Technical Specifications Breakdown
Key parameters for the 21000-34-00-30-050-04-02 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 | 30 = 3.0 in |
| Probe Penetration | 050 = 5.0 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) 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 3.0-inch standoff adapter and 5.0-inch probe penetration allow precise positioning in tight clearances. The CSA Type 4 explosion-proof rating (when ordered with appropriate options) makes it suitable for hazardous areas where flammable gases or vapors may be present. By using the 21000-34-00-30-050-04-02, engineers reduce the risk of probe damage and signal degradation, leading to fewer false trips and improved machine availability.

Installation & Setup Guidance
Mount the housing using the 3/4-14 NPT threaded port. Ensure the standoff adapter is correctly torqued to maintain the 3.0-inch gap. The probe cable is not required with this suffix; the integrated connector protector simplifies wiring. Always follow API 670 guidelines for externally mounted proximity probe housings. Verify that the selected hazardous area approval matches the site classification before installation.
Maintenance & Reliability
The aluminum body with 304 stainless steel sleeve resists corrosion in demanding environments. Inspect O-rings and thread seals periodically for wear. The dome cover screws securely to prevent moisture ingress. For long-term reliability, replace the entire assembly if the probe sleeve shows signs of mechanical damage. No internal adjustments are needed; the unit is designed for minimal maintenance.
Robust Protection for Critical Vibration Monitoring
For maintenance engineers overseeing rotating machinery, reliable vibration data is non-negotiable. The Bently Nevada 21000-34-00-30-050-04-02 proximity probe housing assembly provides a rugged, explosion-proof enclosure designed to protect sensitive 3300 XL 8 mm probes in harsh industrial environments. This assembly ensures consistent, accurate measurements while simplifying installation and reducing long-term maintenance costs.

Compatibility & Integration
This assembly is fully compliant with the American Petroleum Institute's API 670 Standard. It accepts 3300 XL 8 mm proximity probes with connector protectors. The housing works with Bently Nevada monitoring systems and third-party vibration monitors that accept standard proximity probe signals. The 3/4-14 NPT mounting thread ensures compatibility with common conduit fittings.
Selection Guide & Purchasing Advice
When ordering, confirm that the suffix codes match your installation requirements. The 21000-34-00-30-050-04-02 is a new, original factory-packed unit with a 12-month warranty from AutoDCSTech. For obsolete or hard-to-find parts, contact our team to verify lifecycle status and availability. AutoDCSTech stocks a wide range of Bently Nevada components to support your predictive maintenance program.
Availability & Condition at AutoDCSTech
| Part Number | 21000-34-00-30-050-04-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
