Product Overview: Bently Nevada 21000-34-00-20-050-04-02
The Bently Nevada 21000-34-00-20-050-04-02 is a precision-engineered proximity probe housing assembly designed for reliable vibration monitoring in critical rotating machinery. This model, part of the 21000 series, provides a robust enclosure for a 3300 XL 8 mm probe with connector protector, ensuring accurate data collection in demanding industrial environments.
Constructed with an aluminum body and a 304 stainless steel sleeve, the 21000-34-00-20-050-04-02 offers excellent durability and corrosion resistance. It is certified as a CSA Type 4 enclosure and fully compliant with the American Petroleum Institute's (API) 670 Standard, making it suitable for hazardous area installations.
Technical Specifications
The Bently Nevada 21000-34-00-20-050-04-02 is available with the following key specifications:
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Probe Option: 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals
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Probe Cable Length: 1.0 m (probe cable not required – suffix 00)
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Standoff Adapter: 2 inches (suffix 20)
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Probe Penetration: 5 inches (suffix 050)
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Fitting Option: One 3/4-14 NPT plug only (suffix 04)
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Mounting Thread: 3/4-14 NPT (suffix -02)
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Material: Aluminum body with 304 stainless steel sleeve
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Maximum (C) + (D) with visible probe (P/N and S/N): 17.0 in (43.18 cm)
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Maximum (C) + (D) Dimension: 32.9 in (83.5 cm)
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Weight: 1.1 kg (2.4 lb) typical, without fittings
Industry Applications
The Bently Nevada 21000-34-00-20-050-04-02 is widely used in industries where machinery health monitoring is critical. Typical applications include:
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Oil & Gas: Monitoring compressors, turbines, and pumps in refineries and processing plants, where hazardous area approvals are essential.
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Power Generation: Vibration monitoring of steam and gas turbines, generators, and auxiliary equipment to prevent unplanned downtime.
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Manufacturing: Condition monitoring of large rotating equipment such as motors, fans, and gearboxes to optimize maintenance schedules.
By providing a secure and compliant housing for proximity probes, the 21000-34-00-20-050-04-02 ensures reliable data for predictive maintenance, reducing costly failures and extending asset life.
Installation & Setup Guidance
Proper installation of the 21000-34-00-20-050-04-02 is crucial for accurate measurements. Follow these guidelines:
- Mount the housing securely to the machine casing using the specified 3/4-14 NPT thread. Ensure the mounting surface is clean and flat.
- Adjust the probe penetration to 5 inches as specified, and verify the standoff adapter (2 inches) is correctly positioned.
- Use the 3/4-14 NPT plug for the unused port to maintain enclosure integrity.
- Route the probe cable (1.0 m) through the conduit connections, avoiding sharp bends or stress points.
- After installation, verify the probe gap and output voltage according to the system's calibration procedure.
Maintenance & Reliability
The Bently Nevada 21000-34-00-20-050-04-02 is designed for long-term reliability with minimal maintenance. However, regular inspection is recommended:
- Periodically check the housing for signs of corrosion or physical damage, especially in harsh environments.
- Inspect the O-rings and thread seal during routine maintenance to prevent moisture ingress.
- Verify that all fittings and plugs remain tight to maintain the explosion-proof rating.
- Keep the probe tip clean and free of debris to ensure accurate readings.
With proper care, this housing assembly provides years of dependable service, reducing total cost of ownership.
Selection Guide & Purchasing Advice
When selecting the Bently Nevada 21000-34-00-20-050-04-02, consider your specific application requirements:
- Verify the probe length and cable length match your installation needs.
- Confirm the hazardous area classification of your site and select the appropriate approvals.
- Check the mounting thread compatibility with your existing equipment.
PLC Source PRO offers this new, original product with a 12-month factory warranty. Our team can assist with any technical questions to ensure you choose the right part for your system.