Bently Nevada 21000-28-05-00-105-04-02 Housing

Bently Nevada 21000 Proximity Probe Housing Assembly

Product Introduction

The 21000-28-05-00-105-04-02 belongs to the Bently Nevada 21000 series. This series offers proximity probe housing assemblies for rotating machinery. Specifically, each assembly holds a reverse mount proximity probe. It also provides a dome cover, threaded conduit ports, and a probe sleeve. The housing protects the probe from dust, moisture, and mechanical damage.

Furthermore, this model supports the 3300 XL 8 mm probe with selectable hazardous area approvals. The 3/4-14 NPT mounting thread ensures a stable connection. Meanwhile, the aluminum body with a 304 stainless steel sleeve offers lasting durability. The assembly meets API 670 standards for externally mounted probe housings.

Technical Specifications

The 21000-28-05-00-105-04-02 provides a specific setup for vibration monitoring. First, the probe option code 28 means a 3300 XL 8 mm probe with selectable hazardous area approvals. Next, the cable length option 05 gives a 0.5 m (20 in) cable. In addition, the standoff adapter option is 00, which means no standoff adapter. The probe penetration option is 105, which equals 10.5 in.

Moreover, the adjustment range of probe penetration is 13 mm (± 0.5 in). For penetration lengths between 1.0 and 2.0 inches, counter boring the machine case may be needed. This step reduces probe side view or rear view effects. If the total penetration exceeds 300 mm (12 in), add sleeve support near the probe. This support prevents resonance from occurring.

Mechanical and Environmental Parameters

The housing uses an aluminum body with a 304 stainless steel sleeve. The mounting thread is 3/4-14 NPT. The fitting option 04 includes one 3/4-14 NPT plug only. Because the standoff adapter option is 00, the mounting thread option 02 is not required. However, option 02 must be ordered when the standoff adapter length is not 00.

Additionally, the maximum (C) + (D) dimension with visible probe is 13.5 in (34.3 cm). For a 0.5 m cable, the probe P/N and S/N are not visible. The typical weight is 1.1 kg (2.4 lb) without fittings. The assembly carries CSA approvals for hazardous areas. It meets Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, and G, and Class III. The enclosure type is 4. Temperature ratings include T5 at -50 °C to +40 °C and T4 at -50 °C to +80 °C.

Installation Guide

Proper installation ensures reliable performance. First, verify the machine case has the correct thread for the 3/4-14 NPT mounting. Next, insert the probe sleeve into the housing body. Then, connect the 3300 XL 8 mm probe to the cable. After that, screw the dome cover onto the housing body. Finally, tighten the cable seal grip to secure the cable.

Besides, confirm that no standoff adapter is needed for this configuration. For hazardous areas, follow drawing 140979 for non-incendive circuits. Meanwhile, keep the probe penetration within the specified adjustment range. If the total penetration exceeds 300 mm, add sleeve support. This action prevents resonance and maintains signal accuracy.

Packaging List

The package includes the following items. One 21000-28-05-00-105-04-02 proximity probe housing assembly. One 3300 XL 8 mm probe with connector. One 0.5 m (20 in) probe cable. One dome cover. One probe sleeve. One thread seal. One 3/4-14 NPT plug. O-rings as required.

FAQ

What is the main function of this assembly?
The 21000-28-05-00-105-04-02 houses and protects a proximity probe. It ensures accurate measurement of shaft vibration and position.

Which probe does this model include?
This model includes a 3300 XL 8 mm probe with a 0.5 m (20 in) cable. The probe option code is 28.

Does this model include a standoff adapter?
No, this model uses standoff adapter option 00. That code means no standoff adapter is included.

Can I use this assembly in hazardous areas?
Yes, the housing carries CSA approvals for explosion-proof applications. It meets Class I, II, and III requirements.

How is this product shipped?
We ship this product via Fedex, UPS, or DHL. Each unit is packed in factory original packaging.