Technical Specifications Breakdown
Key parameters for the 21000-34-05-20-028-04-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21000 - Proximity Probe Housing Assemblies |
| Probe Option | 34 = 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals |
| Probe Cable Length | 0.5 m (20 in) |
| Standoff Adapter | 2.0 in |
| Probe Penetration | 2.8 in |
| Fitting Option | One 3/4-14 NPT plug only |
| Mounting Thread Option | 3/4-14 NPT |
| Material | Aluminum body with 304 stainless steel sleeve |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
Industry Applications and Cost Impact
The 3300 XL 8 mm probe with connector protector reduces installation labor costs by enabling quick field replacement without rewiring. The CSA Type 4 enclosure rating eliminates the need for additional weatherproofing, saving on enclosure expenses. Compliance with API 670 standard ensures acceptance in critical asset monitoring programs, reducing the risk of costly regulatory non-compliance.

Installation and Setup Guidance
Mount the housing using the 3/4-14 NPT thread option. Ensure the standoff adapter is set to 2.0 in and probe penetration to 2.8 in for proper gap alignment. Use the included 3/4-14 NPT plug to seal unused conduit ports. For explosion-proof installations, order the appropriate CA version with E:00, E:01, E:02, or E:04 options. Always verify hazardous area compatibility before installation.
Maintenance and Reliability
Inspect the housing and O-rings annually for corrosion or wear. The aluminum body and 304 stainless steel sleeve provide resistance to corrosive atmospheres, extending service life and reducing replacement frequency. Replace the probe assembly if cable damage is visible.
Cost-Effective Protection for Critical Machinery
In industrial environments, unplanned downtime from vibration sensor failure can cost thousands per hour. The Bently Nevada 21000-34-05-20-028-04-02 proximity probe housing assembly provides a rugged, certified enclosure that protects sensitive probes while minimizing installation and maintenance costs. This assembly is engineered for long-term reliability in harsh conditions, reducing the total cost of ownership for your monitoring system.

Selection Guide and Purchasing Advice
When ordering the 21000-34-05-20-028-04-02, confirm that the probe cable length (0.5 m) and standoff adapter (2.0 in) match your installation requirements. Contact AutoDCSTech for assistance with suffix code customization or to verify current lifecycle status and availability. We stock new and original factory-packed units with full warranty.
Availability & Condition at AutoDCSTech
| Part Number | 21000-34-05-20-028-04-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
