Product Overview
The Bently Nevada 21000-28-00-30-018-03-02 is a rugged proximity probe housing assembly designed for reliable vibration monitoring in harsh industrial environments. This model combines an aluminum body with a 304 stainless steel sleeve, ensuring durability and corrosion resistance. It is part of the 21000 series, which is widely used for externally mounted proximity probes in rotating machinery protection systems.
This assembly includes a 3300 XL 8 mm probe with selectable hazardous area approvals, a 3-inch standoff adapter, and a probe penetration of 1.8 inches. The fitting option provides one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for cable sizes ranging from 1/8 to 3/8 inches. The mounting thread is 3/4-14 NPT, making it compatible with standard industrial mounting configurations.
Technical Specifications
| Specification |
Detail |
| Model |
21000-28-00-30-018-03-02 |
| Probe Option |
3300 XL 8 mm probe, selectable hazardous area approvals |
| Standoff Adapter |
3 inches |
| Probe Penetration |
1.8 inches |
| Fitting Option |
One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, cable seal grip with grommets |
| Mounting Thread |
3/4-14 NPT |
| Material |
Aluminum body with 304 stainless steel sleeve |
| Weight |
1.1 kg (2.4 lb) typical, without fittings |
These specifications confirm the 21000-28-00-30-018-03-02 meets the rigorous demands of industrial applications, providing precise and stable mounting for proximity probes.
Industry Applications
The Bently Nevada 21000-28-00-30-018-03-02 is ideal for vibration monitoring on critical rotating equipment such as turbines, compressors, and pumps. Its explosion-proof design, certified for Class I Divisions 1 and 2 Groups C and D, makes it suitable for hazardous areas in oil and gas, petrochemical, and power generation facilities. The housing is CSA Type 4 certified and fully compliant with API 670, ensuring reliability in external mounting applications.
In a typical scenario, this housing assembly protects the probe from environmental damage while maintaining accurate measurement. Its robust construction minimizes downtime caused by sensor failure, contributing to overall operational efficiency.
Installation & Setup
When installing the 21000-28-00-30-018-03-02, ensure the mounting thread is clean and free of debris. Apply a suitable thread sealant to prevent leakage. The standoff adapter should be tightened to the recommended torque to avoid misalignment. For hazardous area installations, follow the wiring diagram (drawing 140979) to maintain non-incendive circuit integrity. Verify the probe penetration depth (1.8 inches) is set correctly before finalizing the assembly.
Maintenance & Reliability
Regular inspection of the housing assembly is recommended to check for loose fittings, corrosion, or damage to the cable seal. Replace worn grommets to maintain a proper seal. The aluminum and stainless steel construction offers excellent resistance to environmental stress, extending service life. By adhering to a routine maintenance schedule, you can prevent unexpected failures and reduce long-term replacement costs.
Selection Guide
Before purchasing, verify that the 21000-28-00-30-018-03-02 matches your probe requirements and mounting configuration. Confirm the standoff adapter length and probe penetration are suitable for your application. For assistance with compatibility or ordering, PLC Source PRO offers expert support to ensure you select the correct part.