Product Overview
The Bently Nevada 21000-34-00-00-039-04-02 is a precision-engineered proximity probe housing assembly designed for reliable vibration and position monitoring in rotating machinery. This model combines a durable aluminum body with a 304 stainless steel sleeve, ensuring long-term performance in demanding industrial environments. With a probe penetration of 3.9 inches and a mounting thread of 3/4-14 NPT, it offers a secure, standardized fit for a wide range of applications.
This housing assembly is part of the 21000 series, widely recognized for its robust construction and compatibility with Bently Nevada's 3300 XL 8 mm proximity probe. The 21000-34-00-00-039-04-02 is supplied in new, original factory packing and includes a 12-month factory warranty, making it a dependable choice for maintenance, repair, and operations (MRO) teams.
Key Specifications
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Model: 21000-34-00-00-039-04-02
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Probe Type: 3300 XL 8 mm probe with connector protector
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Probe Cable: Not required (0.5 m cable length option)
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Standoff Adapter: None
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Probe Penetration: 3.9 in (99 mm)
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Fitting Option: One 3/4-14 NPT plug
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Mounting Thread: 3/4-14 NPT
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Material: Aluminum body with 304 stainless steel sleeve
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Maximum (C) + (D) Dimension: 13.5 in (34.3 cm)
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Weight: 1.1 kg (2.4 lb) typical, without fittings
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Approvals: CSA Type 4 enclosure, explosion-proof for hazardous areas (CA versions)
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Compliance: API 670 Standard for externally mounted proximity probe housings
Applications & Industries
The 21000-34-00-00-039-04-02 is engineered for use in critical rotating equipment across various sectors. Its explosion-proof rating and API 670 compliance make it ideal for:
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Oil & Gas: Monitoring compressors, pumps, and turbines in refineries and processing plants.
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Power Generation: Vibration monitoring on steam and gas turbines, generators, and auxiliary equipment.
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Manufacturing: Protecting large motors, gearboxes, and fans from unplanned downtime.
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Chemical Processing: Ensuring safe operation of agitators, blowers, and other rotating assets.
By providing accurate, real-time data on shaft vibration and position, this housing assembly helps maintenance teams detect early signs of mechanical issues, reducing costly failures and unplanned outages.
Installation & Setup
Proper installation is critical to the performance of the 21000-34-00-00-039-04-02. Follow these guidelines for optimal results:
- Ensure the mounting thread (3/4-14 NPT) matches the machine's port. Use appropriate thread sealant to prevent leaks.
- When installing the probe, verify that the probe tip is correctly positioned relative to the shaft. Use the specified penetration depth (3.9 in) as a reference, but always consult the machine's OEM documentation for exact clearance requirements.
- If a standoff adapter is not used (as in this model), confirm that the probe cable routing does not interfere with rotating parts.
- For hazardous area installations, ensure that the housing is properly grounded and that all connections meet local electrical codes.
Maintenance & Reliability
Routine inspection of the housing assembly ensures long-term reliability. Check the dome cover and O-rings for wear or damage, and verify that all threaded connections remain tight. The aluminum body with stainless steel sleeve resists corrosion, but in harsh environments, periodic cleaning is recommended. The absence of a probe cable simplifies maintenance, reducing potential failure points.
With proper care, the 21000-34-00-00-039-04-02 provides years of dependable service, minimizing downtime and extending the life of your rotating machinery.
Selection Guide
When ordering the Bently Nevada 21000-34-00-00-039-04-02, verify that the suffix codes match your requirements. This configuration includes a probe with connector, no probe cable, no standoff adapter, a 3.9-inch penetration, and a single 3/4-14 NPT plug. If your application requires a different cable length or fitting, consult the model number breakdown to configure the correct assembly.
For additional support or to confirm compatibility with your existing system, contact PLC Source PRO. We are a trusted supplier of industrial automation parts, offering genuine components with fast shipping and competitive pricing.