High-Reliability External Probe Housing for Precision Machine Protection

The Bently Nevada 21000-28-10-00-041-04-02 3300 XL Probe Housing Assembly is a durable external mounting solution engineered for 3300 XL 8 mm reverse-mount proximity probes with selectable hazardous-area approvals. Designed for continuous machinery condition monitoring, this housing assembly protects the probe from contamination, vibration, moisture, and mechanical damage while allowing convenient probe gap adjustment and replacement without dismantling the machine. Manufactured with a rugged aluminum housing and stainless-steel probe sleeve, it delivers long-term reliability in demanding industrial environments and fully supports API 670 machinery protection practices.

This configuration includes a 3300 XL 8 mm reverse-mount proximity probe, a 1.0 m (39 in.) integral probe cable, no standoff adapter, a 4.1 in. (104 mm) probe penetration, Option 04 conduit fittings, and a 3/4-14 NPT mounting thread. The medium probe penetration provides an ideal balance between installation flexibility and probe stability, making it suitable for a wide range of rotating equipment.

Product Specifications

Technical FAQs

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

It provides a protected external mounting enclosure for a 3300 XL 8 mm reverse-mount proximity probe, ensuring accurate shaft vibration and position monitoring while protecting the sensing system from harsh industrial conditions.

2. Which proximity 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" mean?

Option 00 indicates that no standoff adapter is supplied, allowing the housing to mount directly to the machine casing.

5. What does probe penetration "041" represent?

It specifies a 4.1-inch (104 mm) probe penetration length, providing reliable installation for many standard bearing housing applications.

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

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

7. Which mounting thread is provided?

This model uses 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, offering excellent durability and corrosion resistance.

9. Is this assembly suitable for hazardous locations?

Yes. The included 3300 XL 8 mm probe is supplied with selectable hazardous-area approvals, making it suitable for certified industrial applications when installed according to applicable standards.

10. Which industries commonly use this product?

It is widely installed in oil & gas, petrochemical, power generation, mining, pulp and paper, water treatment, and other industries that rely on continuous monitoring of critical rotating equipment.