Technical Specifications Breakdown
Key parameters for the 21000-16-05-15-072-03-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Probe Option | 3300 XL 8 mm probe with connector |
| Probe Cable Length | 0.5 m (20 in) |
| Standoff Adapter | 1.5 in (38 mm) |
| Probe Penetration (D) | 7.2 in |
| Fittings | One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, cable seal grip |
| Mounting Thread | 3/4-14 NPT |
| Material | Aluminum body with 304 stainless steel sleeve |
| Weight (without fittings) | 1.1 kg (2.4 lb) typical |
| Hazardous Area Approval | CSA Class 1 Divisions 1 and 2 Groups C and D; Class 2 Divisions 1 and 2 Groups E, F, G; Enclosure Type 4 |
Industry Applications for the 21000 Housing Assembly
This housing assembly is engineered for critical machinery protection in oil refineries, chemical plants, and gas processing facilities. The CSA Type 4 enclosure and explosion-proof rating allow direct mounting on compressors, pumps, and turbines in Division 1 hazardous zones. The 3300 XL 8 mm probe delivers accurate shaft displacement data, enabling early detection of bearing wear or imbalance.

Installation & Setup Guidance
When installing the 21000-16-05-15-072-03-02, ensure the mounting thread (3/4-14 NPT) matches the machine case port. For probe penetration lengths between 1.0 and 2.0 inches, counter boring the machine case may be necessary to reduce side view effects. If the combined C plus D dimension exceeds 300 mm (12 in), add sleeve support near the probe to prevent resonance. The adjustment range for the D dimension is 13 mm (±0.5 in).
Maintenance & Reliability
Periodically inspect the housing seals and conduit fittings for signs of corrosion or damage. The aluminum body with 304 stainless steel sleeve provides resistance to process environments. Verify that the cable seal grip grommets are properly sized for the cable diameter (1/8 to 3/8 inches) to maintain the explosion-proof integrity.
The Challenge of Reliable Vibration Monitoring in Hazardous Environments
In rotating machinery monitoring, maintaining probe integrity under harsh conditions is critical. The Bently Nevada 21000-16-05-15-072-03-02 proximity probe housing assembly provides a robust solution for continuous vibration measurement in explosive atmospheres. This assembly combines a 3300 XL 8 mm probe with a sealed aluminum housing, ensuring stable performance in Class I Division 1 and 2 areas.

Compatibility & 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 proximity probes when used with appropriate barriers. The assembly is RoHS compliant (Directive 2011/65/EU) and meets FCC Part 15 requirements.
Selection Guide & Purchasing Advice
When ordering the 21000-16-05-15-072-03-02, verify that the probe cable length (0.5 m) and standoff adapter (1.5 in) match your installation geometry. 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 | 21000-16-05-15-072-03-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
