21000-28-10-20-039-03-02 | Bently Nevada 8 mm Probe Housing Assembly

What Is the Bently Nevada 21000-28-10-20-039-03-02?

When hazardous area monitoring demands robust vibration sensing, the 21000-28-10-20-039-03-02 from Bently Nevada provides a reliable solution. This proximity probe housing assembly is part of the 21000 series, designed for externally mounted probes in industrial environments. It includes a 3300 XL 8 mm probe with a 1.0 m (39 in) cable, a 2 in standoff adapter, and a 3.9 in probe penetration. The assembly comes with a 3/4-14 NPT mounting thread and a fitting kit containing a 3/4-14 NPT plug, a 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for cable sizes from 1/8 to 3/8 inches.

Key Features & Technical Specs of the 21000-28-10-20-039-03-02

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Cable Length: 1.0 m (39 in) probe cable.
• Standoff Adapter: 2 in length.
• Probe Penetration: 3.9 in.
• Mounting Thread: 3/4-14 NPT.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Enclosure Rating: CSA Type 4, explosion-proof for hazardous areas.
• Compliance: RoHS Directive 2011/65/EU.

One distinctive spec is the 3.9 in probe penetration, which allows deep insertion into machinery for accurate vibration measurement. This feature ensures reliable data in tight installations.

Applications & Use Cases

In petrochemical plants, the 21000-28-10-20-039-03-02 monitors rotating equipment like pumps and compressors in Class I Division 1 areas. Similarly, in gas processing facilities, it provides non-contact vibration sensing for turbines. Its CSA certification makes it suitable for explosive atmospheres, reducing downtime risks.

Installation Guide for the 21000-28-10-20-039-03-02

Mount the housing using the 3/4-14 NPT thread. Ensure the standoff adapter is correctly positioned for the required probe gap. The cable seal grip accommodates cables from 1/8 to 3/8 inches, so select the appropriate grommet. Tighten all fittings to prevent leakage in hazardous environments.

Routine Care & Reliability Tips

Inspect the O-rings and thread seal periodically for wear. Verify that the probe cable is not damaged and that the conduit connections remain secure. For long-term reliability, follow the manufacturer's maintenance schedule to avoid false readings.

Compatibility & Integration

The 21000-28-10-20-039-03-02 works with Bently Nevada monitoring systems that accept 8 mm proximity probes. It integrates with standard 3/4-14 NPT conduit systems. For hazardous area installations, ensure the circuit is non-incendive per drawing 140979.

FAQs about the 21000-28-10-20-039-03-02

Q: What is the probe cable length for this assembly?

A: The probe cable length is 1.0 m (39 in).

Q: Is this housing rated for explosive environments?

A: Yes, it 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.

Q: What mounting thread does the 21000-28-10-20-039-03-02 use?

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

Q: What is the typical weight of this assembly?

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

Q: Does it comply with RoHS requirements?

A: Yes, it complies with RoHS Directive 2011/65/EU.

Product Support & Availability

The Bently Nevada 21000-28-10-20-039-03-02 is in stock and ready to ship from Petro Auto Tech. Contact our team for ordering assistance and technical support.