Precision External Housing for Reliable Shaft Vibration Monitoring

The Bently Nevada 21000-28-05-00-050-03-02 3300 XL Probe Housing Assembly is a premium external mounting solution designed to protect 3300 XL 8 mm reverse-mount proximity probes with multiple hazardous-area approvals while ensuring accurate shaft vibration and position measurements. As part of the trusted 21000 Series, this housing assembly provides excellent mechanical protection, simplified probe adjustment, and dependable environmental sealing for critical rotating machinery operating in harsh industrial environments. Its rugged construction helps extend probe service life while supporting continuous condition monitoring programs across a wide range of industries.

This configuration includes a 3300 XL 8 mm reverse-mount proximity probe, a 0.5 m (20 in.) integral probe cable, no standoff adapter, a 5.0 in. (127 mm) probe penetration, Option 03 conduit fittings, and a 3/4-14 NPT mounting thread. The medium-length probe penetration offers an excellent balance between installation flexibility and measurement stability, making it suitable for numerous turbine, compressor, and motor applications.

Product Overview & Technical Specifications

Technical FAQs

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

It provides a secure, sealed enclosure for a 3300 XL 8 mm reverse-mount proximity probe, protecting the sensor while enabling precise shaft vibration and position monitoring.

2. Which probe is supplied with this configuration?

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

3. What does option "05" indicate?

Option 05 specifies a 0.5-meter (20-inch) integral probe cable.

4. What does option "00" represent?

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

5. What does probe penetration "050" specify?

It designates a 5.0-inch (127 mm) probe penetration length, making the assembly suitable for many standard bearing housing applications.

6. What is included in fitting option "03"?

Option 03 includes one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and one cable seal grip with interchangeable grommets for multiple cable sizes.

7. Which mounting thread does this assembly use?

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

8. What materials are used in the housing construction?

The housing features a cast aluminum body combined with a 304 stainless-steel sleeve, providing excellent strength, corrosion resistance, and durability.

9. Is this model suitable for hazardous-area installations?

Yes. The included 3300 XL 8 mm probe supports multiple hazardous-area approvals, making it suitable for certified industrial environments when installed according to applicable requirements.

10. Which industries commonly use this housing assembly?

It is widely used in oil & gas, power generation, petrochemical, mining, pulp and paper, water treatment, and other facilities operating critical rotating machinery.