21000-28-05-00-070-01-02 | Bently Nevada 8 mm Probe Housing Assembly

What Is the Bently Nevada 21000-28-05-00-070-01-02?

When you need a robust solution for externally mounted proximity probes in hazardous areas, the 21000-28-05-00-070-01-02 from Bently Nevada delivers. This housing assembly is designed for 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 explosion-proof rating and compliance with API 670 standards. This model ensures accurate vibration monitoring in rotating machinery.

Key Features & Technical Specs

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Probe Cable Length: 0.5 m (20 in) for flexible installation.
• Standoff Adapter: 0 in, simplifying mounting.
• Probe Penetration: 7 in (070) for deep insertion into machinery.
• Fitting Option: One 3/4-14 NPT explosion-proof fitting and one plug.
• Mounting Thread: 3/4-14 NPT, required when standoff adapter is not used.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Certifications: CSA 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, Enclosure Type 4.
• Temperature Rating: T5 @ Ta = -50°C to +40°C; T4 @ Ta = -50°C to +80°C.

This housing assembly is certified as a CSA Type 4 enclosure. It is fully compliant with the API 670 Standard for externally mounted proximity probe housings. The 21000-28-05-00-070-01-02 is available with Canadian Standards Association (CSA) approvals for hazardous areas. You can order it with intrinsically safe proximity probes for added safety.

Real-World Applications

In petrochemical plants, the 21000-28-05-00-070-01-02 monitors shaft vibration in compressors and turbines. Its explosion-proof design makes it ideal for Class I Division 1 areas. Similarly, in power generation, this housing assembly provides reliable data for predictive maintenance. The 7 in probe penetration allows deep insertion into bearing housings. This ensures accurate readings even in tight spaces. For oil and gas refineries, the unit's stainless steel sleeve resists corrosion. This extends service life in harsh environments.

Installation Guide

Mount the housing using the 3/4-14 NPT thread. This is required when the standoff adapter is not used. Ensure the probe cable length of 0.5 m is sufficient for your conduit run. The explosion-proof fitting and plug must be properly sealed. Follow the manufacturer's manual for torque specifications. Always verify the mounting orientation to avoid cable strain. For hazardous areas, connect per drawing 140979 to maintain non-incendive circuit rating.

Routine Care & Reliability

Inspect the housing periodically for signs of wear or corrosion. Check the O-rings and thread seal during each maintenance cycle. The aluminum body and stainless steel sleeve resist environmental damage. This reduces the need for frequent replacements. By following a regular inspection schedule, you can maximize the unit's lifespan. This proactive approach minimizes unplanned downtime and lowers overall costs.

Integration Guide

The 21000-28-05-00-070-01-02 integrates with Bently Nevada monitoring systems. It accepts a 3300 XL 8 mm probe with selectable approvals. The housing is compatible with standard conduit fittings. For North American end users, the CA21000 version is available. For other regions, use the standard 21000 model. The unit's CSA Type 4 enclosure ensures compatibility with most industrial setups.

Troubleshooting & Common Issues

If you experience signal loss, check the probe cable connection. Ensure the cable length of 0.5 m is not exceeded. Verify that the explosion-proof fitting is properly tightened. In case of false readings, inspect the probe tip for debris. The 7 in penetration depth should be maintained. If the housing shows signs of corrosion, replace the stainless steel sleeve. Always consult the Bently Nevada manual for detailed diagnostics.

FAQs about the 21000-28-05-00-070-01-02

What is the probe cable length?

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

What is the mounting thread size?

The mounting thread is 3/4-14 NPT, required when the standoff adapter is not used.

What certifications does this housing have?

It is CSA certified for explosion-proof applications in Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, G, Class III, Enclosure Type 4.

What is the typical weight?

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

Can I use this housing with intrinsically safe probes?

Yes, you can order hazardous area approved proximity probes with this housing for intrinsically safe applications.

Product Support & Availability

The Bently Nevada 21000-28-05-00-070-01-02 is in stock and ready to ship. Petro Auto Tech provides this new and original unit in factory packing. Contact our team for availability and ordering details. We offer a 12-month factory warranty for peace of mind.