Technical Specifications Breakdown
Key parameters for the 21000-34-00-20-028-04-02 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 | 20 = 2.0 in |
| Probe Penetration | 028 = 2.8 in |
| Fitting Option | 04 = One 3/4-14 NPT plug only |
| Mounting Thread Option | -02 - 3/4-14 NPT (Must be ordered if Standoff Adapter Length Option is not -00) |
| 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 for Vibration Monitoring
The 3300 XL 8 mm probe provides precise proximity measurements, while the CSA Type 4 enclosure ensures operation in wet or dusty environments. The 2.0 in standoff adapter and 2.8 in penetration allow flexible installation in tight machine casings.
Installation & Setup Guidance
Mount the housing using the 3/4-14 NPT thread option. Ensure the probe tip is positioned at the correct gap voltage per Bently Nevada guidelines. The 1.0 m probe cable connects directly to a compatible proximitor. For hazardous areas, verify that the selected probe option matches the area classification. Use the included 3/4-14 NPT plug for unused conduit ports to maintain enclosure integrity.
Maintenance & Reliability
Inspect the housing and probe cable periodically for physical damage. Clean the dome cover and sleeve with a soft cloth. Check O-rings for wear during routine shutdowns. The aluminum body resists corrosion, but verify that the 304 stainless steel sleeve is free from pitting in aggressive environments.
Failure Mode Analysis & Prevention: The Engineering Challenge
In rotating machinery, unplanned downtime often originates from undetected shaft vibration or misalignment. A single bearing failure in a critical compressor can halt production for days. The Bently Nevada 21000-34-00-20-028-04-02 Proximity Probe Housing Assembly provides a robust solution for continuous, non-contact vibration monitoring in hazardous environments. This assembly integrates a 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals, and a durable aluminum body with 304 stainless steel sleeve.
Compatibility & Integration
The 21000 assembly is fully compliant with API 670 Standard for externally mounted proximity probe housings. It integrates with Bently Nevada 3500 and 3300 monitoring systems. The CSA explosion-proof rating applies when ordered with E:00, E:01, E:02, or E:04 options.
Selection Guide & Purchasing Advice
When ordering, confirm the standoff adapter length and probe penetration match your machine's geometry. AutoDCSTech stocks the 21000-34-00-20-028-04-02 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 | 21000-34-00-20-028-04-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
