Technical Specifications Breakdown
Key parameters for the 21000-34-10-00-066-03-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21000 Proximity Probe Housing Assemblies |
| Probe Option | 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals |
| Probe Cable Length | 1.0 m (39 in) |
| Probe Penetration | 6.6 in |
| Fitting Option | One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, cable seal grip with grommets |
| Mounting Thread Option | 3/4-14 NPT |
| Material | 21000 Aluminum body with 304 stainless steel sleeve |
| Maximum (C) + (D) Dimension | 32.9 in (83.5 cm) |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
| Enclosure Rating | CSA Type 4 |
Application in Hazardous Area Vibration Monitoring
This housing assembly is engineered for external mounting on compressors, pumps, and turbines where API 670 compliance is required. The 3300 XL 8 mm probe provides reliable shaft relative vibration measurement. The selectable hazardous area approvals allow use in explosive environments, while the CSA Type 4 enclosure ensures protection against water ingress and dust. The included fitting kit with NPT adapters simplifies conduit connections in tight spaces.

Installation Guidance for Reliable Performance
When installing the 21000-34-10-00-066-03-02, ensure the mounting thread (3/4-14 NPT) is properly sealed with thread sealant to maintain the explosion-proof rating. The probe penetration of 6.6 in must be verified against the target shaft diameter to achieve the correct gap voltage. Use the supplied cable seal grip with appropriate grommet size (1/8 to 3/8 inches) for the interconnecting cable. Avoid overtightening the dome cover to prevent O-ring damage.
Maintenance and Reliability Considerations
Periodically inspect the housing for signs of corrosion or damage, especially in harsh environments. The aluminum body with 304 stainless steel sleeve offers good corrosion resistance, but verify the O-rings remain pliable. No internal adjustments are required; focus on maintaining clean conduit seals and verifying probe cable integrity. The assembly does not contain user-serviceable parts.
Selecting the Right Vibration Monitoring Enclosure
When protecting critical rotating machinery, the housing assembly for your proximity probe is as vital as the probe itself. The Bently Nevada 21000-34-10-00-066-03-02 offers a robust solution for external mounting in demanding environments. This guide helps you evaluate its fit for your application based on key specifications.

Purchasing Guidance from AutoDCSTech
AutoDCSTech stocks the 21000-34-10-00-066-03-02 as new and original in factory packing with a 12-month warranty. Before ordering, verify the probe cable length (1.0 m) and probe penetration (6.6 in) match your installation requirements. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 21000-34-10-00-066-03-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
