Product Overview
The Bently Nevada 21000-34-00-20-066-04-02 is a precision-engineered proximity probe housing assembly designed for reliable vibration monitoring in critical rotating machinery. This Industrial Automation Module provides a robust, explosion-proof enclosure for a 3300 XL 8 mm probe, ensuring accurate measurement in demanding environments.
Built with an aluminum body and a 304 stainless steel sleeve, the 21000-34-00-20-066-04-02 is certified as a CSA Type 4 enclosure and fully complies with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings. This housing assembly is rated explosion-proof for hazardous areas, making it a dependable choice for oil & gas, power generation, and petrochemical facilities.
Technical Specifications
The table below outlines the key specifications for the Bently Nevada 21000-34-00-20-066-04-02:
| Parameter |
Value |
| Product Number |
21000-34-00-20-066-04-02 |
| Model |
21000 – Proximity Probe Housing Assemblies |
| Probe Option |
34 – 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals |
| Probe Cable Length |
00 – Probe cable not required |
| Standoff Adapter |
20 – 2.0 in |
| Probe Penetration |
066 – 6.6 in |
| Fitting Option |
04 – One 3/4-14 NPT plug only |
| Mounting Thread Option |
-02 – 3/4-14 NPT (must be ordered if standoff adapter length option is not -00) |
| Material |
Aluminum body with 304 stainless steel sleeve |
| Weight |
1.1 kg (2.4 lb) typical, without fittings |
The 21000-34-00-20-066-04-02 includes a dome cover, threaded ports for conduit connections, a probe sleeve, O-rings, a reverse mount proximity probe, a thread seal, and an optional standoff adapter. This complete assembly ensures straightforward installation and reliable performance.
Industry Applications
The Bently Nevada 21000-34-00-20-066-04-02 is ideal for continuous vibration monitoring on turbines, compressors, pumps, and other rotating equipment. Its CSA Type 4 rating and explosion-proof certification make it suitable for hazardous area installations, while API 670 compliance ensures it meets industry standards for external mounting.
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Oil & Gas: Monitor critical compressors and pumps in refineries and gas plants, ensuring safe operation in explosive atmospheres.
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Power Generation: Track turbine shaft vibration to prevent unplanned outages and extend machine life.
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Petrochemical: Provide reliable monitoring in chemical processing units where harsh conditions demand rugged hardware.
Installation & Setup Guidance
Proper installation is crucial for accurate measurements. When mounting the 21000-34-00-20-066-04-02, ensure the 3/4-14 NPT mounting thread is correctly seated. The standoff adapter (2.0 in) positions the probe at the correct distance from the shaft. Verify the probe penetration (6.6 in) matches the application requirements. Use the included thread seal to prevent leakage and maintain a secure fit. Always follow the manufacturer's guidelines for torque and alignment.
Maintenance & Reliability
Regular inspection of the housing assembly is recommended to ensure long-term reliability. Check the O-rings and thread seal for wear, and verify that all fittings remain tight. The aluminum body and 304 stainless steel sleeve offer excellent corrosion resistance, reducing maintenance frequency. By investing in a high-quality housing assembly like the 21000-34-00-20-066-04-02, you minimize downtime and extend the service life of your monitoring system.
Selection Guide & Purchasing Advice
Before ordering, confirm that the model number 21000-34-00-20-066-04-02 matches your system requirements. Verify the probe option (3300 XL 8 mm), cable length (not required), standoff adapter (2.0 in), penetration depth (6.6 in), and fitting option (one 3/4-14 NPT plug). Ensure your mounting thread is 3/4-14 NPT. PLC Source PRO offers this product as new, original factory-packed inventory with a 12-month warranty, ensuring you receive a genuine component for your critical application.