Product Overview
The Bently Nevada 21000-28-05-00-030-04-02 is a precision-engineered proximity probe housing assembly designed for reliable vibration monitoring in critical rotating machinery. Part of the 21000 series, this industrial automation module provides a robust, explosion-proof enclosure for 3300 XL 8 mm proximity probes, ensuring accurate measurement in the harshest industrial environments.
Constructed with an aluminum body and a 304 stainless steel sleeve, the 21000-28-05-00-030-04-02 offers exceptional durability and corrosion resistance. It is CSA certified for explosive atmospheres, making it suitable for hazardous areas in oil & gas, petrochemical, and power generation facilities.
Key Specifications
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Probe Option: 3300 XL 8 mm with connector, selectable hazardous area approvals
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Probe Cable Length: 0.5 m (20 in)
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Standoff Adapter: None
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Probe Penetration: 3 in
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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 Dimension (C+D): 13.5 in (34.3 mm) – probe label not visible
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Weight: 1.1 kg (2.4 lb) typical, without fittings
Industry Applications
This Bently Nevada 21000-28-05-00-030-04-02 housing assembly is ideal for externally mounted proximity probes on compressors, turbines, pumps, and motors. Its explosion-proof design meets Class I Divisions 1 and 2, Groups C and D, and Class II Divisions 1 and 2, Groups E, F, and G, ensuring safe operation in volatile environments.
In a typical application, the 21000-28-05-00-030-04-02 protects the probe from physical damage and environmental contaminants while maintaining accurate shaft vibration and position readings. The 3/4-14 NPT mounting thread simplifies installation into existing machine casings.
Installation & Setup
For optimal performance, follow these installation guidelines:
- Verify the mounting thread (3/4-14 NPT) matches the machine port before installation.
- Ensure the probe cable length (0.5 m) is sufficient for routing to the junction box without stress.
- Install the housing with the provided NPT plug to maintain the explosion-proof seal.
- Torque the housing to the manufacturer's recommended value to avoid thread damage.
- Confirm the probe tip gap (not specified) using the standard calibration procedure for 3300 XL probes.
Maintenance & Reliability
Routine inspection of the 21000-28-05-00-030-04-02 should include checking for loose fittings, corrosion on the aluminum body, and the integrity of the O-rings. The stainless steel sleeve resists wear, but periodic cleaning of the probe tip is recommended to ensure accurate measurements.
With proper care, this housing assembly provides long service life, reducing downtime and maintenance costs. Its compliance with API 670 ensures reliability in critical machinery protection systems.
Compatibility & Integration
The 21000-28-05-00-030-04-02 is designed for use with Bently Nevada 3300 XL 8 mm proximity probes and compatible monitors. It integrates seamlessly with existing vibration monitoring systems, including those using the 3500 series rack. No special adapters are required when ordered with the standard 3/4-14 NPT thread.
Selection Guide
Before purchasing, verify the following:
- Probe cable length: 0.5 m (20 in) – ensure it meets your routing needs.
- Probe penetration: 3 in – confirm it suits your machine's internal clearance.
- Fitting option: One 3/4-14 NPT plug – check if additional conduit fittings are required.
- Mounting thread: 3/4-14 NPT – matches the machine port.
- Hazardous area approval: CSA Type 4, T5/T4 – confirm compatibility with your area classification.
PLC Source PRO offers this genuine Bently Nevada 21000-28-05-00-030-04-02 in new, original factory packaging with a 12-month warranty. Contact our team for assistance with your specific application.