21000-28-05-15-012-04-02 | Bently Nevada 8 mm Proximity Probe Housing Assembly

Introduction to the 21000-28-05-15-012-04-02

When industrial rotating machinery requires precise vibration monitoring, engineers turn to robust proximity probe housings. The 21000-28-05-15-012-04-02 from Bently Nevada is a purpose-built solution for hazardous environments. This housing assembly integrates a 3300 XL 8 mm probe with a 0.5 m cable, ensuring accurate displacement measurements. Its aluminum body with a 304 stainless steel sleeve provides durability in demanding conditions.

Part of the trusted 21000 series, this model supports selectable hazardous area approvals. It is designed for use with CSA-certified explosion-proof enclosures. The assembly includes a dome cover, threaded ports, and an optional standoff adapter. Engineers appreciate its compliance with API 670 standards for externally mounted probes.

Key Features & Technical Specs of the 21000-28-05-15-012-04-02

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals
• Probe Cable Length: 0.5 m (20 in)
• Standoff Adapter: 1.5 in (38 mm)
• Probe Penetration: 1.2 in (012)
• Fitting Option: One 3/4-14 NPT plug
• Mounting Thread: 3/4-14 NPT
• Material: Aluminum body with 304 stainless steel sleeve
• Weight: 1.1 kg (2.4 lb) typical, without fittings
• Maximum (C) + (D) Dimension: 13.5 in (34.3 mm) with 0.5 m cable

A distinctive spec is the 1.2 in probe penetration, which allows precise positioning within the housing. This ensures consistent gap settings for accurate vibration readings. The 0.5 m cable length simplifies installation in tight spaces.

Applications & Use Cases

In petrochemical plants, the 21000-28-05-15-012-04-02 monitors shaft vibration on compressors and turbines. Its explosion-proof rating makes it suitable for Class I Division 1 and 2 areas. Similarly, in power generation, it provides reliable data for predictive maintenance. The housing’s CSA Type 4 enclosure protects against moisture and dust. Consequently, it reduces unplanned downtime in critical processes.

Installation Guide for the 21000-28-05-15-012-04-02

Mount the housing using the 3/4-14 NPT thread option. Ensure the standoff adapter is correctly positioned for the desired probe penetration. Connect the probe cable through the threaded ports. Tighten the dome cover securely to maintain the explosion-proof seal. Always follow the manufacturer’s manual for wiring and grounding.

Maintenance & Reliability

Regularly inspect the O-rings and thread seal for wear. Verify the dome cover is free from corrosion. The aluminum and stainless steel construction resists environmental degradation. Periodic checks every six months help maintain long-term reliability. This proactive approach extends service life and reduces replacement costs.

Compatibility & Integration

The 21000-28-05-15-012-04-02 integrates with Bently Nevada monitoring systems. It is fully compliant with API 670 standards for externally mounted proximity probes. The housing accepts 3300 XL 8 mm probes with selectable approvals. For intrinsically safe applications, order the CA21000 version. Ensure the system matches the probe’s cable length and connector type.

FAQ about the 21000-28-05-15-012-04-02

What is the probe cable length for this model?

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

What mounting thread does the 21000-28-05-15-012-04-02 use?

It uses a 3/4-14 NPT mounting thread.

Is this housing suitable for hazardous areas?

Yes, it is rated explosion-proof for CSA-certified hazardous areas.

What is the typical weight of this assembly?

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

What material is the housing body made of?

The body is aluminum with a 304 stainless steel sleeve.

Product Support & Availability

The 21000-28-05-15-012-04-02 is in stock and ready to ship from Petro Auto Tech. Contact our team for current lifecycle status and ordering details. We provide original factory-packed units with a 12-month warranty.