Product Overview
When hazardous-area machinery demands precise vibration monitoring, the Bently Nevada 21000-28-10-20-028-04-02 delivers a robust, explosion-proof housing assembly for 3300 XL 8 mm proximity probes. This Industrial Automation Module is engineered to protect the probe while maintaining accurate clearance measurements in the harshest environments.
As part of the trusted 21000 series, the 21000-28-10-20-028-04-02 combines an aluminum body with a 304 stainless steel sleeve, ensuring durability and corrosion resistance. It is CSA Type 4 certified and fully compliant with API 670, making it a reliable choice for rotating machinery protection.
Technical Specifications
| Parameter |
Value |
| Model |
21000-28-10-20-028-04-02 |
| Probe Option |
3300 XL 8 mm probe with connector |
| Probe Cable Length |
1.0 m (39 in) |
| Standoff Adapter |
2 in |
| Probe Penetration |
2.8 in |
| Fitting Option |
One 3/4-14 NPT plug |
| Mounting Thread |
3/4-14 NPT |
| Material |
Aluminum body with 304 stainless steel sleeve |
| Maximum (C) + (D) Dimension (visible probe) |
17.0 in (43.18 cm) |
| Maximum (C) + (D) Dimension (with visible P/N and S/N) |
32.9 in (83.5 cm) |
| Weight |
1.1 kg (2.4 lb) typical, without fittings |
| Certifications |
CSA explosion-proof, RoHS 2011/65/EU |
| Temperature Rating |
T5 @ Ta = -50°C to +40°C; T4 @ Ta = -50°C to +80°C |
Why Choose This Housing Assembly?
This housing assembly offers a cost-effective solution for retrofitting or upgrading existing vibration monitoring systems. Its modular design simplifies installation, reducing downtime and labor costs. The 21000-28-10-20-028-04-02 is built to last, minimizing the need for frequent replacements and providing long-term ROI.
Industry Applications
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Oil & Gas: Monitors compressor and pump vibration in explosive atmospheres, ensuring safe operation.
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Power Generation: Tracks turbine shaft vibration to prevent catastrophic failures and unscheduled outages.
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Manufacturing: Provides reliable condition monitoring for large rotating equipment, improving predictive maintenance programs.
Installation & Setup
Before mounting, verify the mounting thread (3/4-14 NPT) matches your machine's port. Install the housing so the probe tip reaches the correct penetration depth (2.8 in). Secure the standoff adapter (2 in) and tighten the NPT plug. Always follow the provided drawing (140979) for non-incendive circuit connections.
Maintenance & Reliability
Regularly inspect the probe cable for wear and ensure the housing seals remain intact. Because the assembly is rated for hazardous areas, never open it while power is applied. Periodic checks of the mounting torque and thread condition will extend service life and maintain measurement accuracy.
Selection Guide
When ordering, confirm the exact part number 21000-28-10-20-028-04-02 to ensure you receive the correct configuration. This unit ships new in factory packaging with a 12-month warranty. For reliable sourcing and fast delivery, choose PLC Source PRO as your trusted automation parts supplier.