Engineered for Reliable External Mounting in Critical Monitoring Systems

The Bently Nevada 21000-28-10-00-045-04-02 3300 XL Probe Housing Assembly is a premium external mounting assembly designed to protect 3300 XL 8 mm reverse-mount proximity probes with selectable hazardous-area approvals while ensuring stable and accurate shaft vibration and position measurements. As part of the proven 21000 Series, this housing assembly combines a rugged cast aluminum body with a corrosion-resistant stainless-steel probe sleeve to withstand demanding industrial environments. Its service-friendly design allows technicians to inspect, adjust, or replace the proximity probe without dismantling the machine, reducing maintenance time and improving equipment availability. The assembly is widely used in predictive maintenance and API 670-compliant machinery protection systems.

This configuration features a 3300 XL 8 mm reverse-mount proximity probe, a 1.0 m (39 in.) integral probe cable, no standoff adapter, a 4.5 in. (114 mm) probe penetration, Option 04 conduit fittings, and a 3/4-14 NPT mounting thread. The 4.5-inch probe penetration provides an excellent balance between installation flexibility and measurement stability for a wide variety of rotating equipment.

Technical Specifications

Technical FAQs

1. What is the function of this probe housing assembly?

It protects the 3300 XL reverse-mount proximity probe while providing external access for probe adjustment and replacement, enabling accurate shaft vibration and position monitoring.

2. Which probe is included?

This configuration includes a 3300 XL 8 mm reverse-mount proximity probe with selectable hazardous-area approvals (Option 28).

3. What does option "10" indicate?

Option 10 specifies a 1.0-meter (39-inch) integral probe cable.

4. What does option "00" represent?

Option 00 indicates that no standoff adapter is supplied, allowing direct installation onto the machine housing.

5. What does probe penetration "045" specify?

It designates a 4.5-inch (114 mm) probe penetration, making the assembly suitable for many standard bearing housing applications.

6. What is included with fitting option "04"?

Option 04 includes one 3/4-14 NPT plug, providing a straightforward conduit configuration for installations that do not require additional sealing accessories.

7. Which mounting thread does this model use?

The housing is supplied with a 3/4-14 NPT mounting thread, ensuring secure installation on industrial machinery.

8. What materials are used in the housing?

The assembly features a cast aluminum housing with a 304 stainless-steel probe sleeve, providing excellent corrosion resistance and mechanical durability.

9. Is this assembly suitable for hazardous locations?

Yes. The included 3300 XL 8 mm probe supports selectable hazardous-area approvals, making it suitable for certified industrial installations when used according to applicable standards.

10. Which industries commonly use this product?

It is widely deployed in oil & gas, petrochemical, power generation, mining, water treatment, and other industries operating critical rotating equipment.