Technical Specifications Breakdown
Key parameters for the 21000-28-00-00-030-04-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21000 - Proximity Probe Housing Assemblies |
| Probe Option | 28 3300 XL 8 mm probe, selectable hazardous area approvals |
| Probe Cable Length | 1.0 m (39 in) |
| Probe Penetration | 030 = 3 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 |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
Industry Applications and Cost Impact
This housing assembly is engineered for use in refineries, chemical plants, and power generation facilities where explosion-proof ratings are required. The CSA Type 4 enclosure and compliance with API 670 Standard reduce the risk of environmental contamination, lowering maintenance costs by preventing premature probe failure. By selecting the 21000-28-00-00-030-04-02, operators avoid costly unplanned shutdowns.

Installation and Setup Guidance
Mount the housing using the 3/4-14 NPT thread option to ensure a secure seal. The 3 in probe penetration accommodates standard bearing housing depths. Use the provided 3/4-14 NPT plug for unused ports to maintain enclosure integrity. Confirm that the probe cable length of 1.0 m meets your routing requirements before installation.
Maintenance and Reliability
Inspect the O-rings and dome cover seal periodically to maintain the explosion-proof rating. The aluminum body resists corrosion in most industrial environments, while the stainless steel sleeve protects the probe from wear. This design reduces the frequency of replacements, directly improving operational ROI.
Cost-Effective Protection for Critical Rotating Machinery
When uptime is paramount, the Bently Nevada 21000-28-00-00-030-04-02 proximity probe housing assembly delivers reliable vibration monitoring in harsh environments. This aluminum body housing with a 304 stainless steel sleeve provides a rugged enclosure for the 3300 XL 8 mm probe, ensuring accurate readings while reducing the total cost of ownership through minimized false trips and extended service life.

Compatibility and Integration
The 21000 housing is fully compliant with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings. It supports intrinsically safe applications when ordered with hazardous area approved probes. The CSA certification covers Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, and G, and Class III.
Selection Guide and Purchasing Advice
When ordering the 21000-28-00-00-030-04-02, verify that the probe cable length and penetration match your machine train specifications. AutoDCSTech stocks this assembly as new and original in factory packing with a 12-month warranty. Contact our team to confirm lifecycle status and availability before placing your order.
Availability & Condition at AutoDCSTech
| Part Number | 21000-28-00-00-030-04-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
