Product Overview
The Bently Nevada 21000-16-10-00-256-01-02 is a precision-engineered Proximity Probe Housing Assembly designed for reliable vibration monitoring in critical rotating machinery. This model includes a 3300 XL 8 mm probe with connector, a 1.0 m (39 in) probe cable, and a 25.6-inch probe penetration dimension. It features an aluminum body with a 304 stainless steel sleeve, ensuring durability in harsh industrial environments.
Technical Specifications
| Parameter |
Value |
| Probe Option |
16 – 3300 XL 8 mm probe with connector |
| Probe Cable Length |
10 – 1.0 m (39 in) |
| Standoff Adapter |
00 – No standoff adapter |
| Probe Penetration (Option D) |
256 – 25.6 in |
| Fittings |
-01 – One explosion-proof fitting and one plug |
| Mounting Thread |
02 – 3/4-14 NPT |
| Material |
Aluminum body with 304 stainless steel sleeve |
| Maximum (C) + (D) with visible probe label |
17.0 in (43.18 cm) |
| Maximum (C) + (D) Dimension |
32.9 in (83.5 cm) |
| Weight (typical, without fittings) |
1.1 kg (2.4 lb) |
The 21000-16-10-00-256-01-02 is CSA certified as an explosion-proof enclosure for hazardous areas, meeting Class 1 Divisions 1 and 2 Groups C and D, Class 2 Divisions 1 and 2 Groups E, F, and G, and Class III. It is rated T5 @ Ta = -50 °C to +40 °C and T4 @ Ta = -50 °C to +80 °C. The housing is also compliant with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings.
Key Features & Benefits
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Explosion-proof design: Certified for use in hazardous areas, ensuring safe operation in volatile environments.
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Robust construction: Aluminum body with 304 stainless steel sleeve provides corrosion resistance and long service life.
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Flexible configuration: Optional standoff adapter and various mounting threads allow customization to fit specific machine requirements.
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API 670 compliance: Meets industry standards for externally mounted proximity probes, ensuring reliability and performance.
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Complete assembly: Includes dome cover, threaded ports, probe sleeve, O-rings, reverse mount proximity probe, and thread seal.
Industry Applications
The Bently Nevada 21000-16-10-00-256-01-02 is ideal for vibration monitoring in compressors, turbines, pumps, and other rotating equipment across oil & gas, power generation, and manufacturing industries. Its explosion-proof rating makes it suitable for chemical plants and refineries where flammable gases or dust may be present.
Installation & Setup Guidance
When installing the 21000-16-10-00-256-01-02, ensure the mounting thread (3/4-14 NPT) is properly sealed to maintain the explosion-proof integrity. For probe penetration lengths between 1.0 and 2.0 inches, counter boring the machine case may be necessary to reduce side-view or rear-view effects. If the total probe penetration (C plus D) exceeds 300 mm (12 in), add sleeve support near the probe to prevent resonance. The adjustment range for option D is 13 mm (±0.5 in).
Maintenance & Reliability
Regularly inspect the housing for signs of wear, corrosion, or damage, especially in harsh environments. Check O-rings and thread seals during routine maintenance to ensure a proper seal. The 304 stainless steel sleeve offers excellent resistance to corrosion, extending the service life of the assembly. Following these practices helps minimize downtime and reduces long-term replacement costs.
Selection Guide & Purchasing Advice
Before purchasing, verify that the probe cable length and penetration dimensions match your machine's requirements. Confirm the mounting thread configuration and optional fittings are compatible with your installation. PLC Source PRO offers the Bently Nevada 21000-16-10-00-256-01-02 as a new, original unit in factory packing, backed by a 12-month warranty. For assistance with configuration or compatibility, contact our team of industrial automation specialists.