Bently Nevada 21000-34-00-20-095-03-02 Proximity Probe Housing Assembly

Evaluating the Bently Nevada 21000-34-00-20-095-03-02 for Your Machinery Protection Needs

When selecting a proximity probe housing assembly for critical rotating machinery, the Bently Nevada 21000-34-00-20-095-03-02 offers a robust solution. This assembly is designed for externally mounted proximity probes, providing a protective enclosure that meets API 670 standards. Understanding its specifications and configuration options helps you determine if it fits your application.

What This Assembly Includes

The 21000-34-00-20-095-03-02 is a complete housing assembly that contains a dome cover, threaded ports for conduit connections, a probe sleeve, O-rings, a reverse mount proximity probe, a thread seal, and optional conduit fittings. The suffix codes define the exact configuration: the "34" indicates a 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals; "00" means no probe cable is required; "20" specifies a 2.0 in standoff adapter; "095" denotes 9.5 in probe penetration; and "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 of 1/8 to 3/16 inches, 1/4 to 5/16 inches, and 5/16 to 3/8 inches. The mounting thread option is 3/4-14 NPT.

Technical Specifications Breakdown

Key parameters for the 21000-34-00-20-095-03-02 are listed below for quick reference:

Industry Applications

The CSA Type 4 enclosure rating and explosion-proof certification make it suitable for hazardous areas where flammable gases or dusts are present. The 3300 XL 8 mm probe provides reliable shaft displacement and eccentricity measurements, helping operators detect early signs of bearing wear or rotor instability.

Installation and Setup Guidance

When installing the 21000-34-00-20-095-03-02, ensure the mounting surface is clean and flat to maintain proper seal integrity. The 3/4-14 NPT mounting thread requires compatible conduit connections. Use the provided cable seal grip with the appropriate grommet for your cable diameter (1/8 to 3/16, 1/4 to 5/16, or 5/16 to 3/8 inches) to maintain the hazardous area rating. The standoff adapter of 2.0 in positions the probe at the correct distance from the shaft. Verify the probe penetration of 9.5 in matches your installation depth requirements.

Maintenance and Reliability

Periodically inspect the housing for signs of corrosion or damage, especially in harsh environments. The aluminum body with 304 stainless steel sleeve offers good resistance to many industrial atmospheres. Check the O-rings and thread seal during routine maintenance to ensure the enclosure remains weathertight. The CSA Type 4 rating means it is protected against splashing water and dust ingress, but regular visual inspections help maintain long-term reliability.

Selection Guide and Purchasing Advice

When ordering the 21000-34-00-20-095-03-02, confirm that the probe cable length (1.0 m) and standoff adapter (2.0 in) match your application. If a different probe cable length is needed, consider a different suffix code. The hazardous area approvals are selectable, so verify that the specific approval required for your site is included. AutoDCSTech stocks this assembly as new and original in factory packing with a 12-month warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.