Technical Specifications Breakdown
Key parameters for the 21000-34-05-20-039-03-02 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 | 05 = 0.5 m (20 in) |
| Standoff Adapter | 20 = 2.0 in |
| Probe Penetration | 039 = 3.9 in |
| Mounting Thread Option | -02 - 3/4-14 NPT |
| Material | 21000 Aluminum body with 304 stainless steel sleeve |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
| Maximum (C) + (D) Dimension | 13.5 in (34.3 cm) |
Installation and Setup Guidance
When installing the 21000-34-05-20-039-03-02, ensure the mounting thread (3/4-14 NPT) is properly sealed. The standoff adapter (2.0 in) positions the probe at the correct gap. The cable seal grip accommodates cable sizes from 1/8 to 3/8 inches. For hazardous area installations, follow all local electrical codes and the provided CSA certification guidelines.
Engineered for Hazardous Area Reliability
This housing assembly is designed for externally mounted proximity probes in accordance with API 670 Standard. The aluminum body with 304 stainless steel sleeve provides corrosion resistance and mechanical strength. The assembly includes a dome cover, threaded conduit ports, a probe sleeve, O-rings, a reverse mount proximity probe, thread seal, and optional conduit fittings. The selectable hazardous area approvals allow deployment in explosion-proof and intrinsically safe applications.

Maintenance and Reliability
The housing assembly requires periodic inspection of O-rings and seals to maintain the CSA Type 4 enclosure rating. Check cable integrity and connector tightness. The 304 stainless steel sleeve resists wear in high-vibration environments. No disassembly of the probe or housing is recommended beyond routine visual checks.
Robust Protection for Critical Machinery Monitoring
In rotating machinery monitoring, maintaining reliable proximity probe positioning in hazardous environments is a persistent engineering challenge. The Bently Nevada 21000-34-05-20-039-03-02 proximity probe housing assembly provides a rugged, explosion-proof solution for securing 3300 XL 8 mm probes in demanding industrial settings.

Selection Guide and Purchasing Advice
For applications requiring a rugged, CSA-approved proximity probe housing with a 0.5 m cable and 2.0 in standoff, the 21000-34-05-20-039-03-02 is a reliable choice. AutoDCSTech stocks this unit as new and original in factory packing with a 12-month warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 21000-34-05-20-039-03-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
