Overview
For maintenance engineers working in critical rotating machinery protection, the Bently Nevada 21000-34-00-15-050-04-02 proximity probe housing assembly offers a robust solution for reliable vibration and position monitoring. This component integrates a 3300 XL 8 mm probe with connector protector, housed in an aluminum body with a 304 stainless steel sleeve, ensuring durability in harsh industrial environments. The assembly is rated explosion proof for hazardous areas and complies with CSA Type 4 enclosure standards, making it suitable for applications requiring intrinsic safety.

Technical Specifications Breakdown
Key parameters for the 21000-34-00-15-050-04-02 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 | 15 = 1.5 in |
| Probe Penetration | 050 = 5 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 1.5 in standoff adapter and 5 in probe penetration allow precise positioning near bearing housings, while the 3/4-14 NPT mounting thread simplifies installation into existing conduit systems. The CSA Type 4 enclosure ensures protection against dust and water ingress, reducing the risk of false readings in outdoor compressor stations.

Installation & Setup Guidance
When installing the 21000-34-00-15-050-04-02, ensure the mounting surface is clean and flat. Use the provided 3/4-14 NPT plug for unused conduit ports to maintain the explosion-proof seal. The probe cable length of 1.0 m should be routed away from high-voltage lines to avoid electromagnetic interference. Verify that the visible probe part number and serial number are accessible for future inspection.
Maintenance & Reliability
Regularly inspect the aluminum body and stainless steel sleeve for signs of corrosion or mechanical damage. Check the O-rings and thread seal during each scheduled outage to maintain the hazardous area rating. The assembly's robust construction minimizes drift, but periodic calibration of the connected proximity probe is recommended per API 670 guidelines.
Compatibility & Integration
This housing assembly is designed for use with Bently Nevada 3300 XL 8 mm proximity probes and compatible monitoring systems. The 3/4-14 NPT mounting thread allows direct integration into standard conduit runs. The selectable hazardous area approvals make it suitable for Class I, Division 1 environments when paired with appropriate barriers.
Selection Guide & Purchasing Advice
When selecting a replacement or new installation, verify that the standoff adapter length (1.5 in) and probe penetration (5 in) match your machine's geometry. AutoDCSTech stocks this Bently Nevada assembly as new and original in factory packing, backed by a 12-month warranty. Contact our team for assistance with lifecycle status and availability.
Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 21000-34-00-15-050-04-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
