21000-28-05-30-050-04-02 | Bently Nevada 0.5m Cable Proximity Probe Housing Assembly

Introduction to the 21000-28-05-30-050-04-02 Proximity Probe Housing Assembly

When hazardous area conditions demand reliable vibration monitoring, the 21000-28-05-30-050-04-02 from Bently Nevada delivers a robust solution. This proximity probe housing assembly is part of the 21000 series, designed for externally mounted probes in demanding industrial environments. It combines an aluminum body with a 304 stainless steel sleeve for durability. The unit supports a 3300 XL 8 mm probe with selectable hazardous area approvals. Engineers appreciate its compliance with API 670 standards. This model offers a 0.5 m probe cable length for flexible installation. It also includes a 3 in standoff adapter and 5 in probe penetration. The assembly is ideal for compressor, turbine, and pump monitoring applications.

Key Features and Technical Specifications of the 21000-28-05-30-050-04-02

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Probe Cable Length: 0.5 m (20 in) for compact installations.
• Standoff Adapter: 3 in for precise positioning.
• Probe Penetration: 5 in for deep mounting requirements.
• Fitting Option: One 3/4-14 NPT plug for conduit connection.
• Mounting Thread: 3/4-14 NPT for secure installation.
• Material: Aluminum body with 304 stainless steel sleeve for corrosion resistance.
• Weight: 1.1 kg (2.4 lb) typical without fittings.
• Certifications: CSA Type 4 enclosure, explosion-proof for Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, G, Class III.
• Temperature Ratings: T5 @ Ta = -50°C to +40°C; T4 @ Ta = -50°C to +80°C.

A distinctive feature is the 0.5 m probe cable length, which simplifies wiring in tight spaces. This reduces installation time and lowers the risk of cable damage. The 3/4-14 NPT mounting thread ensures compatibility with standard industrial fittings.

Applications and Use Cases for the 21000-28-05-30-050-04-02

This housing assembly is widely used in rotating machinery monitoring. It excels in steam turbines, centrifugal compressors, and large pumps. The explosion-proof certification makes it suitable for oil and gas refineries. It also works well in chemical processing plants and power generation facilities. By providing accurate proximity measurements, it helps prevent unplanned downtime. The unit supports both normal and hazardous area installations. Its compact design fits into existing machine train layouts without major modifications.

Installation and Setup Guide for the 21000-28-05-30-050-04-02

Mount the housing using the 3/4-14 NPT thread for a secure fit. Ensure the standoff adapter is set to 3 in for optimal probe positioning. Connect the probe cable (0.5 m) to the reverse mount probe inside the assembly. Use the included 3/4-14 NPT plug for conduit entry. Verify that the dome cover is tightened properly to maintain the Type 4 enclosure seal. Follow the manufacturer's torque specifications to avoid over-tightening. For hazardous areas, refer to the CSA approval drawing 140979 for non-incendive circuit connections.

Maintenance and Reliability of the 21000-28-05-30-050-04-02

Regular inspection of the housing assembly extends its service life. Check the O-rings and thread seal for wear during each maintenance cycle. The aluminum body and stainless steel sleeve resist corrosion in harsh environments. Ensure the conduit fittings remain tight to prevent moisture ingress. Clean the exterior with a dry cloth only; avoid solvents. The unit's robust design minimizes the need for frequent adjustments. This reliability reduces total cost of ownership over time.

Compatibility and Integration of the 21000-28-05-30-050-04-02

The 21000-28-05-30-050-04-02 integrates with Bently Nevada monitoring systems and third-party vibration analyzers. It works with 3300 XL 8 mm proximity probes for consistent performance. The housing is compatible with standard 3/4-14 NPT conduit fittings. For intrinsically safe applications, pair it with hazardous area approved probes. The CSA Type 4 enclosure ensures compatibility with outdoor installations. Always verify system compatibility with your existing monitoring hardware.

Frequently Asked Questions about the 21000-28-05-30-050-04-02

Q: What is the probe cable length of the 21000-28-05-30-050-04-02?

A: The probe cable length is 0.5 m (20 in).

Q: What certifications does this housing assembly have?

A: It has CSA Type 4 enclosure certification and is explosion-proof for hazardous areas as per the listed classifications.

Q: What is the mounting thread size?

A: The mounting thread is 3/4-14 NPT.

Q: What probe option is included?

A: It includes a 3300 XL 8 mm probe with selectable hazardous area approvals.

Q: What is the weight of the assembly?

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

Product Support and Availability

The 21000-28-05-30-050-04-02 is available from Petro Auto Tech in new and original factory packaging. It comes with a 12-month factory warranty. Contact Petro Auto Tech for current stock levels and lead times.