21000-28-05-00-050-03-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the 21000-28-05-00-050-03-02 Proximity Probe Housing Assembly

When reliable vibration monitoring is critical for rotating machinery, the 21000-28-05-00-050-03-02 from Bently Nevada delivers a robust solution. This 21000 series housing assembly is designed for externally mounted proximity probes in harsh industrial environments. It combines an aluminum body with a 304 stainless steel sleeve for durability and corrosion resistance. The assembly includes a 3300 XL 8 mm probe with a 0.5 m cable, making it suitable for tight installations. Maintenance engineers appreciate its straightforward design and field-replaceable components.

Key Features and Technical Specifications of the 21000-28-05-00-050-03-02

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Probe Cable Length: 0.5 m (20 in) for compact mounting.
• Probe Penetration: 5 in (050) for deep measurement points.
• Fitting Option 03: Includes one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for cable sizes 1/8 to 3/8 inches.
• 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.
• Maximum (C) + (D) Dimension: 13.5 in (34.3 mm) with 0.5 m cable.

A distinctive feature is the 304 stainless steel sleeve, which provides superior protection in corrosive environments compared to standard aluminum-only housings. This extends service life and reduces maintenance frequency.

Applications and Use Cases for the Bently Nevada 21000-28-05-00-050-03-02

This housing assembly is ideal for monitoring vibration on pumps, compressors, turbines, and fans in oil and gas, petrochemical, and power generation facilities. Its CSA Type 4 enclosure rating ensures protection against dust and water ingress. The 3/4-14 NPT mounting thread simplifies integration into existing conduit systems. For retrofitting older installations, the 0.5 m cable length allows direct replacement without extensive rewiring.

Installation and Setup of the 21000-28-05-00-050-03-02

Mount the housing using the 3/4-14 NPT thread into a compatible port. The fitting kit includes a 3/4-14 NPT plug, a reducer to 1/2-14 NPT, and a cable seal grip. Select the appropriate grommet for your cable diameter (1/8 to 3/8 inches). Ensure the probe sleeve is fully inserted and the dome cover is tightened securely. Follow the manufacturer's manual for proper probe gap setting and wiring connections.

Maintenance and Reliability of the Proximity Probe Housing Assembly

Regularly inspect the housing for signs of corrosion or damage, especially in harsh environments. The 304 stainless steel sleeve resists rust, but the aluminum body may require periodic cleaning. Check the O-rings and thread seal for integrity to maintain the explosion-proof rating. Verify that the cable seal grip remains tight to prevent moisture ingress. With proper care, the 21000-28-05-00-050-03-02 provides long-term, reliable service.

Compatibility and Integration

This housing is designed for use with Bently Nevada 3300 XL 8 mm proximity probes. It is fully compliant with the API 670 Standard for externally mounted proximity probe housings. The CSA Type 4 enclosure ensures compatibility with hazardous area installations. For intrinsically safe applications, order hazardous area approved probes with the housing.

Frequently Asked Questions about the 21000-28-05-00-050-03-02

What is the probe cable length on the 21000-28-05-00-050-03-02?

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

What mounting thread does this housing use?

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

What materials are used in the housing?

The housing has an aluminum body with a 304 stainless steel sleeve.

Is this housing suitable for hazardous areas?

Yes, it is CSA certified for explosion-proof applications in Class I Divisions 1 and 2 Groups C and D, and Class II Divisions 1 and 2 Groups E, F, and G.

What is the weight of the assembly?

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

Product Support and Availability

The 21000-28-05-00-050-03-02 is available in stock and ready to ship from Petro Auto Tech. Contact our team for pricing and delivery options. We provide a 12-month factory warranty on all new and original parts.