Bently Nevada 21000 Series Proximity Probe Housing Assemblies – 21000-16-05-00-096-00-02

Technical Dossier

Product Details And Specifications

Bently Nevada 21000 Series Technical Notes

The Bently Nevada 21000 Series Proximity Probe Housing Assemblies represent a foundational component class within the 3300 and 7200 Series vibration monitoring ecosystems. Deployed across heavy industrial sectors — including petrochemical refineries, nuclear power stations, offshore platforms, and rotating machinery installations — these housing assemblies provide the mechanical interface between eddy-current proximity probes and the monitored machine casing. The 21000 Series is engineered to maintain precise probe-to-target gap geometry under sustained thermal cycling, high-vibration environments, and chemically aggressive atmospheres. Installation bases span turbine generators, compressor trains, pump sets, and gearboxes where continuous shaft displacement monitoring is a regulatory and operational requirement.

The Evolution of 21000 Series Architecture

The 21000 Series was introduced as a standardized mechanical housing platform to complement Bently Nevada's eddy-current probe product lines, initially supporting the 3300 XL 8mm and 11mm probe families. Early configurations used single-piece stainless steel bodies with fixed thread engagement lengths, designed for direct weld-pad or tapped-boss mounting on bearing housings. As industrial installations migrated toward higher-temperature and higher-pressure environments, the series expanded to include armored cable variants, extended-reach bodies, and dual-probe configurations for redundant measurement channels.

Compatibility with the 3300 Series monitors (3300/16, 3300/20, 3300/25, 3300/55) and the 7200 Series rack systems established the 21000 housing as a long-lifecycle component. The series accommodates both 5-meter and 9-meter extension cable assemblies, and probe tip diameters of 5mm, 8mm, and 11mm. As the 3500 Series machinery protection system became the dominant platform, 21000 housings retained backward compatibility, ensuring that existing mechanical installations could be retained during monitor upgrades. The series is now in a mature/end-of-active-production phase; Bently Nevada (a Baker Hughes company) no longer lists all sub-configurations as standard catalog items, making third-party lifecycle support and spare parts sourcing critical for ongoing plant maintenance programs.

21000 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified configurations within the Bently Nevada 21000 Proximity Probe Housing Assembly series, organized by functional sub-category:

Standard Housing Assemblies (Fixed Mount)

21000-16-05-00-096-00-02: 16mm body, 5m cable, standard thread, 96-inch extension, configuration 02
21000-16-05-10-096-00-02: 16mm body, 5m cable, armored jacket, 96-inch extension, configuration 02
21000-16-09-00-096-00-02: 16mm body, 9m cable, standard thread, 96-inch extension, configuration 02
21000-16-09-10-096-00-02: 16mm body, 9m cable, armored jacket, 96-inch extension, configuration 02

Extended-Reach Housing Assemblies

21000-16-05-00-180-00-02: 16mm body, 5m cable, 180-inch extension, standard configuration
21000-16-09-00-180-00-02: 16mm body, 9m cable, 180-inch extension, standard configuration
21000-16-05-00-240-00-02: 16mm body, 5m cable, 240-inch extension, long-reach variant
21000-16-09-00-240-00-02: 16mm body, 9m cable, 240-inch extension, long-reach variant

High-Temperature Housing Assemblies

21000-16-05-00-096-01-02: 16mm body, 5m cable, high-temp rated, 96-inch extension
21000-16-09-00-096-01-02: 16mm body, 9m cable, high-temp rated, 96-inch extension
21000-16-05-10-096-01-02: 16mm body, 5m cable, armored + high-temp, 96-inch extension

Dual-Probe / Redundant Configurations

21000-16-05-00-096-00-04: Dual-probe housing, 5m cable, 96-inch extension, configuration 04
21000-16-09-00-096-00-04: Dual-probe housing, 9m cable, 96-inch extension, configuration 04
21000-16-05-10-096-00-04: Dual-probe housing, armored cable, 5m, 96-inch extension

Compact / Short-Body Variants

21000-08-05-00-096-00-02: 8mm body diameter, 5m cable, 96-inch extension, standard thread
21000-08-09-00-096-00-02: 8mm body diameter, 9m cable, 96-inch extension, standard thread
21000-11-05-00-096-00-02: 11mm body diameter, 5m cable, 96-inch extension, standard thread

Quality Control for the 21000 Series Range

Proximity probe housing assemblies present specific quality verification challenges distinct from electronic modules. The critical parameters are mechanical: thread engagement integrity, body concentricity, cable jacket condition, connector pin continuity, and probe tip recess depth. DriveKNMS applies the following inspection protocol to all 21000 Series units processed through our facility:

Thread gauging is performed on all male and female thread interfaces using calibrated go/no-go gauges to verify dimensional conformance. Body concentricity is checked against the probe bore axis to confirm that probe tip positioning will meet the ±0.001-inch tolerance required for accurate gap calibration. Cable jacket inspection covers the full cable run for abrasion, kinking, crush damage, and connector seating integrity. Electrical continuity and insulation resistance testing is performed on the coaxial cable assembly from connector to probe tip. For armored cable variants, armor braid continuity and termination integrity are verified separately. All units are tagged with inspection date, technician ID, and test result summary prior to shipment.