Product Overview
The Bently Nevada 21000-28-00-00-030-04-02 is a precision-engineered Proximity Probe Housing Assembly designed for demanding industrial environments. This model combines a rugged aluminum body with a 304 stainless steel sleeve, ensuring durability and corrosion resistance. It is part of the 21000 series, which is fully compliant with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings.
This assembly includes a dome cover, threaded conduit ports, a probe sleeve, O-rings, a reverse mount proximity probe, and a thread seal. It supports optional conduit fittings and a standoff adapter, making it adaptable to various installation requirements.
Technical Specifications
The 21000-28-00-00-030-04-02 is built to precise specifications for reliable performance:
| Parameter |
Value |
| Probe Option |
3300 XL 8 mm probe with connector (28) |
| Probe Cable Length |
1.0 m (39 in) (10) |
| Standoff Adapter |
None (00) |
| Probe Penetration |
3 in (030) |
| Fitting Option |
One 3/4-14 NPT plug only (04) |
| Mounting Thread |
3/4-14 NPT (02) |
| Material |
Aluminum body with 304 stainless steel sleeve |
| Maximum (C) + (D) with visible probe |
17.0 in (43.18 cm) |
| Maximum (C) + (D) Dimension |
32.9 in (83.5 cm) |
| Weight (without fittings) |
1.1 kg (2.4 lb) typical |
Industry Applications
The 21000-28-00-00-030-04-02 excels in rotating machinery monitoring, such as turbines, compressors, and pumps. For example, in a petrochemical plant, this housing assembly provides accurate shaft vibration and position measurements, enabling predictive maintenance. Its CSA Type 4 enclosure rating and explosion-proof certification make it suitable for hazardous areas, including Class I Divisions 1 and 2 Groups C and D, and Class II Divisions 1 and 2 Groups E, F, and G.
Installation & Setup Guidance
When installing the 21000-28-00-00-030-04-02, ensure the mounting thread (3/4-14 NPT) is properly sealed to maintain the enclosure rating. The probe penetration of 3 inches must be set to achieve the correct gap. If a standoff adapter is not used (option 00), the mounting thread option must be specified. Always follow the wiring diagram (drawing 140979) for non-incendive circuit connections.
Maintenance & Reliability
Routine inspection of the probe and cable is essential to prevent downtime. Check the O-rings and thread seal for wear during each maintenance cycle. The aluminum body with stainless steel sleeve offers excellent resistance to harsh environments, reducing maintenance frequency. This reliability translates to lower total cost of ownership over the asset's lifecycle.
Selection Guide & Purchasing Advice
Before ordering, verify that the probe cable length and penetration match your application requirements. Confirm the fitting and mounting thread options are compatible with your existing conduit and mounting points. For hazardous area installations, ensure the housing certification (CSA) aligns with your region's requirements. PLC Source PRO offers this Bently Nevada 21000-28-00-00-030-04-02 as new, original equipment in factory packing, backed by a 12-month warranty.