Product Overview
The Bently Nevada 21000-28-05-15-012-04-02 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 3300 XL 8 mm proximity probes, ensuring accurate measurement in hazardous environments. With its aluminum body and 304 stainless steel sleeve, the 21000-28-05-15-012-04-02 delivers durability and corrosion resistance for long-term service.
This housing assembly is fully compliant with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings, making it a trusted choice for refineries, power plants, and other process industries. The 21000-28-05-15-012-04-02 includes a dome cover, threaded ports for conduit connections, a probe sleeve, O-rings, a reverse mount proximity probe, and a thread seal, providing a complete solution for your monitoring needs.
Key Features & Technical Specifications
The 21000-28-05-15-012-04-02 comes with a comprehensive set of specifications that ensure optimal performance:
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Probe Option: 3300 XL 8 mm probe with connector (selectable hazardous area approvals)
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Probe Cable Length: 0.5 m (20 in)
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Standoff Adapter: 1.5 in (38 mm)
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Probe Penetration: 1.2 in
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Fitting Option: One 3/4-14 NPT plug only
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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 mm) with visible probe (P/N and S/N)
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Weight: 1.1 kg (2.4 lb) typical, without fittings
Certifications & Compliance
This housing assembly is CSA certified for explosion-proof applications in hazardous areas, rated for Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, and G, and Class III. It meets Enclosure Type 4 requirements and is suitable for operation at T5 @ Ta = -50°C to +40°C and T4 @ Ta = -50°C to +80°C. The circuit is non-incendive when connected per drawing 140979. Additionally, the 21000-28-05-15-012-04-02 complies with the RoHS Directive 2011/65/EU.
Applications & Use Cases
Ideal for monitoring shaft vibration and radial position in turbines, compressors, pumps, and generators, the 21000-28-05-15-012-04-02 ensures safe operation and predictive maintenance. Its explosion-proof design makes it suitable for chemical plants and oil refineries where flammable gases are present. The housing's compliance with API 670 also makes it a preferred choice for new installations and retrofits in the oil and gas industry.
Installation & Mounting Guidance
Proper installation is critical for accurate readings. Ensure the mounting thread (3/4-14 NPT) is clean and free of debris. Use a suitable thread sealant to prevent leaks. The standoff adapter must be correctly positioned to achieve the desired probe penetration of 1.2 inches. Always follow the manufacturer's wiring diagram (drawing 140979) for non-incendive connections.
Maintenance & Reliability
Regular inspection of the housing and probe is recommended to ensure long-term reliability. Check for any signs of corrosion or damage to the aluminum body or stainless steel sleeve. Verify that all O-rings are intact and replace them if worn. Keep the conduit connections tight to maintain the explosion-proof integrity. With proper care, the 21000-28-05-15-012-04-02 will provide years of dependable service.
Selection & Buying Guide
Before purchasing, verify that this model matches your existing system requirements. Confirm the probe cable length, standoff adapter length, and mounting thread options are correct for your application. As a reliable supplier, PLC Source PRO ensures that you receive a new, original product in factory packing with a 12-month warranty. For further assistance, contact our team to confirm compatibility.