoring systems that accept 3300 XL 8 mm probe inputs. It integrates seamlessly with existing vibration monitoring networks, supporting both new installations and retrofits. The CSA Type 4 enclosure rating allows use in hazardous areas, ensuring compliance with safety standards without additional enclosures.

Frequently Asked Questions

Q: What is the maximum cable length for this housing assembly?

A: The probe cable length is 0.5 m (20 in) as specified in the ordering information.

Q: Can this housing be used in explosive environments?

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

Q: What material is the housing body made of?

A: The body is aluminum with a 304 stainless steel sleeve for durability.

Q: What is the weight of the assembly without fittings?

A: The typical weight is 1.1 kg (2.4 lb).

Q: Is the 21000-28-05-20-051-04-02 RoHS compliant?

A: Yes, it complies with RoHS Directive 2011/65/EU.

Product Support and Availability

The 21000-28-05-20-051-04-02 is available as new and original in factory packing from Petro Auto Tech. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.