Technical Specifications Breakdown
Key parameters for the 21000-34-00-00-039-04-02 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 | 00 = No Adapter |
| Probe Penetration | 039 = 3.9 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 | 0.5 m |
| Maximum (C) + (D) Dimension | 13.5 in (34.3 cm) |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
Industry Applications for Optimal Vibration Monitoring
Its 3300 XL 8 mm probe provides precise displacement measurements, while the CSA Type 4 enclosure and explosion-proof rating (with appropriate options) make it suitable for oil and gas refineries, chemical plants, and power generation facilities. By using this housing assembly, maintenance teams can detect early bearing wear or imbalance, avoiding costly unplanned downtime.

Installation & Setup Guidance
Mount the housing using the 3/4-14 NPT thread option. Ensure the probe penetration of 3.9 in aligns with the target shaft clearance. The assembly includes a dome cover, threaded ports for conduit, and O-rings for environmental sealing. Use the provided thread seal and optional conduit fittings as needed. For hazardous areas, verify that the housing is ordered with the correct explosion-proof options (E:00, E:01, E:02, or E:04) to maintain CSA certification.
Maintenance & Reliability
Inspect the housing assembly periodically for signs of corrosion or mechanical damage. The aluminum body with 304 stainless steel sleeve resists many industrial chemicals. Replace O-rings if leakage is detected. The reverse mount proximity probe is factory-sealed; do not attempt to disassemble it. Regular calibration checks of the probe system ensure measurement accuracy.
Selection Guide & Purchasing Advice
When ordering the 21000-34-00-00-039-04-02, confirm that the probe cable length (0.5 m) meets your installation requirements. If a standoff adapter is needed, select the appropriate suffix code. AutoDCSTech stocks this assembly as new and original in factory packing, backed by a 12-month warranty. Contact our team to verify current lifecycle status and availability before placing an order.
Competitive Comparison: Why the Bently Nevada 21000-34-00-00-039-04-02 Stands Out
When selecting a proximity probe housing assembly for critical rotating machinery, engineers demand reliability, safety, and precision. The Bently Nevada 21000-34-00-00-039-04-02 offers a proven solution that meets API 670 standards for externally mounted housings. Unlike generic alternatives, this assembly integrates a 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals, and a durable aluminum body with 304 stainless steel sleeve. Its 3.9 in probe penetration and 3/4-14 NPT mounting thread ensure secure installation in tight industrial spaces. For operations prioritizing uptime and compliance, this housing assembly reduces failure risks associated with vibration monitoring in harsh environments.

Availability & Condition at AutoDCSTech
| Part Number | 21000-34-00-00-039-04-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
