Bently Nevada 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly

Parameter
Model: 21000-28-05-40-028-04-02 Proximity Probe Housing Assembly 
Probe with Connector: 28-3300 XL 8mm probe, selectable hazardous area approvals
Probe Cable Length: 05-0.5 m (20 in)
Standoff Adapter (Option C Dimension): 40-4.0 in
Probe Penetration (Option D Dimension): 028-2.8 in
Fittings: 04-One 3/4-14 NPT plug only
Mounting Thread: 02-3/4-14 NPT

Description

The Bently Nevada 21000-28-05-40-028-04-02 is a 21000 Proximity Probe Housing Assembly designed for external mounting of proximity probes on critical rotating machinery. The assembly provides a protected installation structure for the proximity probe while allowing convenient access for probe adjustment and replacement without removing major machine components. The 21000 housing assembly uses a reverse-mounted proximity probe design and is intended for machinery protection applications requiring reliable shaft monitoring. The 21000 housing assembly consists of an aluminum housing body, probe sleeve, dome cover, threaded conduit connections, O-rings, thread seal, and related mounting components to provide a complete external probe mounting solution. The integrated 3300 XL 8 mm proximity probe provides non-contact measurement when connected with compatible Bently Nevada extension cables and Proximitor® Sensors. It is used for monitoring shaft vibration, radial shaft displacement, shaft position, and other dynamic conditions of rotating machinery. The selectable hazardous area approval option allows the probe assembly to be applied in approved industrial environments where certified monitoring equipment is required.

Frequently asked questions

Q:Does the 21000-28-05-40-028-04-02 support hazardous area applications?
A:Yes. The configuration includes a 3300 XL 8 mm probe with selectable hazardous area approvals. When installed according to the applicable certification requirements, it can be used in approved industrial hazardous area applications.

Q:What materials are used in the 21000 housing assembly?
A:The 21000 housing assembly uses an aluminum body with a 304 stainless steel probe sleeve. This construction provides mechanical strength and corrosion resistance for industrial rotating equipment installations.

Q:What measurements can be performed with this assembly?

A:When connected with compatible Bently Nevada extension cables and Proximitor® Sensors, the assembly supports non-contact measurements such as shaft vibration, radial shaft displacement, and shaft position monitoring for machinery condition monitoring systems.

Application areas

• Oil and Gas Production Facilities – Applied to rotating machinery installed in upstream and downstream oil and gas applications. The configuration includes a 3300 XL 8 mm proximity probe with selectable hazardous area approvals, making it suitable for approved industrial locations requiring certified monitoring equipment.
• Pipeline Compressor Stations – Used on compressor packages that operate continuously for natural gas transmission. The external probe housing allows maintenance personnel to access the proximity probe more easily while maintaining reliable shaft vibration and position measurement for machinery protection systems.
• Power Plant Auxiliary Machinery – Installed on auxiliary turbines, pumps, and other rotating assets supporting power generation systems. The assembly helps provide continuous monitoring of shaft movement and supports predictive maintenance programs by supplying stable proximity measurement signals.

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