Technical Specifications Breakdown
Key parameters for the 21000-34-00-20-030-04-02 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 | 00 = Probe cable not required |
| Standoff Adapter | 20 = 2 in |
| Probe Penetration | 030 = 3 in |
| Fitting Option | 04 = One 3/4-14 NPT plug only |
| Mounting Thread Option | -02 - 3/4-14 NPT |
| Material | 21000 Aluminum body with 304 stainless steel sleeve |
| Probe Cable Length | 1.0 m |
| Maximum (C) + (D) with visible probe (P/N and S/N) | 17.0 in (43.18 cm) |
| Maximum (C) + (D) Dimension | 32.9 in (83.5 cm) |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
Industry Applications
The explosion-proof design (CSA rated) allows installation in Class I hazardous areas. The 2-inch standoff adapter and 3-inch probe penetration accommodate standard mounting configurations, ensuring reliable shaft displacement measurements.

Installation & Setup Guidance
Mount the housing securely using the 3/4-14 NPT thread. Ensure the probe tip is properly positioned per manufacturer guidelines. The assembly includes a dome cover, threaded ports for conduit, and O-rings for environmental sealing. Use the provided thread seal to prevent leakage. Verify the probe cable length (1.0 m) is sufficient for routing to the monitor.
Maintenance & Reliability
Inspect the housing periodically for corrosion or damage, especially in harsh environments. The aluminum body with 304 stainless steel sleeve offers durability. Check O-rings and seals during routine maintenance to maintain the CSA Type 4 enclosure rating. No internal adjustments are required.
Robust Protection for Critical Vibration Monitoring
Industrial rotating machinery demands precise, uninterrupted vibration monitoring. The Bently Nevada 21000-34-00-20-030-04-02 Proximity Probe Housing Assembly provides a rugged, certified enclosure for proximity probes in hazardous environments. This assembly safeguards the sensor while maintaining measurement accuracy, reducing unplanned downtime and maintenance costs.

Selection Guide & Purchasing Advice
When ordering, confirm that the suffix codes match your application requirements. The 21000-34-00-20-030-04-02 includes a 3300 XL 8 mm probe with connector protector, 2-inch standoff, and 3-inch penetration. For assistance, contact AutoDCSTech to verify lifecycle status and availability. We stock new, original factory-packed units with a 12-month warranty.
Availability & Condition at AutoDCSTech
| Part Number | 21000-34-00-20-030-04-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
