Compact Hazardous-Area Probe Housing for Reliable Machinery Protection

The Bently Nevada 21000-27-05-40-026-03-02 3300 XL NSv Probe Housing Assembly is a rugged external mounting solution engineered for 3300 XL NSv proximity probes in applications where space is limited or hazardous-area approvals are required. As part of the proven 21000 Proximity Probe Housing Assembly family, this assembly protects the probe from contamination, moisture, vibration, and mechanical damage while allowing convenient probe adjustment and maintenance without disassembling the machine. It is widely used on turbines, compressors, motors, pumps, and other critical rotating equipment operating in demanding industrial environments.

This configuration features a 3300 XL NSv reverse-mount proximity probe with selectable hazardous-area approvals, a 0.5 m (20 in.) probe cable, a 4.0 in. (102 mm) standoff adapter, a 2.6 in. (66 mm) probe penetration, Option 03 conduit fittings with cable seal grip, and a 3/4-14 NPT mounting thread. The compact penetration combined with the extended standoff provides installation flexibility while maintaining excellent probe stability and measurement accuracy.

Technical Specifications

Technical FAQs

1. What is the purpose of the 21000-27-05-40-026-03-02 housing assembly?

It provides a protected external mounting enclosure for a 3300 XL NSv reverse-mount proximity probe, allowing accurate shaft vibration and position measurements while protecting the probe from harsh operating conditions.

2. Which probe is included?

This model includes a 3300 XL NSv reverse-mount proximity probe with selectable hazardous-area approvals (Option 27).

3. What does option "05" indicate?

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

4. What does option "40" represent?

It specifies a 4.0-inch (102 mm) standoff adapter, providing additional clearance between the housing and the mounting surface.

5. What does option "026" indicate?

Option 026 represents a 2.6-inch (66 mm) probe penetration length.

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

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

7. Which mounting thread is used?

The housing utilizes a 3/4-14 NPT mounting thread, providing a secure mechanical installation for industrial machinery.

8. What materials are used in the housing?

The assembly features a cast aluminum housing combined with a 304 stainless-steel probe sleeve for durability and corrosion resistance.

9. Is this assembly suitable for hazardous locations?

Yes. This configuration includes a 3300 XL NSv probe with selectable hazardous-area approvals, making it suitable for installations requiring certified probe options.

10. Which industries commonly use this housing assembly?

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