21000-28-10-15-039-03-02 | Bently Nevada 8 mm Proximity Probe Housing Assembly

What Is the 21000-28-10-15-039-03-02?

When you need a rugged, externally mounted proximity probe housing for hazardous areas, the 21000-28-10-15-039-03-02 from Bently Nevada provides a reliable solution. This assembly combines an aluminum body with a 304 stainless steel sleeve, ensuring durability in demanding industrial environments. It is part of the 21000 series, designed for use with 3300 XL 8 mm proximity probes.

The 21000-28-10-15-039-03-02 includes a probe cable length of 1.0 m (39 in), a standoff adapter of 1.5 in (38 mm), and a probe penetration of 3.9 in. It comes with a 3/4-14 NPT mounting thread and 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 from 1/8 to 3/8 inches. This configuration makes it suitable for applications requiring precise vibration monitoring in rotating machinery.

Key Features and Technical Specifications

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals
• Probe Cable Length: 1.0 m (39 in)
• Standoff Adapter: 1.5 in (38 mm)
• 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
• Certifications: CSA explosion-proof for Class I Divisions 1 and 2 Groups C, D, E, F, G; Class II; Class III; Enclosure Type 4; T5 @ Ta = -50°C to +40°C, T4 @ Ta = -50°C to +80°C; RoHS compliant

One distinctive feature is the selectable hazardous area approval, which allows you to choose the appropriate probe for your specific environment. This flexibility reduces the need for multiple housing variants, simplifying inventory management.

Applications and Use Cases

The 21000-28-10-15-039-03-02 is ideal for monitoring vibration and position in critical rotating equipment such as turbines, compressors, and pumps. Its CSA explosion-proof rating makes it suitable for use in oil and gas refineries, chemical plants, and other hazardous locations. For example, in a refinery, this housing can be mounted externally on a compressor casing to provide reliable proximity probe measurements without exposing the probe to harsh conditions. Additionally, its compliance with API 670 Standard ensures it meets industry requirements for externally mounted proximity probe housings.

Installation and Setup Guide

Installing the 21000-28-10-15-039-03-02 involves mounting the housing using the 3/4-14 NPT thread. The included cable seal grip accommodates cable sizes from 1/8 to 3/8 inches, providing a secure seal. Ensure the standoff adapter is properly positioned to achieve the correct probe gap. For hazardous area installations, follow the wiring diagram provided in the product manual to maintain non-incendive circuit integrity. Always verify that the mounting surface is clean and flat to avoid misalignment.

Maintenance and Reliability

Regular inspection of the 21000-28-10-15-039-03-02 helps ensure long-term reliability. Check the O-rings and seals periodically for wear, especially in environments with temperature extremes or corrosive atmospheres. The aluminum body with stainless steel sleeve resists corrosion, but routine visual checks can prevent unexpected failures. By maintaining the housing, you extend the service life of the proximity probe assembly and reduce overall maintenance costs.

Compatibility and Integration

The 21000-28-10-15-039-03-02 works with Bently Nevada 3300 XL 8 mm proximity probes. It integrates seamlessly with Bently Nevada monitoring systems, providing accurate vibration data for analysis. The housing is designed for external mounting, making it compatible with a wide range of rotating machinery. For non-hazardous area applications, standard 21000 housings are available, while CA21000 and CA24701 housings are certified for North American hazardous locations.

Frequently Asked Questions

Q: What is the probe cable length for the 21000-28-10-15-039-03-02?

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

Q: What certifications does this housing have?

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

Q: What is the mounting thread size?

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

Q: What is the weight of the assembly?

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

Q: Can this housing be used in intrinsically safe applications?

A: Yes, with hazardous area approved proximity probes, it can be used in intrinsically safe applications.

Product Support and Availability

The 21000-28-10-15-039-03-02 is available as a new, original factory-packed unit from Petro Auto Tech. It comes with a 12-month factory warranty. Contact Petro Auto Tech for current lifecycle status and availability before ordering.