21000-28-05-00-052-03-02 | Bently Nevada 8 mm Probe Housing Assembly

What Is the 21000-28-05-00-052-03-02?

When you need a durable enclosure for your proximity probe in harsh industrial environments, the 21000-28-05-00-052-03-02 from Bently Nevada delivers robust protection. This housing assembly is designed for 8 mm probes and features an aluminum body with a 304 stainless steel sleeve. It weighs 1.1 kg (2.4 lb) typical without fittings.

Part of the 21000 series, this model includes a 0.5 m (20 in) probe cable and a 5.2 in probe penetration. It comes with one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for various cable sizes. The mounting thread is 3/4-14 NPT.

Key Features & Technical Specs

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Cable Length: 0.5 m (20 in) probe cable.
• Probe Penetration: 5.2 in.
• Fittings: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, cable seal grip.
• Mounting Thread: 3/4-14 NPT.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical without fittings.
• Certifications: CSA Type 4, explosion-proof for hazardous areas, RoHS compliant.

One distinctive spec is the 0.5 m cable length, which allows for close mounting in tight spaces while maintaining signal integrity.

Real-World Applications

Maintenance engineers often use the 21000-28-05-00-052-03-02 in rotating machinery monitoring, such as turbines and compressors. Its explosion-proof rating makes it ideal for oil and gas, chemical, and petrochemical facilities. The housing meets API 670 standards for externally mounted proximity probes.

For example, in a refinery, this assembly protects the probe from vibration and contamination while providing reliable vibration and position measurements.

Installation Guide

When installing the 21000-28-05-00-052-03-02, ensure the mounting surface is clean and flat. Use the provided 3/4-14 NPT fittings for conduit connections. The cable seal grip accommodates cable sizes from 1/8 to 3/8 inches. Torque all fittings to manufacturer specifications. Verify the probe tip is properly positioned within the housing before tightening.

Routine Care

Inspect the housing periodically for signs of corrosion or damage. Check the O-rings and seals for wear. Keep the cable seal grip tight to maintain the explosion-proof rating. Follow the manufacturer's manual for any maintenance procedures. Regular inspection helps extend the service life of the assembly.

Compatible Systems

The 21000-28-05-00-052-03-02 integrates with Bently Nevada vibration monitoring systems. It is designed for use with 3300 XL 8 mm proximity probes. The housing 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.

Common Questions about the 21000-28-05-00-052-03-02

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

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

Q: Is this housing suitable for hazardous areas?

A: Yes, it is CSA certified explosion-proof for hazardous areas per the provided data.

Q: What probe does this housing accept?

A: It accepts 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.

Q: What mounting thread does it use?

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

Product Support & Availability

The 21000-28-05-00-052-03-02 is available as new and original in factory packing from Petro Auto Tech. Please verify current lifecycle status and availability before ordering.