Bently Nevada 21000-16-10-20-083-03-02 Proximity Probe Housing Assembly

Technical Specifications Breakdown

Key parameters for the 21000-16-10-20-083-03-02 are listed below for quick reference:

Industry Applications

Turbine and Compressor Protection

In steam turbines and centrifugal compressors, the 21000-16-10-20-083-03-02 housing assembly mounts externally to monitor shaft radial vibration and axial position. The 2 in standoff adapter and 8.3 in probe penetration allow precise positioning within the machine case, while the 3/4-14 NPT mounting thread ensures a secure, leak-proof installation. The CSA explosion-proof rating makes it suitable for hazardous areas where flammable gases or dusts are present.

Pump and Motor Monitoring

For large pumps and electric motors, this assembly provides a stable, repeatable mounting solution for the 3300 XL 8 mm probe. The 1.0 m cable length offers flexibility in routing to the proximitor, and the included fittings (plug, reducer, cable seal grip) simplify conduit connections. The aluminum body with 304 stainless steel sleeve resists corrosion in wet or chemically aggressive environments.

Installation and Setup Guidance

When mounting the 21000-16-10-20-083-03-02, ensure the probe penetration (C plus D dimension) does not exceed 300 mm (12 in) without adding sleeve support to prevent resonance. For probe penetration lengths between 1.0 and 2.0 inches, counter boring the machine case may be necessary to reduce side view or rear view effects. The adjustment range of probe penetration option D is 13 mm (± 0.5 in). Use the provided 3/4-14 NPT plug and reducer to seal unused ports, and select the appropriate grommet from the cable seal grip kit based on cable diameter (1/8 to 3/16 inches, 1/4 to 5/16 inches, or 5/16 to 3/8 inches).

Maintenance and Reliability

Periodically inspect the housing assembly for signs of corrosion, loose fittings, or damage to the probe cable. Verify that the dome cover is securely tightened and that O-rings remain intact to maintain the explosion-proof seal. The 304 stainless steel sleeve and aluminum body offer resistance to environmental stress, but regular visual checks in high-temperature or corrosive areas are recommended. The assembly is designed for long-term, maintenance-free operation under normal conditions.

Robust Protection for Critical Vibration Monitoring

Industrial rotating machinery demands reliable, continuous vibration monitoring to prevent catastrophic failures. The Bently Nevada 21000-16-10-20-083-03-02 Proximity Probe Housing Assembly provides a rugged, explosion-proof enclosure for the 3300 XL 8 mm proximity probe, ensuring accurate shaft displacement measurements in the harshest environments. This assembly is engineered to meet API 670 standards, delivering the durability and precision required for compressor, turbine, and pump protection systems.

Compatibility and Integration

The 21000-16-10-20-083-03-02 is part of the Bently Nevada 21000 series of proximity probe housing assemblies. It is compatible with the 3300 XL 8 mm probe and works with Bently Nevada monitoring systems such as the 3500 and 3300 racks. The CSA Type 4 enclosure rating ensures protection against dust and water ingress, making it suitable for outdoor or washdown areas. The assembly is fully compliant with API 670 for externally mounted proximity probe housings.

Selection Guide and Purchasing Advice

Choosing the correct housing assembly is critical for reliable vibration monitoring. The 21000-16-10-20-083-03-02 is configured with a 3300 XL 8 mm probe, 1.0 m cable, 2 in standoff adapter, and 8.3 in probe penetration. Verify that these dimensions match your machine's requirements before ordering. AutoDCSTech stocks this assembly as new and original in factory packing, backed by a 12-month warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.

Troubleshooting and Common Issues

If the proximity probe signal is erratic, check for loose connections at the housing or proximitor. Ensure the probe tip is clean and free of debris. If the assembly is installed in a high-vibration area, verify that the mounting thread (3/4-14 NPT) is properly torqued and that the standoff adapter is secure. For probe penetration lengths greater than 300 mm (12 in), confirm that sleeve support has been added to prevent resonance. If the cable seal grip is not sealing properly, replace the grommet with the correct size for your cable.