Technical Specifications Breakdown
Key parameters for the 21000-34-00-00-018-03-02 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 | 00 = Probe cable not required |
| Standoff Adapter | 00 = No Adapter |
| Probe Penetration | 018 = 1.8 in |
| Fitting Option | 03 = One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, one cable seal grip with grommets for 1/8 to 3/16 inches, 1/4 to 5/16 inches, 5/16 to 3/8 inches |
| 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 |
Application Versatility in Rotating Machinery
Maintenance teams rely on the 21000-34-00-00-018-03-02 for continuous vibration monitoring on compressors, turbines, pumps, and fans. The 1.8-inch probe penetration suits standard bearing housing depths.
Installation Guidance for Maintenance Engineers
During installation, ensure the probe sleeve is clean and the O-rings are properly seated. Torque the dome cover to manufacturer specifications (not provided here) to maintain the explosion-proof seal. Use the supplied cable seal grip with the correct grommet for your cable diameter to prevent moisture ingress. The reverse mount probe orientation simplifies alignment and reduces the risk of damage during assembly.
Engineered for Hazardous Area Reliability
This housing assembly is purpose-built for external mounting per API 670 Standard. The aluminum body with a 304 stainless steel sleeve resists corrosion and mechanical stress. The included fitting kit (one 3/4-14 NPT plug, one reducer, and a cable seal grip with three grommet sizes) allows quick adaptation to existing conduit systems. The 3/4-14 NPT mounting thread ensures a secure, leak-proof installation.

Maintenance and Reliability Best Practices
Periodically inspect the housing for signs of corrosion or mechanical damage, especially in harsh environments. Verify that the cable seal grip remains tight and the grommets are not degraded. The 304 stainless steel sleeve offers resistance to chemical exposure, but routine visual checks extend service life. No internal disassembly is required for routine maintenance.
Robust Protection for Critical Vibration Monitoring
In rotating machinery monitoring, the integrity of the proximity probe mounting is as vital as the sensor itself. The Bently Nevada 21000-34-00-00-018-03-02 proximity probe housing assembly provides a secure, explosion-proof enclosure for the 3300 XL 8 mm probe, ensuring reliable vibration and position measurements in the harshest industrial environments. Designed for maintenance engineers who demand durability and ease of service, this assembly simplifies installation while meeting stringent safety standards.

Compatibility and Integration
The 21000-34-00-00-018-03-02 is designed for use with Bently Nevada 3300 XL 8 mm proximity probes. The selectable hazardous area approvals allow use in intrinsically safe applications when paired with appropriate barriers. Always verify probe cable length requirements; this variant includes a 0.5 m probe cable.
Selection Guide and Purchasing Advice
When selecting a housing assembly, confirm the required probe penetration (1.8 in here) and mounting thread (3/4-14 NPT). The -02 mounting thread option is mandatory when the standoff adapter is not used. 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 | 21000-34-00-00-018-03-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
