21000-28-05-00-070-01-02 Bently Nevada Housing Assembly

Bently Nevada 21000 Proximity Probe Housing Assembly

Product Introduction

The Bently Nevada 21000-28-05-00-070-01-02 is a complete proximity probe housing assembly for permanent machine condition monitoring. This configuration includes a 3300 XL 8 mm probe with a 0.5-meter cable and a 7-inch probe penetration depth. The housing features an aluminum body with a 304 stainless steel sleeve. Moreover, this model includes one 3/4-14 NPT explosion-proof fitting and one plug, making it ideal for installations requiring maximum safety.

Technical Specifications

This section outlines the core technical parameters of the 21000 assembly.

• Probe Option: 3300 XL 8 mm probe with connector (selectable hazardous area approvals)

• Probe Cable Length: 0.5 m (20 in)

• Standoff Adapter: 0 inches (not included)

• Probe Penetration: <span style="color:#FF0000;">7.0 inches</span>

• Fitting Option: One 3/4-14 NPT explosion-proof fitting and one 3/4-14 NPT plug

• Mounting Thread: <span style="color:#0000FF;">3/4-14 NPT</span>

• Material: Aluminum body with 304 stainless steel sleeve

• Maximum Dimension (C+D): 13.5 in (34.3 mm) with a non-visible probe

• Weight: 1.1 kg (2.4 lb) typical without fittings

Furthermore, this Bently Nevada housing supports reverse mount proximity probes for flexible installation. The housing also includes threaded ports that accept standard conduit connections. Meanwhile, the 7-inch probe penetration accommodates deeper mounting requirements. Additionally, the standoff adapter is omitted, simplifying the assembly process.

Mechanical and Environmental Ratings

The 21000-28-05-00-070-01-02 offers robust performance under extreme conditions.

• Temperature Rating T5: -50°C to +40°C

• Temperature Rating T4: -50°C to +80°C

• Enclosure Type: CSA Type 4 (weather-resistant)

• Hazardous Area Approvals:

  • Class I, Divisions 1 & 2, Groups C & D

  • Class II, Divisions 1 & 2, Groups E, F, & G

  • Class III

• Circuit Rating: Non-incendive when connected per drawing 140979

Specifically, the housing is fully compliant with the American Petroleum Institute (API) 670 Standard. This compliance ensures reliable performance in critical turbomachinery applications such as compressors, turbines, and pumps. For intrinsically safe applications, you can order hazardous area approved probes with this housing. Moreover, the 304 stainless steel sleeve provides excellent corrosion resistance, extending the product's service life.

Installation Guidelines

Proper installation is crucial for the Bently Nevada 21000 assembly.

First, verify the mounting thread is 3/4-14 NPT to match your equipment. Next, set the probe penetration to exactly 7.0 inches for the correct air gap. The standoff adapter is not required for this model, simplifying the mounting process.

First, screw the probe sleeve into the housing body securely. Then, install the O-rings to maintain the environmental seal. After that, attach the dome cover over the probe. Finally, connect the explosion-proof fitting to the conduit port for maximum safety. Consequently, this ensures a stable and accurate measurement.

Packaging and Delivery

Each Bently Nevada 21000-28-05-00-070-01-02 unit is shipped brand new in factory packaging. The shipment includes the complete housing assembly with the pre-installed probe. It also contains the necessary O-rings for sealing. In addition, the package includes the mounting thread seal and the explosion-proof fitting. The fitting ensures compliance with hazardous area installation requirements.

We ship all orders via reliable couriers. Delivery is handled through FedEx, UPS, or DHL. These expedited shipping methods ensure you receive your parts quickly and safely.

Frequently Asked Questions (FAQ)

1. Does this assembly come with the proximity probe included?
Yes, the 21000-28-05-00-070-01-02 includes a 3300 XL 8 mm reverse mount probe with a 0.5-meter cable.

2. What is the difference between this and the version with a standoff adapter?
This model has no standoff adapter (00), meaning the probe mounts directly. The 7-inch penetration is achieved through the sleeve length alone.

3. Can this housing be used in a Class I, Division 1 area?
Absolutely. This 21000 assembly is CSA certified for Class I, Divisions 1 and 2, making it explosion-proof.

4. What is the total length of the assembly?
The maximum combined dimension from the mounting surface to the probe tip is 13.5 inches (34.3 mm).

5. Is this housing suitable for offshore platforms?
Yes, the 304 stainless steel sleeve offers excellent corrosion resistance. Its CSA Type 4 enclosure also makes it suitable for offshore applications.