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

Bently Nevada 21000-28-05-00-105-04-02 Proximity Probe Housing Assembly

The assembly functions as a heavy-duty, environmental shielding enclosure designed to house and protect a reverse-mount proximity probe in harsh industrial process conditions. By utilizing a ruggedized, explosion-proof layout, this mechanical module enables precise shaft vibration and axial position measurements on turbines, compressors, and large rotating machinery while sealing internal electrical links from ambient moisture and hazardous gas leakage.

Technical Specifications

Quick Installation Guide

• Mount the main aluminum housing block directly into the machine frame casing utilizing the designated 3/4-14 NPT connection threads (Standoff adapter is bypassed in this setup).
• Verify that the internal 304 stainless steel probe sleeve extends precisely 10.5 inches into the housing port to establish correct geometric alignment over the rotating shaft target.
• Carefully thread the reverse-mount 3300 XL 8mm probe through the extension tube, routing its 0.5-meter trailing coaxial wire smoothly into the dome junction area.
• Apply the included thread sealant compound to the external interfaces, verify that the triple-layer O-ring set is seated correctly, and screw the outer dome cover tightly into place.

Technical FAQs

Q1: What structural components are integrated inside the 21000 series assembly to shield field equipment?
A1: The complete 1.1 kg setup consists of a specialized dome cover that threads into the aluminum body shell, integrated ports for conduit wiring networks, an elongated 10.5-inch probe tracking sleeve, a triple-layer O-ring assembly, a reverse-mount proximity transducer probe, and active thread seals. This design maintains atmospheric integrity around the sensor core under extreme pressures.

Q2: Why is the direct-mount configuration preferred over standoff adapter options?
A2: This specific model features the 00 standoff and 02 mounting options, which allow the assembly to lock tightly flush onto the machine faceplate via 3/4-14 NPT connections. Direct-mounting lowers the external mass profile, decreases leverage vibration vectors across the 1.1 kg body, and provides stable tracking across deep 10.5-inch internal reaches.

Q3: Which hazardous area and industrial standards apply to this housing configuration?
A3: The assembly features global certification markings, including compliance with RoHS 2011/65/EU parameters, CSA Class I/II/III ratings for explosive atmospheres, and ATEX equivalents. Additionally, the geometric layout adheres to strict API 670 industry standards for machinery protection systems.