Technical Specifications Breakdown
Key parameters for the 21000-34-05-15-039-04-02 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 | 05 = 0.5 m (20 in) |
| Standoff Adapter | 15 = 1.5 in |
| 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 |
| Maximum (C) + (D) Dimension | 13.5 in (34.3 cm) |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
| Temperature Range (3300 XL 8mm Probe) | Operating and storage: -51°C to +177°C (-60°F to +351°F) |
Industry Applications for the 21000 Housing Assembly
This enclosure is purpose-built for external mounting on compressors, turbines, pumps, and fans in oil and gas, petrochemical, and power generation facilities. The 21000-34-05-15-039-04-02 configuration with a 0.5 m probe cable and 1.5 in standoff adapter suits tight clearance installations where space is limited. The CSA Type 4 enclosure rating and explosion-proof certification ensure compliance with API 670 standards, making it a reliable choice for upgrading legacy vibration monitoring systems.

Installation & Setup Guidance
Mount the housing using the 3/4-14 NPT thread option (mandatory when standoff adapter length is not -00). The assembly includes a dome cover, threaded ports for conduit connections, a probe sleeve, O-rings, a reverse mount proximity probe, and a thread seal. Ensure the probe penetration of 3.9 in is correctly set to achieve the proper gap voltage. For hazardous area installations, use only approved conduit fittings and follow local electrical codes. The connector protector on the 3300 XL 8 mm probe safeguards the connection during installation.
Maintenance & Reliability
Inspect the housing assembly periodically for signs of corrosion or damage, especially in harsh environments. The aluminum body with 304 stainless steel sleeve offers resistance to corrosion. Verify that O-rings and thread seals remain intact to maintain the CSA Type 4 enclosure integrity. The 3300 XL 8 mm probe operates reliably across -51°C to +177°C, suitable for most industrial settings. No internal disassembly is required for routine checks.
The Challenge of Reliable Vibration Monitoring in Hazardous Environments
How can you ensure accurate, continuous vibration monitoring without compromising safety? The Bently Nevada 21000-34-05-15-039-04-02 Proximity Probe Housing Assembly delivers a field-proven solution, combining a rugged aluminum body with a 304 stainless steel sleeve and a certified 3300 XL 8 mm probe for intrinsically safe applications.

Compatibility & Integration
The 21000 housing is designed to work with Bently Nevada 3300 XL series proximity probes and compatible monitors. The 0.5 m probe cable connects directly to extension cables or monitoring systems. The assembly is fully compliant with API 670 for externally mounted proximity probe housings, ensuring seamless integration into existing vibration monitoring architectures.
Selection Guide & Purchasing Advice
When ordering the 21000-34-05-15-039-04-02, confirm that the probe cable length (0.5 m), standoff adapter (1.5 in), and probe penetration (3.9 in) match your machine geometry. The 3/4-14 NPT mounting thread is included. AutoDCSTech stocks this assembly 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 | 21000-34-05-15-039-04-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
