21000-00-00-00-00--03-02 | Bently Nevada Proximity Probe Housing Assembly

What Is the 21000-00-00-00-00--03-02?

When harsh environments demand reliable vibration monitoring, the 21000-00-00-00-00--03-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is part of the 21000 series, engineered for explosion-proof applications in hazardous areas. It features an aluminum body with a 304 stainless steel sleeve, ensuring durability in demanding industrial settings. With CSA certification for Class I Division 1 and 2 Groups C and D, this housing meets stringent safety standards. Its design includes a dome cover, threaded ports, and a probe sleeve, making it a versatile choice for external mounting per API 670.

Key Features and Technical Specs

• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Mounting Thread Option: Two plugs, one 3/4-14 NPT fitting, one 3/4-14 to 1/2-14 NPT SST reducer, and a cable seal grip with grommets for cable sizes 1/8 to 3/8 inches.
• Alternative Mounting: 3/4-14 NPT required for standoff adapter option.
• CSA Certification: Explosion-proof for North America, Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, G, Class III, Enclosure Type 4, T5 @ Ta = -50°C to +40°C, T4 @ Ta = -50°C to +80°C.
• RoHS Compliant: Meets Directive 2011/65/EU.

One distinctive spec is the CSA Type 4 enclosure rating, which ensures the housing withstands water ingress and dust, ideal for outdoor or washdown environments.

Industry Applications

In oil and gas refineries, the 21000-00-00-00-00--03-02 monitors rotating machinery like pumps and compressors. Its explosion-proof certification makes it suitable for chemical plants where flammable gases exist. Additionally, power generation facilities use this housing for turbine vibration monitoring, benefiting from its API 670 compliance. Consequently, it reduces unplanned downtime by providing accurate proximity measurements.

Installation Guide

Begin by selecting the appropriate mounting thread option. For standard setups, use the 3/4-14 NPT fitting with the included reducer and cable seal grip. Ensure the probe sleeve penetrates correctly—0.0 inches is the default. Secure the housing using the two plugs and tighten the dome cover. Always verify that the cable grommet matches your cable diameter (1/8 to 3/8 inches) to maintain the explosion-proof seal.

Routine Care and Reliability

Inspect the O-rings and thread seal annually for wear. Clean the exterior with a damp cloth; avoid solvents that may damage the aluminum body. The stainless steel sleeve resists corrosion, extending service life in humid environments. Regular checks of the conduit connections prevent moisture ingress. This proactive maintenance aligns with cost-benefit goals by minimizing replacement costs.

Compatibility and Integration

The 21000-00-00-00-00--03-02 works with Bently Nevada proximity probes and systems. It accepts reverse mount probes and optional standoff adapters. The housing integrates with CSA-approved intrinsically safe circuits when connected per drawing 140979. For non-incendive operation, ensure the circuit meets Class I Division 2 requirements.

FAQs about the 21000-00-00-00-00--03-02

Q: What is the weight of the 21000-00-00-00-00--03-02?

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

Q: Is this housing explosion-proof?

A: Yes, it is CSA certified for explosion-proof applications in Class I Divisions 1 and 2 Groups C and D.

Q: What mounting threads are available?

A: Option 03 includes two plugs, one 3/4-14 NPT fitting, and a reducer; option 02 is 3/4-14 NPT.

Q: Can I use this housing with a standoff adapter?

A: Yes, an optional standoff adapter is available, requiring mounting thread option 02.

Q: What certifications does this product hold?

A: It is CSA Type 4 rated, RoHS compliant, and meets API 670 standards.

Product Support and Availability

Petro Auto Tech stocks the 21000-00-00-00-00--03-02 as new and original in factory packing. It ships with a 12-month factory warranty. Contact Petro Auto Tech for current lifecycle status and availability before ordering.