Technical Specifications Breakdown
Key parameters for the 21000-34-00-30-050-03-02 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 | 30 = 3.0 in |
| Probe Penetration | 050 = 5.0 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 cable sizes 1/8 to 3/16, 1/4 to 5/16, 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 | 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
This housing assembly is commonly used in turbomachinery monitoring systems for steam turbines, compressors, and pumps. The 3300 XL 8 mm probe with connector protector enables reliable shaft vibration and position measurements in hazardous areas. The CSA Type 4 enclosure rating and explosion-proof certification make it suitable for oil and gas, petrochemical, and power generation facilities where safety and uptime are critical.

Installation & Setup Guidance
When installing the 21000-34-00-30-050-03-02, ensure the mounting thread (3/4-14 NPT) is properly sealed using the provided thread seal. The standoff adapter of 3.0 in must be used to position the probe at the correct distance from the shaft. The probe penetration of 5.0 in determines how far the probe extends into the housing. Use the supplied cable seal grip with the appropriate grommet for your cable diameter to maintain the enclosure seal. Always verify that the probe cable length of 1.0 m is sufficient for your routing path.
Maintenance & Reliability
Periodically inspect the dome cover, O-rings, and conduit fittings for signs of wear or corrosion. The aluminum body with 304 stainless steel sleeve offers good corrosion resistance, but in aggressive environments, more frequent checks are recommended. Ensure that all NPT fittings remain tight and that the cable seal grip is not damaged. No internal disassembly is required for routine maintenance.
Robust Protection for Critical Vibration Monitoring
In rotating machinery monitoring, the integrity of the probe mounting directly affects measurement accuracy. The Bently Nevada 21000-34-00-30-050-03-02 proximity probe housing assembly provides a rugged, sealed enclosure for the 3300 XL 8 mm probe, ensuring reliable operation in demanding industrial environments. This assembly is designed for externally mounted proximity probes and meets API 670 standards for vibration monitoring systems.

Compatibility & Integration
This housing assembly is designed specifically for Bently Nevada 3300 XL 8 mm proximity probes with connector protector. It is compatible with Bently Nevada monitoring systems that accept standard proximity probe inputs. The assembly is certified as CSA Type 4 enclosure and fully compliant with API 670 standard for externally mounted proximity probe housings.
Selection Guide & Purchasing Advice
When ordering the 21000-34-00-30-050-03-02, verify that the standoff adapter length (3.0 in) and probe penetration (5.0 in) match your machine's requirements. The mounting thread option -02 (3/4-14 NPT) is mandatory unless the standoff adapter length option is -00. AutoDCSTech stocks this assembly as new 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 | 21000-34-00-30-050-03-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
